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The SAT scores of students are normally distributed with a mean of 950 and a standard deviation of 200
a. Nancy Bright's SAT score was 1390. What percentage of students have scores more than Nancy Bright?b. What percentage of students score between 1100 and 1200?c. What are the minimum and the maximum values of the middle 87.4% of the scores?d. There were 165 students who scored above 1432. How many students took the SAT?
Calculate a value of lambda using the data from last week concerning the news networks and the reporting practices. Compare your resulting lambda to the resulting chi-square from last week.
Incomes in the thousands of dollars were sampled in one region, they are as follows (1.5, 3.0, 4.2, 5.6, 2.6, 4.1, 0.9, 5.7, 5.4, 2.6) Assume the population is normal.
A shoe salesman want to see if his female customers have a preference in the color of shoe purchased. What is the test value for the following data?
What statistical procedure was used to analyze data in study B?
The world record time (in minutes) in the marathon is plotted versus the year in which the record was set for men and women separately. The plotting symbol o is used for men and x for women. The data include only records set between 1908 and 1988.
What are the main drivers of uk banks' profitability? what are the implications of increased concentration in the uk banking market? what were the main recommendations of the cruickshank report and how did the industry respond?
Now he wants to know if there is a difference between the three formats. Is there?
Create a 95% confidence interval for population mean. Is it sensible that population mean is 28 weeks? give explanation for your answer.
In an online survey of 4,001 respondents, 8% were classified as productivity enhancers who are comfortable with technology and use the Internet for its practical value (data extracted from M. Himowitz, "How to Tell What Kind of Tech User You Are,"..
One item on a questionnaire asks, "How many siblings (brothers and sisters) did you have when you were a child?" A researcher computes the mean, the median, and the mode for a set.
Salary data for a sample of 50 universities were obtained. We are curious about the relationship between mean salaries for assistant professors.
A ten year old survey found that the average income of sole proprietor CPA's was $74,914. To update this information, a new survey of 112 proprietor CPA's was taken and it showed a mean of $74,695.
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