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Briefly explain how increasing sample size influences each of the following. Assume that all other factors are held constant.
a. the size of the z-score in a hypothesis test.
b. The size of Cohen's d.
c. The power of a hypothesis test.
Determine the correlation coefficient. Is there a strong relationship? If so determine the line of best fit. Estimate what the sales should be for a 3000 square foot shop.
suppose the lifetime of a particular appliance follows an exponential distribution with a mean of 10 years. what is the
suppose ben records the noon temperature in new york city on every day in the month of june and frank records the noon
Find that 116 plan to renew their subscriptions. Use (a=0.01). p = the population of subscribers to Golf Illustrated who renew. Calculate the p-value.
Assume that the result is a sample size beyond what you can obtain. Use the compromise function to compute alpha and beta for a sample approximately half the size.
An unknown distribution has a mean of 80 and a standard deviation of 12. A sample size of 95 is drawn randomly from the population.
in a class of 50 students the result of a particular examination is a true mean of 70 and a true variance of 12. it is
Interpret this data using regression and interpret all the findings, R 2 , F, IV coefficient, and the intercept.
Access to the internet to gather population data from the U.S. Census Bureau's website and do a brief keyword search on "Benford's Law" and /or "first digit phenomenon".
From this data set, obtain the corresponding values for Y de?ned as the product Y = X1 X2 . According to the result stated and proved in (i), what is the theoretical distribution of Y? Con?rm that the computed sample data set for Y agrees with this p..
a bank wishes to estimate the mean credit card balance owed by its customers. the population standard deviation is
1.a study was conducted to explore the relation between alcohol consumption and hypertension. 7400 nurses were surveyed
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