What is the mean of x
If X is the normal random variable with standard deviation 4.00, and if the probability that X is more than 5.52 is .1271 (as shown below), then what is the mean of X? (Note: the diagram is not necessarily to scale.)
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Suppose that 21 year old men's heart rates at rest are normally distributed with a mean of 72 beats per minute. If 600 men are examined, how many would you expect to have a heart rate of less than 73?
The number of hours college students spend working per week has a normal distribution with a mean of 22 hours and a standard deviation of 6 hours. Determine the percentage of college students who work between 16 and 28 hours per week.
If X is a normal random variable with mean 11, and if the probability that X is less than 12.10 is .72 (as shown below), then what is the standard deviation of X? (Note: the diagram is not necessarily to scale.)
Translate given statement into symbols of formal logic: If you are not in South Korea, then you are not in Seoul or Kwangju.
One large course has 900 students, broken down in section meetings with 30 students each. The section meetings are led by TA's. On the final, the class avg is 63 and the SD is 20. However, in one section the avg. is only 55. The TA argues this way
Examine logical form of given statement. Then examine (b) and (c) and find if statement is equivalent to either statement (a) or its converse.
A newspaper article says that on average, college freshmen spend 7.5 hrs a week partying. One administrator does not believe that these figures apply to her college of nearly 3000 freshmen. She takes a simple random sample of 100 freshmen and inte
Supposing the true heart disease incidence rate for women with breast cancer is 2.5%, determine the power of this test if the investigators are capable to track 6,000 women with breast cancer? Answer as the proportion carried to three digits beyon
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