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Q1) According to Center for Work-Life Policy, a survey of 500 highly educated women who left careers for family reasons found 66% wanted to return to work. Create a 95% confidence interval for proportion of highly educated women who left careers for family reasons and who wish to return to work.
Q2) Commissioner of MLB baseball would like to evaluate diameter of baseballs which are used in league play and now in World Series. Manufacturer has specified that baseballs are supposed to have population mean diameter of 7.30 inches and standard deviation equal to .04 inches. Random sample of 25 baseballs chosen from a shipment indicates a sample average of 7.31 inches. Construct a 95% confidence interval estimate of the true average diameter of baseballs in this shipment. Does population of baseballs need to have diameter that is normally distributed here?
Describe what you find then produce an ANOVA for the problem.
Compute the variance and standard deviation
If there is relationship between parental income and SAT score, why can't we bring to a close that differences in score are caused by differences in parental income.
The grade point averages for 10 randomly selected high school students are listed below. Assume the grade point averages are normally distributed.
Calculate a 99% confidence interval for the true mean difference between pretreatment and after treatment testosterone levels of young male TBI patients.
Test for single mean - What do you conclude - Compute z and P
As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.
Use the continuity correction and describe the region of normal curve that corresponds to the indicated binomial probability. The probability of more than 50 right answers.
If the mean times for both George and Julia are actually the same, what is the probability that George will be let go?
Scores on the Math Achievement Test form a normal distribution with a mean of u = 300 and a standard deviation of a = 100. What score separates the top 10% of the distribution from the rest.
All else being equal, what occurs to your confidence interval when you increase value of alpha?
Probability based on normal distribution. Suppose among X has a normal distribution, and find the indicated probability.
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