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Hoping to lure more shoppers downtown, a city builds a new public parking garage in the central business district. The city plans to pay for the structure through parking fees. During a 2 month period (44 weekends), daily fees collected averaged $126, with a standard deviation of $15.
(a). What assumptions must you make in order to use these statistics for inference?(b). Write a 90% confidence interval for the mean daily income this parking garage will generate.
(c). Explain in context what this confidence interval means.(d). Explain what "90% confidence" means in this context.
Sketch the normal curve and shade the area under the curve that is the answer to the question do this on scratch paper and provide a one-sentence description for the assignment.
Write the null and alternative hypotheses. You want to see if the number of minutes cell phone users use each month has changed from its mean of 120 minutes 2 years ago.
The hypothesis that the samples came from identical populations cannot be rejected, the T value is 16.5 greater that the lower limit.
A sample of 1545 men and an independent sample of 1691 women were used to compare the amount of housework done by men and women in dual-earner marriages.
Assume that a set of test scores is normallyh distributed with a mean of 110 and a standard deviation of 25. Use the 68-95-99.7 rule to find the following quantities. the percentage of scores less than 110 is %.
What is the z score for a cd player will break down during the guarantee period of 2 years? The statement that the cd player breaks during the 2-year.
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The machine will stop working if more than three components fail. Find the probability that the machine will be working.
To find out whether two categorical variables are independent, one should use the.
Select the variable team salary and find the mean, median, and the standard deviation
Asian Americans and Pacific Islanders belong to a single Asian American culture, what do you say to them to convince them both statements are misconceptions?
He measures the heights of 25 men from this century and finds the mean and standard deviation for his sample.
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