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Of the 261 individuals surveyed in the previous, 72% of them intentionally flirt at conferences. Derive the standard error of proportion, the margin error and the 95% confidence interval for the proportion indicating preference to flirting.
Establish a 99% confidence interval for the difference in the proportion of suburban and urban housewives who own IPod.
What sample size would be needed to obtain an error of ±10 square millimeters with 99 percent confidence?
If hypothesis test for single population variance is to be conducted by using significance level of to 0.10, a sample size of n = 16, and test is a one-tailed upper-tail test, the critical value is?
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
An ANOVA procedure is used for data that was obtained from four sample groups each comprised of five observations. The degrees of freedom for the critical value of F are:
Plan the scatter diagram
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
Find out the upper and lower bounds on average life expectancy of the Canadian women such that at least 90% of all population is included.
The management of a department store is interested in estimating the difference between the mean credit purchases of customers using the store's credit card versus those customers using a national major credit card.
Suppose the population is normally distributed they make a decision to do a hypothesis test.
Identify the type of sampling (random, systematic, convenience, stratified, cluster) used when a sample of people who smoke is obtained as described below.
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