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Does the data set represent a sample or a population? If it is a sample, describe the population from which it has been drawn.
The following data represent scores of 50 students in an applied business statistics test.
72 72 93 70 59 78 74 65 73 8057 67 72 57 83 76 74 56 68 6774 76 79 72 61 72 73 76 67 4971 53 67 65 100 83 69 61 72 6865 51 75 68 75 66 77 61 64 74
It is impossible to obtain a standard error less than 2 for any sized sample.
Are the events "Republican" and "30-44" independent? Justify your answer. Are the events "Democrat" and "65+" independent? Justify your answer.
What is the mean and standard deviation of the sampling distribution of x-bar assuming that mean =20 and standard deviation equals the square root of 20?
The function that defines the probability distribution of a continuous random variable is a?For a continuous random variable x, the probability density function f(x) represents.
The probabilities that an automobile salesperson will sell 0, 1, 2, or 3 cars on any given day in February are, respectively, 0.19, 0.38, 0.29, and 0.15.
What is the probability that separates the bottom 25 percent from the rest of the distribution.
Indicate which would be the independent variable and which would be the dependent variable in each of the following:
Test hypothesis that mean weight of 2 sheets are equal against alternative that they are not(suppose equal variances). Use α=0.05 and suppose equal variances. Determine the P value.
If we select a crew member at random, what is the probability the crew member earns:
What decision should be made regarding the null hypothesis?
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?
Describe the difference between sample and a sampling distribution. Your reply must be in complete sentences and you may use sketches to help you.
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