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A statewide real estate company specializes in selling farm property in the state of Nebraska. Their records indicate that the mean selling time of farm property is 90 days. Because of recent drought conditions, they believe that the mean selling time is now greater than 90 days. A statewide survey of 100 farms sold recently revealed that the mean selling time was 94 days, with a standard deviation of 22 days. At the .10 significance level you will test to determine if there has been an increase in selling time. Assuming we are using a t test what will be the critical value"?
R.C. Geary wrote some 70 years ago that "Normality is a myth. There never was, is, nor will there ever be a Normal distribution".
The probability of drawing a 6 (to complete an inside straight) after discarding the ace.
The amount ($1.00, $5.00, $10.00, $25.00, or $50.00) promised to each person was determined by randomization. For each person who was sent one of the surveys, The value of the X2 test statistic for testing the hypothesis
Calculate the standard error. With 95% confidence, find out the margin of error?
If possible, determine a 95% confidence interval for average number of television sets in all 50,000 households. If this is not possible, describe why not.
In a simple linear regression analysis of 18 data points the following ANOVA table was found.
Use a calculator or appropriate computer software to verify that, for the preceding data, xbar = 5.1.
She then uses the mean and standard deviation of these values to estimate the mean value for all parts the operator is making. Construct a 95% confidence interval for the mean value assuming a normal distribution.
Fitting of multiple linear regression equation - Give a list of the model assumptions for a regression model.
A fair coin was flipped three times and landed heads three times. What is the probability of a head on the next toss?
Assume the first patient is assigned treatment A, and whenever there is a tie in marginal discrepancy, the next patient is assigned treatment A. Use w0 = 2 and w1 = 1. Show all you work.
The cost of one serving of peanut butter ( in cents) for a random sample of 19 jars of peanut butter was found to be:
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