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Find the 90% confidence interval for the mean, variance, and standard deviation for the price in dollars of an adult single-day ski lift ticket. The data represent a selected sample of nationwide ski resorts. Assume the variable is normally distributed.
59 54 53 52 5139 49 46 49 48
If student is chosen at random, determine the probability that he or she is sophomore and owns a credit card.
What is the best first glance prediction you can give the customer about the value of his house given your 2 variable linear regression analysis?
The employees of a company were surveyed on questions regarding their educational background and marital status. Of the 600 employees
Find a 90% confidence interval for the mean amount left by all groups.
Suppose the assembly times follow normal distribution. Find out z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
The sum of two numbers is less then 27. The second number is 7 less then the first. What are the possible values for the first and second number
Rewrite the equation in slope-intercept form. Then identify the slope and the y-intercept of the line.
At the 5% significance level, can the researcher reject the hypothesis that the mean reading scores of all children in the three school systems is the same ? Formulate and test the appropriate hypotheses. Use the critical value approach.
What is the probability that a cereal would be high calorie, given that is low fiber? In other words, what is P (high calorie, given low fiber)?
A company adminsters an "aptitude test for managers" to aid in selecting new management trainees. Prior experience suggests that 60 percent of all applicants for management trainee positions would be successful if they were hired.
Suppose there are two samples of size 6 and 7, with a rank sum of 58 in the sample of size 6. Using the Wilcoxon rank-sum test, evaluate the significance of the results, assuming there are no ties.
Hypothesis test for one population mean - What is the alternative hypothesis and What is the null hypothesis?
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