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1)For n = 49, find the 90% confidence interval for x bar = 85 and ó = 2. Do not round.
2)A purchasing agent for a national chain of seafood restaurants wants to estimate the mean weight of shrimp in a large catch. How many shrimp should be sampled from the catch to be 95% confident that the sample mean will be off from the actual mean weight by no more than 1.4 grams. Assume that ó = 4 grams.
3)Find the 99% confidence interval for a sample size of 25, x bar = 150, and s = 3. Round your final answer to two decimal places.
Random samples of size 64 are taken from a large population whose mean is 160 and whose standard deviation is 25. What is the mean of the sampling distribution of the sample mean?
There are assumptions of multiple regression. One of them is: the residuals are independent. This means that successive observations of the dependent variable are not correlated.
Findout the margin of error for this survey if we want a 99 percent confidence in our estimate of the percent of adults over 50 who take vitamin supplements.
Formulate and solve linear program for determining how many copies should be assigned to each printing firm to minimize the total cost of obtaining 75,000 acceptable-quality reports?
Seven employees were included from Area A, 9 from Area B and 12 from Area C. The test statistic was computed to be 4.91. What can we conclude at the 0.05 level?
When constructing your decision tree, you can reuse the EMV for the outcome after the decision to not hire the consulting team.
A sample of the personal files of eight male employees revealed that during a six month period they lost the following number of days due to illness 2, 0, 6, 3, 10, 4, 1, 2. Calculate the standard deviation. show your work.
In Dallas some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 143, 348 runs and had 20 accidents, while the fleet of yellow firetrucks made 135,035 runs and had 4..
Is there evidence of a difference in the median performance between the two methods? (Use x = 0. 05).
His least squares regression line equation is: "assembly line output" = 1.03 + (5.1389 x Test Score). Which scatter plot has the graph of his line?
All standard IQ test scores are normally distributed and are set up so that the mean score is 100. However, the standard deviation differs from test to test.
If light bulbs failure times are identically and independently distributed, what shape would you expect for the hazard function of the light bulbs? Draw a picture and explain.
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