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Q1) Sample size of 31 is utilized to test Ho:u=50 vs Ha:u is not equal 50
Given mean x=48.2 and std=5.1
i) Determine the calculated value of the test statistic?
ii) What distribution does test statistic have when null hypothesis is true?
iii) Is alternative hypothesis one-tailed or two-tailed?
iv) What is the p-value?
Q2) Researcher is interested in evaluating noise levels in decibels at area urban hospitals. She wishes to be 99% confident that her estimate is right. If standard deviation is 4.8, how large a sample is required to get desired information to be correct within 0.60 decibels? Illustrate all work.
With this important detail, are there any significant differences with LSD?
P-value to test hypotheses,
Using a 1% level of significance, can the hypothesis that the distributions for the student's scores are identical be accepted?
Caselet on McDonald’s vs. Burger King - Waiting time
If level of significance ( α ) is 0.005 in two-tail test, how large is non rejection region under curve of the t distribution?
Use value you found in part a to find out degree of confidence for interval 65.65
Determine whether or not the mean waiting time of all customers is significantly more than 3 minutes.
The paired data below consist of the test scores of 6 randomly selected students and the number of hours they studied for the test.
There are two telephone lines A and B. Let E1 be the event that line A is being used and E2 be the event that line B is being used
Since she is allowed to reserve one time if her first serve is out what should her serving strategy be?
Survey on What do you think is the biggest problem facing education today. One problem with exit polls may be that the wrong "key precincts" were chosen.
The researchers planned to use simple linear regression to see if the age at which a baby was first able to crawl could be predicted from the average outdoor temperature six months after each baby's birthdate.
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