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You are given the choice of three doors. Behind one is a new car and the others hide a barnyard animal for you to keep. After you choose door number one, your host (Monty) opens door three to reveal a goat. He then asks you if you would like to switch to door two. Has the probability of success gone from 1/3 to 1/2 and then should you switch?
Why might supposition of normal population be doubtful? Problem arises when?
A random-effects ANOVA refers to the analysis where the levels included in the study represent a random sample of all levels that exist.
Create raw score predictions on criterion variable for persons with Z scores on predictor value of -2,-1,0,+1,+2.
Many people think that job satisfaction in workplace is directly related to annual income. To check the validity of this assumption survey of 430 active working adults in U.S was taken that relates their job satisfaction to their annual income.
Beta and required rate of return stock has required return of 11%; risk-free rate is 7%t; and market risk premium is 4 %. Determine the stock's beta?
In regression equation, the value of y-intercept indicates the value of Y when the value of X is zero.
Estimating confidence interval for mean value of y and find a 95% confidence interval for the expected average total sleep time for a child of age 12
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
A retailer wants to estimate with 99% confidence the number of people who buy at his store. A previous study showed that 15% of those interviewed had shopped at his store.
A consumer organization wants to know whether there is a difference in the price of a particular toy at three different types of stores.The price of the toy was checked in a sample of five discount stores, five variety stores, and five department ..
The lifetime of a color television picture tube is normally distributed with the mean of 7.8 years and a standard deviation of 3 years.
Using the p-value approach, test the hypotheses at the 1% level of significance.
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