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A sample of workers found that 120 out of 200 preferred flexi-time scheduling over work at home options. In the past management has found 70% of workers preferred the flex option.
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha.
b) Explain to management what your findings are and what this suggests about future decisions vs work options.
When the non-parametric statistics utilized? Write down an example.
Determine the standard deviation of difference between Sarah's and Richard's scores?
Draw a tree diagram representing the data. What is the probability that a vehicle stolen in this city will never be recovered?
Use the Empirical Rule to estimate the proportion of costs within two standard deviations of the mean. What are these limits?
Test whether there is a difference in the mean of times men and women and determine the p-value.
Use the permutations rule to determine the total number of different ways the winners can be drawn.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
Get a test statistic and p -value. Interpret results at α = .01.
Calculate the sample mean and sample standard deviation.
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
Find out the probability that the return for common stocks will be more than 0%.
Suppose you bid $12000. What is the probability that your bid will be accepted?
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