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Eleanor scores 629 on the mathematics part of the SAT. The distribution of SAT math scores in recent years has been Normal with mean 539 and standard deviation 109. Gerald takes the ACT mathematics test and scores 23. ACT math scores are Normally distributed with mean 22.4 and standard deviation 4.2. Find the standardized scores for both students.
Eleanor's standardized score (± 0.01)?
Gerald's standardized score (± 0.01)?
Find the test statistic value for testing the equality of population means of the two samples.
Perform a posthoc test that is suitable if we assume that group 7 is a control group and that the other are different treatment groups and that we are only interested in finding significant treatments, not to compare them.
What is the appropriate inferential statistical test for the case scenario? Why?
What critical value should the company officials use to determine the rejection region?
Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.'
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
The Manager of a seafood restaurant was asked to establish a pricing policy on lobster dinners. Experimenting with prices produced the following data:
A study of 200 apples trees showed that the average number of apples per tree was 1000. The standard deviation of the population is 200. Which of the following is the 98% confidence interval for the mean number for all apples.
Assume that the average person in America weighs 150 pounds (μ). You want to determine whether colleges students weigh less than the average America, Following are the weights collected on a sample of colleges students: 120, 105, 166, 170, 145, 14..
Determine the number of successes suggested by the given statement.
What does null hypothesis for repeated-measures hypothesis test state?
Suppose the probability of the worst-case scenario increases Compute the expected value of perfect information
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