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1-State whetherbeach othe following true or false, and explain why
A) a high negative correlation value, for example, p=-.95, means that the value of the regression line slope, beta, must be a large negative number
B)if a t-test of the hypothesis H0: p=0 versus Ha: p not equal to 0 is rejected at the alpha=0.05 level, then p cannot be a number very near zero.
2-suppose the correlation coefficient between FEV for 100 sets of identical twins is 0.7, whereas the true correlation between fraternal twin is known to be 0.38. Carry out the appropriate hypothesis test for testing the null hypothesis that the correlation between FEV values is greater among identical twins than among faternal twins.
Pierre has a utility function for total asset position of u(x)=ln(x), His assets currently consist of $50,000 in cash and a rare violin he inherited from a rich uncle which is valued at $100,000.
A thorough examination reveals there is nothing wrong with the filling machine. From a statistical standpoint, was there a "type" error made? If yes, which type? Explain.
A work-study engineer times a certain operation, and discovers that the average time it takes is 10 minutes, but on 15% of occasions it takes more than 13 minutes.
You can win $100 if you succeed in any one of the following: 1) draw a spade from a fresh deck of cards; 2) draw a heart from a fresh deck of cards; or 3) flip a fair coin and it comes up tails.
A local bank reports that 80 percent of its customers maintain a checking account, 60 percent have a savings account, and 50 percent have both.
Suppose the correlation between weight and height for adults is +.80. What proportion (or percentage) of the variability in weight can be explained by the relationship with height?
Observations was x ¯ = 119.8 (actually 119.7692), and the 14th observation, somewhat of an outlier, was 158. What is the value of x ¯ for the entire sample?
Gas station sells 1400 gallons of gasoline per hour if it charges $ 2.05 per gallon but only 1100 gallons per hour if it charges $ 2.95 per gallon. What should gasoline price be to sell 1000 gallons per hour?
The null hypothesis is the alternative is Use the given sample data to find out the P-value for the hypothesis test. Provide an interpretation of the P-value.
Should the engineering firm be concerned? Perform an appropriate hypothesis test, showing the necessary calculations and or explaining the process used to obtain the results.
Find a 95% confidence interval for the mean monthly rent for unfurnished one-bedroom apartments available for rent in this community.
The researcher computed the number of migraines individuals reported during a six-month time frame as a function of the amount of stress they reported during that same time period. There were three stress levels: low, mild, and severe.
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