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Using the same data set (Chapter 11 Data Set 1), test the research hypothesis at the .01 level of significance that there is a difference between boys and girls in the number of times they raise their hands in class. Do this practice problem by hand using a calculator. You use the same data for this problem as for Question 1, but you have a different hypothesis (one is directional and the other is non-directional). What is your conclusion regarding the research hypothesis? How do the results differ, and why?
For the events A and B, if (A∩B)' =S (where S, of course, is the sample space), then the events CANNOT be mutually exclusive.??b. In a confidence interval for the difference between n matched pairs of observations, the t-distribution to use is with 2..
Estimate the Cobb-Douglas cost function. Interpret your coe?cients (discuss the sign, significance and magnitude of each slope coefficient). Write down the null hypothesis corresponding to the statement that input prices have no e?ect on costs
A lacrosse team is selecting a captain. The names of all the seniors are put into a hat, and the first three that are drawn will be the captains.
Adult US women are known to have cholesterol levels that are N(189 mg/dL, 25 mg/dL). What % of US women would you expect to have cholesterol levels below 135?
find the 95 confidence interval for the difference between two means based on this information about two samples.
The Lucky Lovers discount at the Quiet Nook averages $5.83 with a standard deviation of $8.62. Just up the street, the Wise Fool restaurant has a competing.
what is the coefficient of determination? if an r0.8 what is the coefficient of
The random variable X is uniformly distributed on (-1, 2) . Derive the pdf of Y = X2.
Let X1 and X2 have a bivariate Gaussian PDF with correlation coefficient ρ12 such that each Xi is a Gaussian (µi, σi) random variable. Show that Y = X1X2 has variance
Give the Z- score cutoff (or cutoffs) on the comparison distribution at which the null hypothesis should be rejected
A study is conducted to determine if the traffic light patterns at a busy intersection need to be adjusted to help the flow of traffic. Data on the volume of traffic and the traffic patterns during different times of day are recorded.
Complete the procedure on each of 36 occasions. Assuming we wich to be 99% certain of avoiding a Type I error, use these data to evaluate the union's claim.
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