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Looking at research conducted comparing salaries of state employees from city employees.
a. should a t - test be used and why.
b. develop a null hypothesis and research hypothesis in which you would use a t test for analysis
c. conduct a t test alpha lvl = .05 and determine the t statistic is much greater than the valude reported in the probability tables. should you reject the null hypothesis and why.
A local group claims that the police issue more than 60 speeding tickets a day in their area.
Ssample by constructing a histogram and finding the sample mean and standard deviation, are we investigating the sampling distribution of the mean? why or why not?
a random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is
Inmates who are in the state facility and 9 who have legal satisfaction scores of 5 or more. How do determine the probability for this because I have come up weird numbers.
Think about a density curve that consists of two line segments. The first goes from the point (0, 1) to the point (0.7, 1). The second goes from (0.7, 1) to (0.9, 2) in the xy-plane. What percent of observations fall below 0.70?
Develop a model that determines your round-trip gasoline cost. What assumption or approximations are necessary to treat this model as deterministic model?
Do you think an F-ratio of 1 would lead you to conclude that there is no treatment effect? Why? Justify your answers with examples.
Create the box plot to represent data. Explain the distribution. Ensure to recognize the first and third quartiles and median.
The exercise problem the following information to figure prevalence and incidence rate:
How large would an SRS of American adults need to be in order for it to be safe to assume that the sampling distribution of X is approximately Normal?
Our customers expect a call to be completed in 22 minutes. Using the data above, does either of our call centers meet this expectation with an alpha level of 0.05?
question consider the nypd case. assume the managers decide to devise a performance metric that considers the i
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