Confidence interval for proportion of clerical
In random sample of 150 clerical workers, 30 show an intense dislike for their jobs. Compute a 94% confidence interval for proportion of clerical workers who show an intense dislike for their jobs.
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Use E = $136 and a confidence level of 99% and known standard deviation (sigma) of = $503. Find the minimum sample size to estimate an unknown population means M.
Distance between home plate and dead center field is 417ft. Find distance from dead center field to third base. The distance between home plate and third base is given as 90ft.
The strip of ribbon is cut in 3 smaller strips in ratio 2:3:5. If shortest of three strip is 30 inches in length, determine length, in inches, of ribbon before it was cut?
Suppose that prices of certain model of new homes are normally distributed with the mean of $150,000. Find out the percentage of buyers who paid more than $154,800 if the standard deviation is $2,400
Twenty students are entitled for free after school tutoring. A simple random sample of five is selected. How many different simple random selections are possible?
A telephone answering service records length of each call. A random sample of 12 reports yields a mean length of 3.2 minutes with standard deviation of .7 minute. Compute a 95% confidence interval for the mean length of phone calls for this answer
An experiment was conducted to find out the strength of certain type of braided cord after weathering. The strengths of 56 pieces of cord which had been weathered for 30 days were investigated. The 56 pieces of cord were placed at the same time in
Is there evidence to reject the manager's claim at alpha =.01? Perform a suitable hypothesis test, showing the necessary computations and/or explaining the process employed to obtain the results.
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