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A calculus instructor uses computer aided instruction and allows students to take the midterm exam as many times as needed until a passing grade is obtained. Following is a record of the number of students in a class of 20 who took the test each number of times.
Students Number of Tests 10 1 7 2 2 3 1 4
a. Use the relative frequency approach to construct a probability distribution and show that it satisfies the required condition. b. Find the expected value of the number of tests taken. c. Compute the variance. d. Compute the standard deviation.
Exchange ("the big board") and five stocks listed on NASDAQ. At the .10 significance level, can we conclude that the annual rates of return are higher on the big board?
What is the probability the number of fatal crashes will be between 1000 and 2000 for a year?
The probability of a player weighing more than 241.25 pounds on a team with the mean weight of 200 pounds and a standard deviation of 25 pounds is ??
The scores of college-bound senior men on the math part of the SAT followed a normal distribution with mean 527 and standard deviation 116.
The random sample population is 500 people who shop for workout programs and equipment. The sample mean of those shopping is that they spend an average of $250.00 per purchase and perchance at least 2 to 3 items for working out and weight lost
What is the probability that all tree students pick a different card?
The pollsters can be 95% confident that the true proportion of adults who approve of human cloning is within what percentage of the estimated 11.7%?
Which trend model is best, and why? If none is satisfactory, explain. (e) Make a forecast for 2004 by using a trend model of your choice or a judgment forecast.
The probability that Traci Muldone will die during the 10-year term of a life insurance policy is assessed by the insurance company at 1/5. Arthur Average's probability of living to the end of the 10-year period is reckoned at 95%
Basically trying to figure out once you get the test statistics how you determine critical value through the Table chart. Trying to find critical value for test statistics of 2.36 with 10 subjects, 7 had higher scores, 2 had lower scores, and 1 sco..
Discuss the properties of a normal distribution. Why are there infinite possible normal distributions? Why should one assume that sample data represents a population distribution?
The scores on a scholastic achievement test were normally distributed with mean 520 and standard deviation 94. (a) If your score was 700, by how many standard deviations did it exceed the average score?
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