Sampling distribution and hypothesis testing
... - Have mean of population (somehow) and took infinite number of samples from population. Determined: = 12 From one sample: X = 11.7 Draw the curve. What else do we need to know? x = .4 - Find z-score: Before: X - X Now: X - μ s x Z = ??? What % does this value coincide with? This also means p = ...
... - Have mean of population (somehow) and took infinite number of samples from population. Determined: = 12 From one sample: X = 11.7 Draw the curve. What else do we need to know? x = .4 - Find z-score: Before: X - X Now: X - μ s x Z = ??? What % does this value coincide with? This also means p = ...
CHAPTER NINE The Single-Sample t Test NOTE TO
... degrees of freedom in parentheses. After that, our next step is to write an equals sign and then the value of the test statistic (usually to two decimal places). Lastly, we write a comma, then we decide whether the p value associated with the test statistic was less than or greater than the cutoff p ...
... degrees of freedom in parentheses. After that, our next step is to write an equals sign and then the value of the test statistic (usually to two decimal places). Lastly, we write a comma, then we decide whether the p value associated with the test statistic was less than or greater than the cutoff p ...
Ch 15
... ••Analysis of Variance - ANOVA:• A test for the differences among the means of two or more variables. A method of testing the null hypothesis that several group means are equal in the population, by comparing the sample variance estimated from the group means to that estimated within the groups. In ...
... ••Analysis of Variance - ANOVA:• A test for the differences among the means of two or more variables. A method of testing the null hypothesis that several group means are equal in the population, by comparing the sample variance estimated from the group means to that estimated within the groups. In ...
Probability and Statistics EQT 272
... other students. The mean numbers of hours spent studying per week is 25 hours with a standard deviation of 3 hours per week. A sample of 40 Class A students was selected at random and the mean number of hours spent studying per week was found to be 26 hours. Can the teacher’s claim be accepted at 5% ...
... other students. The mean numbers of hours spent studying per week is 25 hours with a standard deviation of 3 hours per week. A sample of 40 Class A students was selected at random and the mean number of hours spent studying per week was found to be 26 hours. Can the teacher’s claim be accepted at 5% ...
USC3002_2007.Lect3&4 - Department of Mathematics
... are assertions about a population that describe some statistical properties of the population. Typically, statistical hypotheses assert that a population consists of independent samples of a random variable that has a certain type of distribution and some of the parameters that describe this distrib ...
... are assertions about a population that describe some statistical properties of the population. Typically, statistical hypotheses assert that a population consists of independent samples of a random variable that has a certain type of distribution and some of the parameters that describe this distrib ...
Lecture 19-20. - Columbia Statistics
... make a purchase. His assistant thinks his prices are too high and suggests that he gives a 5% rebate on all purchases for a two-week trial period. The owner counts the number of shoppers that enter the store and how many make a purchase, to determine if there has been a significant increase in the p ...
... make a purchase. His assistant thinks his prices are too high and suggests that he gives a 5% rebate on all purchases for a two-week trial period. The owner counts the number of shoppers that enter the store and how many make a purchase, to determine if there has been a significant increase in the p ...
STA220-Exam 3 Name: Multiple Choice worth 3 points each The
... 8. (8 points) A college freshman wants to estimate the true time it takes to have his order completed at the Subway sandwich shop on campus. He has estimated that the standard deviation for ordercompletion times is 3.3 minutes. If he wants to estimate the true average, order-completion time to with ...
... 8. (8 points) A college freshman wants to estimate the true time it takes to have his order completed at the Subway sandwich shop on campus. He has estimated that the standard deviation for ordercompletion times is 3.3 minutes. If he wants to estimate the true average, order-completion time to with ...
Hypothesis testing
... • H1: Law school admission rates were higher for those participating in a pre-law advising program. • H0:There is no difference in law school admission rates between those who participate in an advising program and those who do not. • Note: This is a one-tailed hypothesis. One mean is higher than th ...
... • H1: Law school admission rates were higher for those participating in a pre-law advising program. • H0:There is no difference in law school admission rates between those who participate in an advising program and those who do not. • Note: This is a one-tailed hypothesis. One mean is higher than th ...
