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The personnel director of Cander Machine Products is investigating perfectionism on the job. A test designed to measure perfectionism was administered to a random sample of 18 employees. The scores ranged from 20 to about 40. One of the facets of the study involved the early background of each employee.
Did the employee come from a rural background, a small city, or a large city? The scores are in the table below.
Rural Area Small Urban Area Large Urban Area
35 28 24
30 24 28
36 25 26
38 30 30
29 32 34
34 28
31
a. At the .05 level, can you conclude there is a difference in the three mean scores?
b. If the null hypothesis is rejected, can you state that the mean score of those with a rural background is different from the score of those with a large-city background?
The mean and the standard deviation of a sample of 100 bank customer waiting times are 5.46 and 2.475 minutes, respectively. a) Assuming the distribution is bell-shaped, calculate the waiting time intervals containing 68% and 95% of bank customer w..
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
What is the appropriate procedure to test a significant difference in means between the two groups? Use the critical-value method.
Compare the mean of the sampling distribution of sample means with that of the population.
A function sometimes associated with a continuous nonnegative random variable is the failure rate (or hazard rate) function which is defined as:
For a group of 10 men subjected to a stress situation, the mean number of heartbeats per minute was 126, and the standard deviation was 4. Find the 95% confidence interval of the true mean.
Graph one shows a number of observations that all are directly on trend line that moves from the top left of the graph to the bottom right.
A coin is tossed 20 times. A person, who claims to have ESP is asked to predict the outcome of each flip in advance. She predicts correctly on 14 tosses.
Compute the score based on their appropriate class means and standard deviations:
A five-star hotel accepts 100 room reservations daily. For each reservation accepted, there is a 7% chance that the guest will not arrive.
By using.02 level of significance, carry out a 5-step hypothesis testing procedure to find out if new processes considerably reduced the wait time.
Statistics is science of conducting studies to: Solve a system of equations.
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