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Assume that women's heights are normally distrubted with a mean =62.4 inches and a SD given by =2.6 inch.
A. If a woman is randomly selected find the probability that her height is less than 63 inch.
B. If 27 women are randomly selected find the probability that they ahve a mean height less than 63 inch.
Round each answer to four decimals.
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
Union Membership Nationwide 13.7% of employed wage and salary workers are union members (down from 20.1% in 1983). A random sample of 300 local wage and salary workers showed that 50 belonged to a union.
consider the following dataset21.8 42.5 31.6 40.21. what is the sample mean of the values2. what is the sample standard
The test grades at a large school have an approximately normal distribution with a mean of 50. What is the standard deviation of the data so that 80% of the students are within 12 points (above or below) the mean?
The number of passengers arriving at an airport terminal average 1200 each hour. To process passengers (check in, take luggage, etc) take an average of 6 minutes each. There are 6 airport staffers processing passengers. How long is the average wait f..
The measure of forecast accuracy that is not influenced by the measurement scale of the time series data is:
Assume that the bulb life is normally distributed. At the 10% significance level, do the data provide evidence that the mean life for the company's light bulbs differs from the advertised mean?
the following data represent the responses y for yes and n for no from a sample of 40 college students to the question
a local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. the owner of the
the population in millions and the violent crime rate per 1000 were recorded for 10 metropolitan areas. the data are
If alternate hypothesis mention that m doesn't equal 4,000, determine the rejection region for the hypothesis test?
you learn the average gre score of private college graduates pursuing their mph is 1500 with a standard deviation of
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