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A city in Ontario builds a new public parking garage in its Central business district downtown, hoping to attract more shoppers downtown. The city plans to pay for the structure through parking fees. For a random sample of 44 week- days, daily fees collected averaged $12, 600. The population standard deviation for daily fees collected is known to be $1500. Assume that parking fees are approximately normally distributed
a) Find a 90% confidence interval for the mean daily income this parking garage will generate and interpret your answer. Use z- distribution.
b) The consultant who advised the city on this project predicted that parking revenues would average $12,800 per day. Test the consultants claim at a level of confidence of 5% using a z distribution.
Suppose you set both alarm clocks. What is the probability that at least one of them is successful on the morning of an important exam?
you are interested in the relation between the number of years working for a particular company and loneliness at work.
Find the average difference and its standard error for every pair of advertisements (computed as ad 2 minus ad 1, ad 1 minus ad 3, and ad 2 minus ad 3).
If the population mean for how much alumni spend is $115.50 per week eating out socially, what is the mean and standard deviation for the sampling distribution of x?
Determining the strength of a correlation is very important to determine how well one variable can predict another. To determine the strength of a correlation, we have to calculate the correlation coefficient, r.
What is the probability of getting the first questions correct and miss the fourth with five possible answers to each question?
The Average GPA is known to be 2.67 with standard deviation = 0.58. What GPA will a student need to have to be admitted to the Tech school?
The students were asked to evaluate the effectiveness of the format on an 11-point scale. What are the degrees of freedom associated with the test statistic?
To utilize the weighted least squares approach we need to know, up to a multiplicative constant, the variance of Y as a function of x. We will now present an argument that Var(Y) should be proportional to x.
Use a t test to test the claim about the population mean u at the given level of signifiance a using the given sample statistics. For each claim, assume the population is normally distributed.
What is the correlation between X and Y ? That is, calculate ?XY.
In a certain population of adults there are twice as many men as women. What is the proportion of men in the population:
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