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You are interested in on-the-job anxiety among police officers and want to empirically test if the shift they work influences their anxiety. You hypothesize that there is a difference in anxiety on the job between police officers who work FIRST shift and police officers who work THIRD shift. You collect data from a large random sample of officers from both shifts. You find that the average on-the-job anxiety for officers who work FIRST shift is 12.8 (std dev = 2.76), whereas the average for officers who work THIRD shift is 8.8 (std dev = 2.85). Your obtained value is 12.461. The critical t value is 1.97 at the .05 level of significance. You decide to:
a. Reject the null hypothesis that there is no difference between the on-the-job anxiety of FIRST and THIRD shift police officers based on a one-tailed negative test.
b. Reject the null hypothesis that there is no difference between the on-the-job anxiety of FIRST and THIRD shift police officers based on a one-tailed positive test.
c. Reject the null hypothesis that there is no difference between the on-the-job anxiety of FIRST and THIRD shift police officers based on a two-tailed nondirectional hypothesis. d.Fail to reject the null hypothesis that there is no difference between the on-the-job anxiety of FIRST and THIRD shift police officers based on a two-tailed nondirectional test.
Refer to Questionnaire color Problem 16.8 Explain how you would make the random assignments of supermarket parking lots to color in this single-factor study. Make all appropriate randomizations.
In 2007, Starbucks inaugurated its Dulce de Leche Latte.14 If 8% of all customers who walk in order the new drink, what is the probability that out of 13 people, at least 1 will order a Dulce de Leche Latte?
one article describes measurements of ammonium concentrations in mgl at a large number of wells in the state of iowa.
A grocery store manager discovers that on any given weekend 70% of the customers sales amount to more than $100. What is the probability that the first 2 sales will be over $100?
we wish to test the null hypothesis the average amount of fat content in all single servings of vivolis hazelnut gelati
If the market research gave a positive indication the price would be £35,000. If the market research gave a negative indication the price would be only £3,000.
Assume σ = 365 and use a = 0.05. Is there any evidence to suggest that the true mean runway length needed for takeoff of an Airbus A350-900 is greater than 8000 feet? Use the p value to draw a conclusion.
Do your work in Excel with a chart showing the break even point between lease or buy, save and submit your Excel file as Assignment 7+your last name.
Determine the mean, median, and standard deviation. Determine the first and third quartiles. Develop a box plot. Are there any outliers? Organize the distribution of funds into a frequency distribution.
The events are defined as follows: Let A be the event that the player selected has a number from 1 to 8. Let B be the event that the player selected is a guard. Let C be the event that the player selected is a forward. Let D be the event that the pla..
The Sony corporation produces a Walkman that requires two AA Batteries. The mean life of these batteries in this product is 35.0 hours. The distribtion of the battery lives closely follows the normal probability distribtion with a standard deviati..
If the airline industry proudly announces that it has set a new record for the longest period of safe flights, would you be reluctant to fly? Are the airlines due to have a crash?
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