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Assume there are 538 representatives. Use the finite population correction factor and develop your own formula for computing the answer.
Why is it important to determine an appropriate sample size and how can you determine what sample size you should use to ensure that your population mean.
He estimates the standard deviation to be 15. If he wishes to be 95% certain of having enough plants, how large a sample must he take to be within 5 plants?
Determine the probability that the sample proportion will be within ± .03 of the population proportion if a sample of size 500 is selected.
Find the appropriate minimum sample size: You want to be 95% confident that the sample variance is within 40% of the population variance.
You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You decide on the 95 percent confidence level.
If the poll is to have a 98 percent confidence interval and must be within four percentage points, how many people should be surveyed?
Five machines produce electronic components. The number of components produced per hour is normally distributed with a mean of 25 and a standard deviation of 4.
What sample size should be obtained if he wants the estimate to be within 0.02 with 90% confidence if.
Use the given claim to state a null and an alternative hypothesis. Identify which hypothesis represents the claim.
How low can you go? No, not the limbo. We re talking about how many people you'll want to include in your study. Today's research budgets are tight.
Using the data found on the OnlyTheBestDiamonds tab in FinalData.xlsx Excel spreadsheet, find the mean, median, mode and standard deviation
Ester is able to obtain $25,000 from BBAAS to conduct her survey. This will be her only source of funding.
Why is it important to determine the size of a sample precisely? What are the key points to consider when determining sample size?
Operations and production managers often use the normal distribution as a probability model to forecast demand in order to determine inventory levels
In computing sample size for estimating population proportions, the formula involves p(1-p) (where we don't know p).
Fifty samples of water effluent from a chemical processing facility were measured for a required EPA report.
A previous study of nickels showed that the standard deviation of the weight of nickels is 250 miligrams.
A previous analysis of paper boxes showed that the standard deviation of their lengths is 13 millimeters.
The average customer waiting time at a fast food restaurant has been 7.5 minutes. The customer waiting time has a normal distribution.
In order to set rates, an insurance company is trying to estimate the number of sick days that full time workers at an auto repair shop take each year.
Comment on the relative sensitivity of the minimum sample size to the actual proportion and to the desired half-width.
Use the following information for problems 1-3. Decide whether the normal sampling distribution can be used.
Toyota provides an option of a sunroof and side air bag package for its Corolla model. This package costs $1400 ($1159 invoice price).
The weight of football players in the NFL is normally distributed with a mean of 200 pounds and a standard deviation of 25 pounds.