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Q1) "Average" Martian has IQ of 120 and standard deviation of 10. If average IQ was increased to 140 by use of new technology, but standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
Q2) Weights of professional baseball players follow normal distribution with mean of 195 pounds and standard deviation of 22 pounds. Determine probability that randomly chosen professional baseball player weighs more than 250 pounds. Compute your answer to 4 decimal places.
Q3) Random sample of 150 third grade classes had mean class size of 34.1 students with SD of 2.9 students. Determine the margin of error associated with a 99% confidence interval for mean class size for all third grades. Compute your answer to 2 decimal places.
He would like to determine whether there are more units produced on the afternoon shift than on the day shift.
The chi-square goodness of fit test can be used when we:
Plot a scatter diagram of the results with Depth of Water as the independent variable.
The null hypothesis is that there was no change in average liquor consumption. State this formally in terms of µ.
Assume that the length X in minutes of a regular season NBA game is normally Distributed with X~N (µ X , σ 2 X );
Assume you choose 20 houses at random. On average, how many houses of twenty would you expect to have DVD? Determine standard deviation of number of houses with DVD?
The mean amount of time a (unnamed) computer server is down is 18.3 minutes with a standard deviation of 5.7 minutes.
Write down the name of 4 parts of the regression equation.
The CEO of the business has nothing better to do wheras measured the temperatures of 26 department managers 1 to 4 times every day to get a total of 123 measurements.
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
Consider the following estimated regression equation, based on 10 observations.
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