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In a survey of 1,040 adults conducted by American Express Incentive Services, 593 responded that they would prefer being given $100 rather than a day off from work. At a 5% level of significance, is there enough evidence from this survey to conclude that more than half of all adults would rather have $100 than a day off?
LSAT scores are normally distributed, with a mean of 150 and s = 10.
What sample size should be chosen so that there is 0.95 probability of estimating the mean monthly income in $150 or less?
The City Transit Authority plans to hire 8 new bus drivers. From the group of 100 qualified applicants, of whom 55 are men and 45 are women, 8 names are to be selected by lot. Suppose that Mary and John Lewis are among the 100 qualified applicants..
Compute the probability of seven consecutive points falling above the centerline given a stable process. Is this probability associated with type I or type II error?
What is the probability that a student who has failed the test came from the South District?
Why do we have so many several measures of central tendency? Are all really essential or do they essentially give same information?
A pediatrician is interested in studying the effect of Motrin on reducing temperature in young children. Four children with influenza have their temperatures taken immediately before and then 20 minutes after taking a standard dose
Prepare an ANOVA table and test the null hypothesis of no linear relationship between the two variables.
Identify the independent and dependent variables. Perform a regression analysis on the data.
how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?
For such groups of 800, would it be unusual to get 687 consumers who recognize the Dull Computer Company name?
write down the hypothesis the test used the p-value and the interpretation then hand calculates a 95% CL for the odds ratio estimate on this last test.
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