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ACT scores for high school students are normally distributed with mean=24.1 and standard deviation=4.3. Student from the high school is arbitarily selected. Reply the following questions:
1) Determine the probability that the student's ACT score is less than 22?2) Determine the probability that the student's ACT score is between 22 and 30?3) Determine the probability that the student's ACT score is more than 30?4) Determine the minimum ACT score which places student at the top 5%?
Calculate the expected number of days it takes to get the order and standard deviation.
Carpet City wants to develops a means to forecast it carpet sale. The store manager believes that the store's sale are directly related to the number of new housing starts in town.
According to an early CDC study of 21 patients infected with the swine flu, the average incubation period was 7 days with a sample standard deviation of 4.5 days.
Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players produced long-term neurological deficits.
The firm has already decided that any sample mean below 78 or above 82 will signal the workers that the process is not working properly.
How many individuals will it need to sample to achieve this level of accuracy and confidence?
Assume that a simple random sample of a population has been selected from a population that has a normal distribution, Use the formula for X2( chi square distribution) and the chi-square distribution table
The probability is 90% that the sample percentage is contained within what symmetrical limits of the population percentage?
At the .10 significance level you will test to determine if there has been an increase in selling time. Is this a 1 or 2 tail test?
The average stock price for companies making up the S&P 500 is $40, and the standard deviation is $10. Assume the stock prices are normally distributed. What is the probability a company will have a stock price less than $33.
Suppose the download times for a commercial tax preparation site are normally distributed with a mean download time of 2.0 seconds and a standard deviation of 0.5 second.
How can you answer the dual simplex question with maximization objective function and also explain difference between m tecnique and two phase method?
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