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Consider the data with analysis shown in the following computer output:
Level N Mean St Dev
A 7 86.927 4.961
B 5 76.167 6.555
C 5 80.000 9.230
D 7 69.333 6.154
Source DF SS MS F P
Groups 3 1120.16 373.39 8.41 0.001
Error 20 887.54 44.38
Total 23 2007.70
What is the pooled standard deviation? What degrees of freedom are used in doing inferences for these means and differences in means?
Round your answer for the pooled standard deviation to two decimal places.
What is the pooled standard deviation is?
What is degrees of freedom?
The CDC reported very large weight increases for U.S. residents of both genders and of all age groups over the last four decades.
an analyst is testing a two tail hypothesis to determine if the mean housing loan has changed from last years value of
The stock pays an annual dividend of $0.6 per share. Today, you sold all of your shares for $30 per share. What is your total dollar return on this investment?
Test the claim that the average gasoline consumption per car in the United States is more than 7 liters per day. (We're going metric here!) Use the random sample here, which represents daily gasoline usage for one car:
You randomly choose one of the four cards removed from the deck and ask your friend (without seeing the card) to tell you what it is. You replace the card and repeat the experiment four times.
Calculate the chi-square statistic? Recalculate the chi-square statistic with twice the number of subjects?
At the end of the experiment the researcher obtained data on the number of cigarettes smoked by participants.
State the appropriate null and alternative hypothesis for testing the standard regarding the mean value. Test the hypothesis using a significance level equal to 0.05. What assumption will be required?
Mike Mangold (another OSU alumni) is anxious about leaving work and driving to see his "significant other" for the weekend. He also took Dr. Mark's BusMgt 2321 class and wants to use what he learned in class to solve the problem. He has analyzed..
The standard deviation of the weights of elephants is known to be approximately 15 pounds. We wish to construct a 95% confidence interval for the mean weight of newborn elephant calves.
Find the appropriate critical statistic for : A one tailed test in the positive direction with 15 observations with alpha equal to 0.001.
Qualitative research often generates large amounts of data that must be gathered and analyzed. The use of statistical software such as the Statistical Package for the Social Sciences (SPSS) can significantly simplify and enhance the analysis of qu..
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