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1. What is meant by and what is the function of (a) Simple regression analysis? (b) Linear regression analysis? (c) A scatter diagram? (d) An error term?
grear tire company has produced a new tire with an estimated mean lifetime mileage of 37500 miles. management also
the weight of food packed in certain containers is a random variable with a mean of 16 oz. and a standard deviation of
Find out the mean number of letters that will arrive in two days.
question the following table shows the price-to-earnings ratio for a stereo equipment manufacturing company between
When do you use a one-tailed test? How do you find the critical values for one-and two tailed tests? When do you reject the null hypothesis? Under what circumstances is the null accepted?
Test claim that mean responses are same for all populations of patients receiving either treatment and of either gender.
a random sample of 81 credit sales in a department store showed an average sale of 68.00. from past data it is known
Use the given margin of error, confidence level, and population standard deviation (o) to find the minimum sample size required to estimate an unknown population means (u)
lipitor is a cholesterol reducing drug. in clinical trials 94 subjects were treated with the drug and 200 were given a
Find a 90% confidence interval for the population mean if the sample mean is 1250 with a sample standard deviation of 35 for a sample of 20.
x viscosity of a polymer with catalyst a was measured for 22 samples with resulted in sample average of 742 and
1. what are the assumptions of the simple linear model?2. name three assumptions of the anova
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