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16. Marginal probability is also called (Points : 4)
Customer Question
16. Marginal probability is also called (Points : 4)
Simple probability
Conditional probability
Joint probability
Bayes' theorem
17. If n = 10 and p = 0.70, then the standard deviation of the binomial distribution is (Points : 4)
0.07
1.45
7.00
14.29
18. In its standardized form, the normal distribution (Points : 4)
has a mean of 0 and a standard diviation of 1.
has a mean of 1 and a variance of 0.
has an area equal to .05
cannot be used to aprroximate discrete probability distribution.
19. The “empirical rule” for the bellshaped curve states that the percentage of data points falling within three standard deviations away from the mean is 99.7% (Points : 4)
True
False
20. Distribution 1 is a skewed distribution and Distribution 2 is a symmetric distribution (not Normal distribution). Similar sample sizes will be required for the sample mean of random samples from the two distributions to have an approximate Normal distribution. (Points : 4)
True
False
21. The null hypothesis Ho always contains an equal sign (Points : 4)
True
False
22. If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the probability that a randomly selected college student will find a parking spot in the library parking lot in less than 3 minutes. (Points : 4)
0.3551
0.3085
0.2674
0.1915
23. If we know that the length of time it takes a college student to find a parking spot in the library parking lot follows a normal distribution with a mean of 3.5 minutes and a standard deviation of 1 minute, find the point in the distiribution that 75.8% of the college students exceed when trying to find a parking spot in the library parling lot. (Points : 4)
2.8 minutes
3.2 minutes
3.4 minutes
4.2 minutes
24. The fact that the sample means are less variable than the population data can be observed form the standard error of the mean. (Points : 4)
True
False
25. In leftskewed distribution, the median is (Points : 4)
equal to the mean
greater than the mean
less than the mean
none of the above
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Category:
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Expert:
Finley
replied 4 years ago.
16. Simple probability
17. 1.45
18. has a mean of 0 and a standard deviation of 1.
19. True
20. False
21. True
22. 0.3085
23. 2.8 minutes
24. True
25. greater than the mean
Finley, Professor
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