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Q1) IQ scores are normally distributed with the mean of 100 points and standard deviation of 15 points. If all samples of size 64 are drawn, mean of sample according to Central Limit Theorem is 100.
a) True
b) False
Q2) Heighst of adult males are normally distributed with the mean of 69 inches and standard deviation of 2.8 inches.
a) Group of 225 adult males is chosen at random, determine the probability that their mean height is between 68 inches and 70 inches.
b) Group of 121 adult males is chosen at random; determine probability that their mean height is 72 inches or more.
c) Group of 417 adult males is chosen at random, determine the probability that their mean height is between 67.5 inches and 68.5 inches.
d) Group of 600 males is chosen at random, determine the probability that their mean height is between 68.7 inches and 69.3 inches.
The weight of the oranges, in pounds (1 pound = 16 ounces) is a random variable with standard deviation
In optimal solution, determinethe critical path?
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10. The upper and lower control limits, respectively, for an:
Increasing the confidence-interval level from .95 to .99
Probability distribution described by the following density curve and The expected value of the sum of the weights of the two oranges, in pounds
At the end of 24 weeks of treatment, subjects were classified as responders or non-responders to treatment based on a battery of psychological tests.
Suppose Abraham Lincoln had answered a survey questionnaire in which he indicated that he had not received a grade school diploma. The researcher found that Lincoln's educational score did not correlate with the expected variables. What was wrong?
The daily numbers of calls received by the Internal Revenue Service office in July are shown below:
Based on these results, the proportion of the variation in 1993 winnings that is explained by the average number of putts per round and driving distance
95% of breaking strengths will be contained between what two values symmetrically distributed around mean?
Formulate the hypotheses to test to see if the mean of the population is at least 12 ounces.
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