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Certain population has the mean of 460 and standard deviation of 36. Several samples of size 56 are randomly selected and means computed. What value would you expect to determine for standard deviation of all these sample means?
The mean salary of the nine employees of a small business is $52,000 per year. One employee, whose salary was $68,000, was red. Two new employees, who will each be paid a salary of $40,000, are hired. What is the new mean annual salary of the emp..
Here are fifty observations on the weight of tea bags. Calculate the Standard Deviation and Variance.
How many subjects would you approximately need to reduce the length of the 95% confidence interval to 2 units?
What are the predictor and response variables? Make a scatterplot of the data and find r to see if a linear pattern seems to exist. If it appears to have a linear relationship, find the regression line. Dont forget to state what r is, and interpret..
A personality psychologist conducts a study to examine the relationship between extraversion and the number of siblings in a household.
Use this sample information to develop a 99% confidence interval for the population proportion of women who wear flats to work.
Do these scores suggest that the different foods are differentially preferred by people in general? (Use the .05 significance level.)
Perform the trend analysis of Pf with incrementally increasing number of the simulation cycles, and calculate the statistical uncertainty in the estimate expressed as the coefficient of variation.
Suppose standard deviation stays same, how much do you have to decrease your average production time so that 95% of time you can deliver product in under 75 hours?
Explain how much should the airport authority be willing to pay for perfect information about the success of a brand new airport.
Find out the confidence interval for the population mean also interpret the result. A researcher is interested in whether social assertiveness might be influenced by training procedures.
You are estimating the install hours for an electronics upgrade based on the number of components affected. The upgrade for which you are estimating affects 25 components. Given the following equation, select the correct response from each pair.
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