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You volunteer some of your spare time to your local fire department and have been asked by an assistant chief to analyze data on firefighters who applied for promotion. The assistant chief wants to ensure that gender bias is not a concern in the promotion of firefighters. Shown below is data for 50 firefighters who applied for promotion and the results of a chi-square analysis of the data.
Male Female
Promoted 13 22
Not Promoted 10 5
Chi-Square Statistics 3.6845
PValue 0.054919
An elevator starts at the basement with 8 people (not including the elevator operator) and discharges them all by the time it reaches the top floor, number 6.
A random sampe of 60 teenagers is drawn find the probability that the proportion of teenagers in the sample who play games is less than 0.489
Suppose next that the people are carrying things and that the weight of these for an individual of weight X pounds, is approximately normal with mean 0.05X.
the amount of time in minutes devuted to commercials on a tv channel during any half-hour program is a random variable
Design an experiment that would examine the research question ‘does time of day affect employee productivity?' Draw a diagram to illustrate your design. Share your designs and justifications for the design around the class.
Presume that you are considered an expert in the area of survey construction and administration.
Assuming that this was a sample from a larger population of heart attack patients, what symbols should be used to represent the values given for the mean and standard deviation?
a. Determine the least-squares regression equation for y as a function of x, then estimate y if the average mortgage rate is x = 8.0%. b. What percentage of the variation in affordability (y) is explained by the average mortgage rate (x..
A breakdown of the responses is shown in the accompanying table. Is there evidence at the 10% level to infer that the responses differ among the three groups of employees?
The rivet manufacturer's advertising agency, which has already made the "at least 3000 pounds" claim in national ads.
a delegation of 3 is selected from a city council made up of 4 liberals and 5 conservatives. what is the expected
Suppose local monthly cell phone bills are normally distributed with a standard deviation $12. What is the probability that a randomly selected cell phone bill is between $30 and $55?
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