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Use of 0.05 significance level to test the claim that students taking non-proctored tests get a higher mean than those taking proctored tests (use the p-value method). Show your work. HINT: See Illowsky, Chapter 10.
Assume the sample data are simple random samples and that the differences have a distribution that is approximately normal. Test the claim that body temperature measured at 6 pm is higher than the body temperature measured at 6 am. Use a 0.10 significance level. Show your work.
prizes. They claim that they put the names of all of the students in the school in
the basket and that they randomly drew 36 names out of this basket. Of the prize
winners, 6 were freshmen, 14 were sophomores, 9 were juniors, and 7 were
seniors. The results do not seem that random to you. You think it is a little fishy
that sophomores organized the raffle and also won the most prizes. Your school is
composed of 30% freshmen, 25% sophomores, 25% juniors, and 20% seniors.
were distributed throughout the classes as would be expected based on the
percentage of students in each group. Report your Chi Square and p values.
area. A qualitative assessment of both texture and color is made with the
following results. Is there evidence of association between color and texture for
these limestones? Explain your answer.
Decide whether the following statement is true or false.
Use the following information to answer the next two exercises:
Suppose an airline claims that its flights are consistently on time with an average delay of at most 15 minutes. It claims that the average delay is so consistent that the variance is no more than 150 minutes. Doubting the consistency part of the claim, a disgruntled traveler calculates the delays for his next 25 flights. The average delay for those 25 flights is 22 minutes with a standard deviation of 15 minutes.
Use the following information to answer the next exercise. The cost of a leading liquid laundry detergent in different sizes is given in Table 12.31.
An initial survey was performed right after Médecins Sans Frontières accused my brother of wrong doing.  Of 1852 customers, 53 were against the aggressive tactics of Médecins Sans Frontières.  After my brother was cleared by the court, a follow-up survey was performed.  Of 4699 customers, 1751 said they did not agree with the aggressive tactics of Médecins Sans Frontières.
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