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A sample of 10 high school students completed a course designed to increase SAT scores. Test scores (sum of X) = 5846 (sum of X squared) = 3428148
A) Mean and standard deviation are 584.6 and 34.28
B) What scores mark the cutoff for the most deviant 10%
C) In the past the average score was 542 can we conclude that there was a significant difference in the new test. We have to write a statistical statement and an English one.
D) If a student scored a 500 what would his percentile rank be?
Draw two pie charts, which allow the total yearly exports to be compared. Explain the trend in the export of fish as shown in the two pie charts.
A frequency polygon: does not depend on one variable. True-False
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.
Which of the following would produce a new confidence interval with smaller width based on these same data and produce a new confidence interval
A permutation resample for a two-sample test
Design a Linear programming problem for the flair Furniture Company and find the combination of tables and chairs that the company must produce to maximize profits.
What is the city mileage standard deviation for this SUV model?
What is the arithmetic mean selling price?
The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
Let X be the number of yes votes obtained from a random sample of 200 out of the entire voting population. What is the expected value of X if, in fact, 65% of all voters supported the dictator?
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
Compute the sample variance and sample standard deviation as a measure of volatility of monthly total return for Chevron (to 2 decimals): Sample variance and Sample standard deviation.
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