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Researchers studying infant head circumferences (in centimeters) wish to test if the mean head circumference differs from the historical mean of 34.5 cm. The researchers obtain a sample of 17 infants with a mean head circumference of 34.16 cm and a standard deviation of 0.58 cm.At the α = 0.05 significance level, test the claimHO: µ = 34.5HA: µ ≠ 34.5c) State the rule of rejection (in terms of p-value and level of significance) (5 points)d) Find the p-value (5 points)e) Should you reject or not reject HO? (5 points)f) Does the result suggest that the mean head circumference differs from 34.5 cm?
Test the mean cholesterol content in the egg is greater than 2.5 percent
If there is enough evidence to reject the claim of no difference in the ages of the two groups. Use the standard deviations from the samples and the P-value method.
How can the company do this and obtain independent samples? Explain in detail
Are these results sufficient to conclude that the self-hypnosis has a significant effect? Assume that increasing and decreasing allergic reactions are equally likely if the training has no effect. Use an alpha of .05."
Explain the ANOVA output table values:
The Johnson family uses a propane tank for cooking on their gas grill. During the summer they need to replace their tank on average every 30 days.
A correlation coefficient computed for n=18 and a=0.10 is r=0.692. . Using the t -test for the correlation coefficient, what are the critical values?
An experiment was conducted to compare the effectiveness of three training programs, A, B, and C, in training assemblers of a piece of electronic equipment.
In performing the symmetric approximation, you calculate a mean of the total system cost as $1,725K. The variance is 22500. The POE is $1,600K.
A random sample of 72 graduate students generated the following 90% confidence interval: (0.438, 0.642). Based on the interval above, is the population proportion of females equal to 0.60?
Examine the histogram of the standardized residuals for the regression of annual earning on annual hours worked among Registered Nurses below. Which conclusions can be made about the model using this graphic?
It was found that the correlation is about .80 and the regression equation is handspan = 3 + 0.35 height What is the predicted handspan for someone 5 feet tall?
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