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"Did you get your 8 hours of sleep last night? In a recent survey of 151 postpartum women, the folks at the National Sleep Foundation found that the mean sleep time was 7.8 hours, with a standard deviation of 1.4 hours. Does the evidence suggest that postpartum women do not get enough sleep? Use =0.05 level of significance. How is the problem set up using the classical and P-value approach?
In his report to the mall management, can he say that shoplifting is twice as likely to be the cause of the loss as compared with either employee theft or poor inventory control and that employee theft and poor inventory control are equally likely..
What is the value of the population mean? What is the best estimate of this value?
An investor wants to assess at confidence level of 98% if a medicament can improve the marks of students. He notices that for the following daily dozes: 2,2.5,3,4.5,7 mg, the improvement over the students that studied the same but took no mental b..
Given that the mean of 100 observations is 42.5 and that their standard deviation is 6.313, find the sum of the squares of the observations.
Calculate the suitable mean response time from both proposed locations and find out which proposed site must be selected for the new emergency facility.
Given that the exam has a mean of 1000 and a standard deviation of 200, what is the lowest possible score a student needs to qualify for acceptance into the JB University?
Perform an appropriate hypothesis test, showing the necessary calculations and/or explaining the process used to obtain the results.
Jill wants to do her MBA in Statistics at a B.C. university. She applies to two universities that offer post-graduate degrees in Statistics.
Assuming these data are from two independent groups, calculate dfX, dfY, and dftotal for the data above. Determine the critical values for t based on the df you calculated for the question above, assuming a two-tailed test with a p level of 0.05.
When the p-value is used for hypothesis testing, the null hypothesis is rejected if
Ask them if they would be comfortable with a woman asking them out for a date. If the claim made by the study was true, what is the probability that: At most 4 men would say no?
Any value which is based on having measured a sample is called:
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