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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.
Determine percent of the garages take between 29 hours and 34 hours to erect? Determine percent of garages take 28.7 hours or less to erect?
Is there evidence of a difference in objection to sharing information among the organizational groupings? (use α = 0.05)
Determine the expected shape of distribution of sample mean? Compute the likelihood of choosing a sample with mean of at least $112,000?
The ANOVA table is given below,as well as a table of means and standard deviations for the three groups. Evaluate the t statistic for testing contrast
Describe the data appear the strength of the relationship among variables is sufficient to warrant using linear regression forecasting.
In past, mean processing time was 45 days. At 0.05 level of significance, is there evidence that mean processing time has changed from 45 days?
Which of the following is true about the expected value of perfect information. It is the amount you would pay for any sample study.
In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken.
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
A radio station wants to know if residents in their area are in favor of a proposed tax increase. They invite listeners to call in to respond to the poll. 645 of the 800 who responded were against the tax.
Find a 90% confidence interval for the difference between the proportion of men and the proportion of women who approved of Reagan's performance. What assumption do you make to use this method?
Determine the probability of randomly selecting a person graduating with Master's degree who didn't major in Education.
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