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In order to estimate the proportion of families who prefer female baby-sitters to male baby-sitters with an error of at most 8 percentage points and with at least 95 percent confidence, how large a sample should be taken?
In addition, record the values for the UCL, center line, and LCL. Also, record any points that are out of control. Use a z-value of three.
Given the following data, calculate the EMV for each investment alternative. Which is best based on the EMVs you calculated?
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
The Travel Weekly International Air Transport Association survey asked business travelers regarding the purpose for their most recent business trip.
If you arbitrarily grab 2 socks out of drawer determine the probability that you grab a matching pair?
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 20 hours, with a standard deviation of 5.5 hours
Consider the many possible distributions of grades on a quiz in a statistics class; imagine that the grades could range from 0 to 100.
Using the finite population correction factor, compute the standard error for each of the three firms given a sample of size 50.
There is sufficient evidence to support the claim that the mean speed of all cars on that section of I-10 is greater than the posted speed limit of 70 mph.
A survey conducted by the American Automobile Association showed that the family of four spends an average of $215.60 per day while on vacation. Suppose a sample of 64 families of four vacationing at Niagara Falls results in a sample mean of $252...
A supervisor has noticed that sales for all departments world wide has been averaging $12,000 a month for a number of years. For the last 18 review periods the average sales figure has dropped to $11,500 with a standard deviation of $4,000. Manage..
In a study of the consumer's view of the economy, the probability that a consumer would buy a house during the year was 0.0013, and the probability that the consumer would buy a car during the year was 0.198. There was also a 0.0100 probability t..
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