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Suppose a random sample of n = 15 observations is selected from a population that has normal distribution with mean 50 and standard deviation 10.
a. Give the mean and the standard deviation of the sample mean X.
b. Find the probability that sample mean X exceeds 55.
c. Find the probability that the sample mean deviates from the population mean by less than 4.
Write a formula for the Poisson approximation for probability. Using your formula estimate the probability that a given student is called upon more than twice - What is the probability that a particular block will receive no leaflets
Assume the probability that a telephone in any given telephone booth is defective is 0.2. Determine the probability that if 8 phone booths are examined, the number of defective phones is exactly 3.
How many of the 110 scores are expected to be below 34.16 ?(two standard deviations above the? mean)?
Is the actual proportion of people who trust DNA testing larger than 90%? Test the researcher's claim at the 1% level of significance.
an english literature professor hands out a list of four essay questions two of which will appear on the nal
430 randomly selected light bulbs were tested in a laboratory, 224 lasted more than 500 hours. Find a point estimate of the proportion of all light bulbs that last more than 500 hours.
Discuss the positive and negative effects of the Cold War on African Americans.?
1. a large tank of fish from a hatchery is being delivered to a lake. the hatchery claims that the mean length of fish
A. What is the point estimate of µ1 - µ2? Round to two decimal places.
If you have a population that has a small sample, but does not meet all of the criteria for the nonparametric test how can you tell what test to use?
After reviewing the Verizon Report, what points or statistics strike you? Why? Name some, why do you consider them candidates for Gen to Rev classification?
the national association of realtors released a survey indicating that a surprising 43 of first-time home buyers
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