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The article "Why We Fall for This" (AARP Magazine, May/June 2011) described a study in which a business professor divided his class into two groups. He showed students a mug and then asked students in one of the groups how much they would pay for the mug. Students in the other group were asked how much they would sell the mug for if it belonged to them. Surprisingly, the average value assigned to the mug was quite different for the two groups! Indicate whether the study is an observational study or an experiment. Give a brief explanation for your choice.
Explain how the null hypothesis is the basis of this calculation. Determine the value of the relevent test statistic and the corresponding p-value.
The campaign staff legislator wants to determine whether the legislators performance rating (0-100) has increased from last year to this year. the legislature performance ratings from the same 16 randomly selected voters are recorded for last year..
Assuming 95% confidence, what is the recommended sample size if the desired margin of error is 1,000 miles? Would it be reasonable to obtain this sample size? Why/why not?
Suppose a person offering hot-air balloon rides charges $50 for each ride of at least 1 hour, and $1.00 for every minute after 1 hour. What proportion of rides costs more than $100?
Why do a null and alternative hypothesis have to be mutually exclusive? When would you accept the null hypothesis? Can you give an example of this?
A lending institution supplied the following data on loan approvals by four loan officers. Conduct an appropriate Hypothesis test to determine whether the loan approval decision is independent of the loan officer reviewing the loan application.
What's the probability that the customer is currently an undergraduate? Which rule of probability did you use to find the answer?
Do the thinner cans appear to be strong enough so that they are not crushed when the top lids are pressed onto the sides?
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
effect of different diet programs on weight loss in an attempt to improve the fitness of a companys pilots with the
Define a relation in A as follows: If (m1, n1) and (m2, n2) are elements in A, then (m1, n1) if m1,n2 = n1,m2. Show that is an equivalence relation and describe its equivalence classes.
Confirm that the standard deviation for sample proportions is largest when the proportion used to calculate it is .50. Do this by using other values.
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