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TV watchers. Students in an AP Statistics class were asked how many hours of television they watch per week (including online streaming). This sample yielded an average of 4.71 hours, with a standard deviation of 4.18 hours. Is the distribution of number of hours students watch television weekly symmetric? If not, what shape would you expect this distribution to have? Explain your reasoning.
Estimate the IQR of the tires tread life - If the dealer is only willing to give a refund to no more 2% of the customers, for what mileage can he guarantee these tires to last?
The data in the following table come from a time when the United States had a maximum speed limit of 55 miles per hour in all states.
Use the given degree of confidence and sample data to find the margin of error in estimating the population mean. Replacement times for washing machines 90% confidence; n =41 the sample mean (x-bar) =10.9 years s=2.3 years
From the following information for Alfred Industries compute the overhead spending variance and the volume variance:
Determine the probability that another random sample would lead to a sample proportion as low as or lower than the one obtained by the analyst, assuming the proportion of all mutual funds that outperformed the market is indeed 0.58.
What are the warning limits? If the turnaround time for a test is found to be 40 minutes, is the process in control? Should one consider remedial actions in this situation?
Find the probability that the number who consider themselves baseball is (a) exactly 8, (b) at least 8, &(c)less than 8.
My statistic class has 8 students 6 of them are female. In the experiment, I randomly select 4 students (without being replacement) to make a group presentation to the class. What is the probability of the following cases: What is the probability ..
Your office has just received 128 in insurance claims to be processed in the next few days. What is the probability that half or more of the claims have been padded?
fifty students are enrolled in an economics class. after the first examination a random sample of 5 papers was
Density of the earth In 1798, the English scientist Henry Cavendish measured the density of the earth several times by careful work with a torsion balance.
Then compute the probability of B in each situation (these are the P(B|An)). Finally weigh each of these probabilities with the probabilities that you are in an situation.
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