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Paul received a score of 80 on a history test for which the class mean was 70 with a standard deviation of 10. He received a score of 75 on a biology test for which the class mean was 70 and the standard deviation was 2.5. On which test did he do better relative to the rest of the class? Please explain in a sentence or two your reasons for your choice.
Standard deviation of 6.9 centimeters.assuming that the heights are recorded to the nearest half-cm, how many of these students would you expect to have heights less than 160.0 centimeters.
Is a sample of 25 papers large enough to provide a good estimate of the mean score of all 42,000 students on this exam problem? Justify your answer.
A certain component is critical to the operation of medical device and must be replaced immediately upon failure. If the mean lifetime of this type of component is 100 hours and its standard deviation is 30 hours, how many of these components must..
How many women must be randomly selected to estimate the mean weight of women in one age group. We want 90% confidence that the sample mean is within 3.7 lb of the population mean.
The Confused Bricklayer Robot Problem - Draw a picture to illustrate the initial problem situation and how can you describe a possible solution?
Estimate the probability the store will gross over $850 a) At least 3 out of 5 business days.
Prove that there is a sequence of polynomials p_n on [0,1] such that p_n ----> 0 pointwise on [0,1] but the integral from 0 to 1 of p_n dx
A survey taken in a restaurant shows the following number of cups of coffee consumed with each meal. Construct an ungrouped frequency distribution.
Suppose that a certain college class contains 45 students. Of these, 26 are sophomores, 25 are chemistry majors, and 7 are neither. What is the probability that the student is both a sophomore and a chemistry major?
A. What is the 90% confidence interval for the daily sales at all restaurants. B. What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2..
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
Construct the 90 percent confidence interval for the proportion of checking account customers who have a Visa card with the bank. (Round your answers to 3 decimal places.)
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