solution - Sergio Turner
... (b) Following slide 17, ch3 use this formula for the standard error: SE=(p^ (1-p^ )/n)½ . SE = (.5375*.4625/400)½ = 0.02493 (c) What is the p-value for the test H0:p=.5, H1:p≠.5 , given this sample? Interpret this number. The p-value is defined in terms of the t-statistic t = (.5375-.5)/.02493 = 1.5 ...
... (b) Following slide 17, ch3 use this formula for the standard error: SE=(p^ (1-p^ )/n)½ . SE = (.5375*.4625/400)½ = 0.02493 (c) What is the p-value for the test H0:p=.5, H1:p≠.5 , given this sample? Interpret this number. The p-value is defined in terms of the t-statistic t = (.5375-.5)/.02493 = 1.5 ...
10.2a Comparing Two Means
... Calcium is a little irregular but this is not unusual for a small sample. ...
... Calcium is a little irregular but this is not unusual for a small sample. ...
M116 Elements of Statistics - Web4students
... b) Construct and label a box plot of the data. You can use your calculator for this one. Please transfer a NEAT graph to this paper. List the 5-number summary. c) Construct a frequency table with 4 classes using the smallest number as the lower limit of the first class. Show how you find the class w ...
... b) Construct and label a box plot of the data. You can use your calculator for this one. Please transfer a NEAT graph to this paper. List the 5-number summary. c) Construct a frequency table with 4 classes using the smallest number as the lower limit of the first class. Show how you find the class w ...
ENGG2430A-Homework 5
... which is just slightly wider than the large-sample confidence interval above. This is because the t-distribution with a large degrees of freedom is a approximately a standard normal gaussian distribution. The variance of the t-distribution is also slightly larger than 1 and so the distribution is a ...
... which is just slightly wider than the large-sample confidence interval above. This is because the t-distribution with a large degrees of freedom is a approximately a standard normal gaussian distribution. The variance of the t-distribution is also slightly larger than 1 and so the distribution is a ...
inference_steps - the Department of Statistics Online Learning!
... true mean GPA difference between males and females” or “Estimate the true mean GPA difference between males and females” we would calculate a confidence interval. However, if the question states a current parameter exists and we disagree with this value or we want to demonstrate statistically that t ...
... true mean GPA difference between males and females” or “Estimate the true mean GPA difference between males and females” we would calculate a confidence interval. However, if the question states a current parameter exists and we disagree with this value or we want to demonstrate statistically that t ...
Hypothesis Testing
... variable X with an unknown distribution PX . To proceed with modelling the underlying population, we might hypothesise probability models for PX and then test whether such hypotheses seem plausible in light of the realised data x = ( x1 , . . . , xn ). Or, more specifically, we might fix upon a para ...
... variable X with an unknown distribution PX . To proceed with modelling the underlying population, we might hypothesise probability models for PX and then test whether such hypotheses seem plausible in light of the realised data x = ( x1 , . . . , xn ). Or, more specifically, we might fix upon a para ...
Introduction to Statistical Tests
... The only way to guarantee that neither type of error will occur is to make such decisions on the basis of a census of the entire population. The risk of error is introduced when we try to make an inference on a sample. Definition: The probability of a type I error is denoted by α and is called the l ...
... The only way to guarantee that neither type of error will occur is to make such decisions on the basis of a census of the entire population. The risk of error is introduced when we try to make an inference on a sample. Definition: The probability of a type I error is denoted by α and is called the l ...
STAT 103 Sample Questions for the Final Exam
... 11. A company that owns and services a fleet of cars for its sales force has found that the service lifetime of disc brake pads varies from car to car according to a normal distribution with mean of 43,000 miles and standard deviation of 4,500 miles. A new and cheaper brand of brake pads is installe ...
... 11. A company that owns and services a fleet of cars for its sales force has found that the service lifetime of disc brake pads varies from car to car according to a normal distribution with mean of 43,000 miles and standard deviation of 4,500 miles. A new and cheaper brand of brake pads is installe ...
(02): Introduction to Statistical Methods
... 2. Take a thumbtack and drop it on a flat table. It either lands with its point up or else it lands on its side with its point touching the table. Do this 50 times. A group of Grade 6 students claimed that half of the time the thumbtack lies with its point up. Determine, at the 95% confidence level, ...
... 2. Take a thumbtack and drop it on a flat table. It either lands with its point up or else it lands on its side with its point touching the table. Do this 50 times. A group of Grade 6 students claimed that half of the time the thumbtack lies with its point up. Determine, at the 95% confidence level, ...