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A study of lobster trap placement used a 95?% confidence interval to estimate the mean trap spacing? (in meters) for the population of red spiny lobster fishermen fishing in the west coast. How many teams of fisherman would need to be sampled in order to reduce the width of the confidence interval to 5 ?meters? Assume prior knowledge indicates that the trap spacing readings for the population of red spiny lobster taken during a day are approximately normally distributed with a standard deviation of 12.6 meters.
The football coach randomly selected ten players and timed how long each player took to perform a certain drill. The times (in minutes) were: 11 8 8 10 11 9 9 14 8 5 Find a 95% confidence interval for the population standard deviation Η
one of the requirements of linear regression is homoscedasticity of the residuals. this means that .a. the sizes of the
Identify a business research topic and define the research questions for the identified problem or opportunity
Survey of 8000 women, 5431 say they change their nail polish once a week. construct a 95% confidence interval for the population proportion of women who change their nail polish once a week.
assume that each vehicle passing a speed trap on i-44 between rolla and st. louis will be exceeding 90 mph with
Should the airline change the number of tickets they sell for this? flight? Explain.
find the two standard scores z that correspond to the following. enter your answers from smallest to largest. give your
The proportion of all people who are right-handed is said to be 0.88. Tell the value of standardized sample proportion z, if we want to test.
a. Test whether there is a regression relation; use = 10. State the alternatives, decision rule, and conclusion. What does your test imply about ßl ß2, and ß3? What is the P-value of the test?
suppose the prelliminary results were as follows group 1 n=310,p=32 and group 2 n=309,p=20 construct a 95% confidence interval for the difference in proportions of patients with new hair growth for the two groups using the given data.
Suppose a bookie will give you $6 for every $1 you risk if you pick the winner in 3 ballgames. For every $1 bet, you either lose $1 or gain $6. What is the bookie's expected earnings per dollar wagered?
Gerstein (1965) studied the long-term pollution of Lake Michigan and its effect on the water supply for the city of Chicago. One of the measurements considered by Gerstein was the annual number of "odor periods" over the period of years 1950-1964...
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