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Normal Distribution MATH 1030 Q8
A quick survey of peanut butter prices had standard deviation and mean of $0.26 and $3.68, respectively. Compute the area for a peanut butter jar costing less than $3.50.
How large should n be so that the standard deviation of is no more than 0.01 and sampling distribution
A random sample of 49 employees took a computer literacy test. The sample resulted in a mean score of 75 with a standard deviation of 21. Develop an approximate 95% confidence interval for the population mean of the 600 employees.
A 90% confidence interval estimate for a population mean was computed to be (38.2, 59.4). Determine the mean of the sample, which was used to determine the interval estimate.
Directions: Use the real estate data you used for your Week 2 learning team assignment. Analyze the data and explain your answers. You are consulting for a large real estate firm. You have been asked to construct a model that can predict listing..
Compute the correlation coefficient and the regression equation when the United States is removed from the data. What is your conclusion?
in 1988 the mean expenses for college were 8000 with a standard deviation of 800. if 40 students were selected at
The figure below shows the graphs of the probability density functions for the random variable X, the random variable x‾ for n = 5, and the random variable x‾ for n = 15.- Identify each probability density function.
A product coming off an assembly line has been found to weigh on average 17 pounds, with a standard deviation of 1.8. Thirty samples are chosen at random.
Twins. Twins are often born after a pregnancy that lasts less than 9 months. The graph from the Journal of the American Medical Association (JAMA).
If the researcher deems the data to be statistically significant, which of the following is true with respect to a conclusion reached?
In an effort to reduce customer dissatisfaction with delays in replacing lost automated teller machine (ATM) cards, some retail banks monitor the time required to replace a lost ATM card.
Interview about attitudes toward alcohol. You have given every student at the party the same chance to be interviewed: what is the chance? Why is your sample not an SRS?
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