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Question: If the IQ scores are normally distributed with a mean of 100 and a standard deviation of 15.
(a) Find the probability that a randomly selected person has an IQ score between 88 and 112.
(b) If 100 people are randomly selected, what is the standard deviation of the sample mean IQ score.
(c) If 100 people are randomly selected, find the probability that their mean IQ score is greater than 103.
If a gambler rolls two dice and gets a sum of four, he wins $10; and if he gets a sum of three, he wins $25. The cost to play the game is $5. What is the expectation of this game?
Median can be a more suitable measure of central tendency than mean if distribution of data is extremely skewed.
Find the probability that the system is operational during the time period and what is the probability that component E3 had been operational?
Find out the estimate of the population mean.The mean daily sales at the Stop and Go are $20,000 for a sample of 40 days. The standard deviation of the sample is $3,000.
test for single proportion.one kind of plant has only blue flowers and white flowers. according to a genetic model the
Chi-square tests are great to show if distributions differ or if two variables interact in producing outcomes. What are some examples of variables that you might want to check using the chi-square tests? What would these results tell you?
Fair die is rolled 10 times. Determine the probability that the odd number (1, 3 or 5) will occur less than 4 times?
State the hypotheses. (b) State the decision rule and sketch it. (c) Find the test statistic. (d) Make a decision. (e) Estimate the p-value and interpret it. HeartRate.
A clothing retailer wishes to investigate the relationship between order size (in dollars) and the level of satisfaction of the customer.
If an employee is selected at random, what is the probablity that the employee is female or works as a member of admin?
Suppose that the insurance company developed a new payment system in an effort to increase this percentage. A sample of 200 claims processed under this system revealed.
15 pieces are selected at random for inspection. What is the probability of exactly 4 defective pieces being found in the sample?
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