Q 1 - ISD 622
... 1. Arrange all observations from smallest to largest. 2. If the number of observations n is odd, the median is the center observation in the ordered list. 3. If the number of observations n is even, the median is the average of the two center observations in the ordered list. ...
... 1. Arrange all observations from smallest to largest. 2. If the number of observations n is odd, the median is the center observation in the ordered list. 3. If the number of observations n is even, the median is the average of the two center observations in the ordered list. ...
Descriptive Statistics
... 6. The σ and σ 2 defined above are the so-called population standard deviation and variance. They assume that the entire population of data consists of our n data points. If our n points are merely a sample of a larger population, then we would divide by n − 1 rather than n to get the sample standard ...
... 6. The σ and σ 2 defined above are the so-called population standard deviation and variance. They assume that the entire population of data consists of our n data points. If our n points are merely a sample of a larger population, then we would divide by n − 1 rather than n to get the sample standard ...
Numeric Variable
... – ________: takes on values which are spaced. That is, for two values of a discrete variable that are adjacent, there is no value that goes between them. – ________: values are all numbers in a given interval. That is, for two values of a continuous variable that are adjacent, there is another value ...
... – ________: takes on values which are spaced. That is, for two values of a discrete variable that are adjacent, there is no value that goes between them. – ________: values are all numbers in a given interval. That is, for two values of a continuous variable that are adjacent, there is another value ...
155-2012: How to Perform and Interpret Chi-Square
... variable. Ordinal Variables Ordinal variables are another type of variable where there are a discrete number of values but the values have some inherent order to them. For example, Likert scale variables (strongly disagree, disagree, agree to strongly agree) are ordinal variables. There is an inhere ...
... variable. Ordinal Variables Ordinal variables are another type of variable where there are a discrete number of values but the values have some inherent order to them. For example, Likert scale variables (strongly disagree, disagree, agree to strongly agree) are ordinal variables. There is an inhere ...
In order to discuss the variables in the study, they must first
... deviation is the square root of the sum of the squared range, divided by the sample size. After doing this calculation, the standard deviation describes, on average, how far the scores from the mean are. This can be used to determine its significance of the values to the set. The standard deviation ...
... deviation is the square root of the sum of the squared range, divided by the sample size. After doing this calculation, the standard deviation describes, on average, how far the scores from the mean are. This can be used to determine its significance of the values to the set. The standard deviation ...
Summary of Options - Cicada Bay Website
... Column graphs of the above tables Operates on two variables at a time and in interval form. Numerical or categorical variables permitted. Either discrete or continuous numerical data can be used. For example, we may want a cross-tabulation of 'Gender' by 'Hours Worked' in 10-hour groups. The lower ...
... Column graphs of the above tables Operates on two variables at a time and in interval form. Numerical or categorical variables permitted. Either discrete or continuous numerical data can be used. For example, we may want a cross-tabulation of 'Gender' by 'Hours Worked' in 10-hour groups. The lower ...
02-w11-stats250-bgunderson-chapter-3-and-4
... { Content Open.Michigan has used under a Fair Use determination. } Fair Use: Use of works that is determined to be Fair consistent with the U.S. Copyright Act. (17 USC § 107) *laws in your jurisdiction may differ Our determination DOES NOT mean that all uses of this 3rd-party content are Fair Uses a ...
... { Content Open.Michigan has used under a Fair Use determination. } Fair Use: Use of works that is determined to be Fair consistent with the U.S. Copyright Act. (17 USC § 107) *laws in your jurisdiction may differ Our determination DOES NOT mean that all uses of this 3rd-party content are Fair Uses a ...
Chapter 1 Review
... small class. She reported that the median score was 85 and the mean score was 84. The student with the lowest score (62) realized that the teacher had incorrectly calculated her grade and that the correct grade was 72. Assuming that this is still be the lowest score for the seminar students, when th ...
... small class. She reported that the median score was 85 and the mean score was 84. The student with the lowest score (62) realized that the teacher had incorrectly calculated her grade and that the correct grade was 72. Assuming that this is still be the lowest score for the seminar students, when th ...
Book Chapter 3
... Watch for outliers! Unusual observations in a data set often provide important information about the variable under study, so it is important to consider outliers in addition to describing what is typical. Outliers can also be problematic because the values of some summaries are influenced by outlie ...
... Watch for outliers! Unusual observations in a data set often provide important information about the variable under study, so it is important to consider outliers in addition to describing what is typical. Outliers can also be problematic because the values of some summaries are influenced by outlie ...
Descriptive Statistics
... had scores in the middle two bars of the range (450-499 and 500-549). Similar small numbers of students have very low and very high scores. The bars in the histogram form a distribution (pattern or curve) that is similar to the normal, bell shaped curve. Thus, the frequency distribution of the SAT m ...
... had scores in the middle two bars of the range (450-499 and 500-549). Similar small numbers of students have very low and very high scores. The bars in the histogram form a distribution (pattern or curve) that is similar to the normal, bell shaped curve. Thus, the frequency distribution of the SAT m ...
Means and Variances
... greater than Var(Height) + Var(Shoe) Variance of HeightPlusAge is very close to Var(Height) + Var(Age) ...
... greater than Var(Height) + Var(Shoe) Variance of HeightPlusAge is very close to Var(Height) + Var(Age) ...
Summarizing Quantitative Data: Statistics • statistic Any quantity
... A quantity used to describe some distributional feature of the larger population. There are two chief systems of statistics in common use: ordered statistics, based on an ordering of the data values from lowest to highest; and weighted statistics, which locate features relative to how they balance a ...
... A quantity used to describe some distributional feature of the larger population. There are two chief systems of statistics in common use: ordered statistics, based on an ordering of the data values from lowest to highest; and weighted statistics, which locate features relative to how they balance a ...
S1: Chapter 1 Data: Location
... In statistics, we can use a variable to represent some quantity, e.g. height, age. This could be qualitative (e.g. favourite colour) or quantitative (i.e. numerical). Variables are often used differently in statistics than they are in algebra. ...
... In statistics, we can use a variable to represent some quantity, e.g. height, age. This could be qualitative (e.g. favourite colour) or quantitative (i.e. numerical). Variables are often used differently in statistics than they are in algebra. ...
Mean
... The mean or average number of shoppers in each store? Using Excel to do that • use your own formula • use AVERAGE function ...
... The mean or average number of shoppers in each store? Using Excel to do that • use your own formula • use AVERAGE function ...
Statistical Analysis – The First Steps
... Before introducing the statistical procedure in SAS® which are used to calculated descriptive statistics and perform chi-square and t-tests, the data set that will be used throughout the rest of the paper will be discussed. The data set comes from the book, “A Handbook of Small Data Sets” by Hand et ...
... Before introducing the statistical procedure in SAS® which are used to calculated descriptive statistics and perform chi-square and t-tests, the data set that will be used throughout the rest of the paper will be discussed. The data set comes from the book, “A Handbook of Small Data Sets” by Hand et ...
AP Stats CH1 0809 Actual with Solutions
... 1. A researcher reports that, on average, the participants in his study lost 10.4 pounds after two months on his new diet. A friend of yours comments that she tried the diet for two months and lost no weight, so clearly the report was a fraud. Which of the following statements is correct? (a) Your f ...
... 1. A researcher reports that, on average, the participants in his study lost 10.4 pounds after two months on his new diet. A friend of yours comments that she tried the diet for two months and lost no weight, so clearly the report was a fraud. Which of the following statements is correct? (a) Your f ...
bme stats workshop
... really start by saying, “the obtained value is rare if when calculated from two groups obtained from the same population.” • We would then follow up that statement with, “Since that value is rare and is obtained from an experiment, it is reasonable to conclude that the groups do not come from the sa ...
... really start by saying, “the obtained value is rare if when calculated from two groups obtained from the same population.” • We would then follow up that statement with, “Since that value is rare and is obtained from an experiment, it is reasonable to conclude that the groups do not come from the sa ...
sampleproject
... aggravated assault and index property crimes of burglary, larceny and auto theft. This study indicates a relationship between economic factors and crime. An increase in the average annual income appears to suggest a reduction in violent crimes as well as property crimes. On a negative note, an incre ...
... aggravated assault and index property crimes of burglary, larceny and auto theft. This study indicates a relationship between economic factors and crime. An increase in the average annual income appears to suggest a reduction in violent crimes as well as property crimes. On a negative note, an incre ...
UNIVERSITY OF TORONTO SCARBOROUGH Department of
... W’s (Note in this question is only interested in three W’s: Who, What and Why. Please identify the choice that identifies all these three W’s correctly.) A) Who: the 10 infant car seat models; What: Overall safety rating; Why: To provide information to readers B) Who: Magazines; What: Articles; Why: ...
... W’s (Note in this question is only interested in three W’s: Who, What and Why. Please identify the choice that identifies all these three W’s correctly.) A) Who: the 10 infant car seat models; What: Overall safety rating; Why: To provide information to readers B) Who: Magazines; What: Articles; Why: ...
Types of Variables - Center for Astrostatistics
... Probability distribution of a continuous random variable: idealized curve (perhaps from a histogram) which represents probability that a value of the variable occurs as an area under the curve. Example: Discrete Random Variable. Consider observing some phenomena with exactly two possible outcomes (s ...
... Probability distribution of a continuous random variable: idealized curve (perhaps from a histogram) which represents probability that a value of the variable occurs as an area under the curve. Example: Discrete Random Variable. Consider observing some phenomena with exactly two possible outcomes (s ...
STATISTICS - SUMMARY - Michigan State University
... distinction here between the measure of association between the two variables in the sample (correlation coefficient) and the test of hypothesis that correlation is zero (making inference to the population). Regression : is multivariate extension of correlation. A linear relationship between a depen ...
... distinction here between the measure of association between the two variables in the sample (correlation coefficient) and the test of hypothesis that correlation is zero (making inference to the population). Regression : is multivariate extension of correlation. A linear relationship between a depen ...
Statistical Analysis 3: Paired t-test
... Notice that this option automatically gives you the sample summary data. The relevant results for the paired t-test are in bold. From this row observe the t statistic, t = 3.231, and p = 0.004; ie, a very small probability of this result occurring by chance, under the null hypothesis of no differenc ...
... Notice that this option automatically gives you the sample summary data. The relevant results for the paired t-test are in bold. From this row observe the t statistic, t = 3.231, and p = 0.004; ie, a very small probability of this result occurring by chance, under the null hypothesis of no differenc ...
Summarizing Data
... the alternatives to variance and when are they appropriate? How to interpret the variability? How much confidence can you put on data with a large variability? How many measurements are required to get a desired level of statistical confidence? How to summarize the results of several different workl ...
... the alternatives to variance and when are they appropriate? How to interpret the variability? How much confidence can you put on data with a large variability? How many measurements are required to get a desired level of statistical confidence? How to summarize the results of several different workl ...
STT 315 Pathak - Exam 1 - Practice Exam Solutions
... 7. D – Data from people in the sample are used to obtain information about the population All of the other answer choices, A, B, and C are incorrect because the words “sample” and “population” were swapped. ...
... 7. D – Data from people in the sample are used to obtain information about the population All of the other answer choices, A, B, and C are incorrect because the words “sample” and “population” were swapped. ...