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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.
The file called Welco contains a random sample of logs of various diameters and the potential value of the finished products that could be developed.
create a bid to build a wall
Produce a relative frequency histogram for these data. Does it seem plausible the data were sampled from a population that was normally distributed?
One of the retail industry s biggest frustrations is customers who abuse the return and exchange policies.
The application envelopes at random looking for 10 applicants with GRE scores over 600. How many envelopes do you think the staff will need to open?
a random sample of 16 students from the student body of a large university had an average age of 25 years and a sample
To find the equation of the line of the best fit
What is probability that sample mean diameter for the 35 columns will be between 8.2 and 8.4 inches?- Suppose the standard deviation is 0.15 inch.
A qualitative assessment of both texture and color is made with the following results.
Draft a research proposal for my project management. Choose any topic that you may think of. It should be 10-13 pages and there should be scholarly references included. Include any idea and this should only come from reliable sources and not inte..
Run a proper regression analysis considering the distribution of an outcome variable with three blocks of predictors
Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
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