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A history professor took a sample of 10 final exam scores from a class of 30 students. The 10 scores are shown in the table below:
95 67 76 47 85 70 87 80 67 72
(a) What is the sample mean?
(b) What is the sample standard deviation? (Round your answer to two decimal places)
(c) If you leveraged technology to get the answers for part (a) and/or part (b), what technology did you use? If an online applet was used, please list the URL, and describe the steps. If a calculator or Excel was used, please write out the function.
Flight times An airline flies the same route at the same time each day. The flight time varies according to a Normal distribution with unknown mean.
In a study of patient confidentiality, a large number of pediatricians was surveyed. Each pediatrician was given a "fable" about a female patient less than 18 years old.
James is expecting three checks in the mail, for $20, $26, and $33 dollars. Their arrivals are the events A, B, C. Assume the class is independent.
What are the implications to a business if the forecast is too high - show a graph of the historical and forecasted sales in one graph
What is the approximate probability that the total weight of the passengers exceeds 4000 pounds? Use the four-step process to guide your work.
If a random sample of 36 lobster fishermen is selected, what is the probability that their average catch is less than 31.5 pounds? Assume the distribution of the weights of lobster is normal.
The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall semester on the basis of past experience.
Refer to Cosmetics sales Problem 10.13. Given below are the estimated ridge standardized regression coefficients, the variance inflation factors, and R2 for selected biasing constants c.
1. other things being equal as the sample size increases the standard error of a statistica. increasesb.
In general, approximately how many values must be altered to make the sample median arbitrarily large?
Evaluate the following statement: In order to run most multivariate analyses, it is not necessary to meet all the assumptions of normality, linearity
Calculate the 95% confidence interval for the population proportion of patients who are successfully treated. (c) Write a sentence that correctly interprets this interval.
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