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Question: One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month. It was revealed that they watched an average of 151 hours each month with a standard deviation of 32 hours. Assume that the underlying population distribution is normal.
1. Construct a 99% confidence interval for the population mean hours spent watching television per month.
(a) State the confidence interval,
(b) sketch the graph, and
(c) calculate the error bound.
Determine if there is any difference between the pulse rates of smokers and nonsmokers. Compute the p-value of the test. Can you draw any conclusions?
What is the decision regarding the null hypothesis (is there a difference in the mean numbers of cameras sold at the three department store chains)?
Calculate the row percentages in the table. In a few sentences, describe the relationship between type of drinker and the personal definition of binge drinking.
A study of 200 commercial firms revealed the data below. What is the probability that a particular firm will have $1 million or more in income after taxes?
according to an airline a particular flight is on time 95 of the time. suppose 17 flights are randomly selected and the
a hat contains n coins f of which are fair and b of which are biased to land heads with probability 23. a coin is drawn
However, suppose Acme can pay to change the probabilities of the national market outcomes from their current values, 0.45, 0.35, and 0.20, to the new values p.
One characteristic of billiard balls is their elasticity - the bounce they get when striking one another. A manufacturer of billiard balls is testing three additives to the basic plastic.
What are the mean and standard deviation of the number of customers exceeding their credit limits? What is the probability that 0 customers will exceed their limits? What is the probability that 1 customer will exceed his or her limit?
Your company is considering submitting a bid on a major project. You determine that the expected completion time is 100 weeks and the standard deviation is 10 weeks.
Test the null hypothesis that the unemployment rates in both cities are equal versus the alternative hypothesis that they are not equal. What is the p-value? State your conclusion.
Can you use the usual algorithms for addition and subtraction without treating zero as a number? Explain.
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