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The weekly salaries of teachers in one state are normally distributed with mean of $490 and standard deviation of $45.
a. Determine the probability that a randomly selected teacher earns more than $525 per week?
b. Determine the probability a randomly selected teacher earns less than $435 per week?
At the 0.05 level of significance, is there evidence of a significant relationship between the age groups and where people primarily get their news? If so explain the relationship.
Find out the expected shape of distribution of sample mean?
In the 1992 U.S. presidential election, Bill Clinton received 43% of the vote compared to 38% for George H. W. Bush and 19% for Ross Perot. Suppose we had taken a random sample of 100 voters in an exit poll and asked them for whom they had voted.
expectation of the statistic that was proposed by Statistician - Based on the information collected in Tasks 1-8, which of the two statistics produces values which tends to be more concentrated about the expectation of the measurement?
The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Assume a sample of 60 Americans is taken to further investigate viewing habits. Suppose the population standard deviation for weekly viewing time is Q = 4..
The Price-to-Earnings ratio (P/E) of a publicly listed profit-making company is defined as the ratio of the stock price of the company to the earnings per share.
What is the probability that two of absent students were girls.What is the probability that two of absent students were boys.
How would the General Counsel's decision in Part (b) change if the cost of selling the second suit were only $200,000? What if the cost were $900000?
Four wheel bearings have been replaced on a company car. The mechanic has selected 4 bearings from a large supply bin. The mechanic is unaware that 10 percent of the bearings fail within the first 100 miles.
Form the cumulative percentage distribution and plan a cumulative percentage polygon.
Using smoothing constant of w = .80, compute the value of exponentially smoothed series in 1983.
Test the mean cholesterol content in the egg is greater than 2.5 percent
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