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A survey is being planned to determine the mean amount of time corporation executives watch television. A pilot survey indicated that the mean time per week is 18 hours, with a standard deviation of 5.0 hours. It is desired to estimate the mean viewing time within one-quarter hour. The 95% level of confidence is to be used.
How many executives should be surveyed? (Round your z-score to 2 decimal places and round your final answer to the next whole number.)
abc manufacturing has 8 machines that perform a particular task. breakdowns occur frequently for this machine. past
the mean television viewing for americans is 15 hour per week monday november 2003. suppose a sample of 80 americans is
lakewood fashions must decide how many lots of assorted ski wear to order for its 3 stores. Information on pricing, sales and inventory costs has led to the following payoff table. what decision should be made using minimax regret.
Scientist would like to know if mental health clients of private versus public service agencies differ on Global Assessment of Functioning (GAF) scores and on Satisfaction with Services (Satisfaction). She has collected data for 34 clients from a ..
Write the following phrase using symbols. 4 times the sum of m and q. Elaine was charged $195 interest for 1 month on a $1000 credit card balance. What was the monthly interest rate
Multiple choice questions based on F-distribution.
The sample size n , the sample means, and the sample standard deviations for the two groups are given below.
If the speed of lights is 3.00x 10 to the power of 8 m/sec, how long does it take light to travel 2.29x 10 to the power of 11 m, the distance from the sun to Mars? Round to one decimal place.
Do time series models rely heavily on cause and effect relationships between variables in order to ensure accurate predictions?
The standard deviation of the distribution of means of change scores is 2.0 and the mean change score for the sample studied is an increase of 5.2. What is the t score?
Use the odds for each group to compute the relative odds of Group B to Group A. How does this number compare to the result in Question #7. Does this make sense?
Three dessert packages to choose from. In how many different ways could the couple select an appetizer package, a main course,and a dessert package?
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