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The following data show the results of an aptitude test (Y) and the grade point average of 10 students. Either enter the data into Excel or Minitab or use the appropriate formulas in Ch. 14 to get the answers to parts a through d below. Show on attached Excel or Minitab sheet where you got your answers, or copy and paste the answers from same. Aptitude Test Score (Y) GPA (X)
26 1.8
31 2.3
28 2.6
30 2.4
34 2.8
38 3.0
41 3.4
44 3.2
40 3.6
43 3.8
a. Show the estimated regression equation
b. Compute the coefficient of determination and comment on the strength of the regression relationship.
c. At 95% confidence, test to determine if the model is significant (i.e., perform an F test). Show calculations needed to get F-score.
Now imagine repeating the survey many, many times, each time recording a different sample mean commute distance. In the long run, a histogram of these sample means represents?
A recent report in BusinessWeek indicated that 20 percent of all employees steal from their company each year. fewer than 5 employees steal?
a certain researcher thinks that the proportion of women who say that the earth is getting warmer is greater than the
Do these simulated data provide evidence for us to conclude that a difference in the spinal canal cross sectional area exist between the population of subjects with disc hernination and a population of those who do not have disc hernation?
the associated press reported that in a survey of 4722 american youngsters aged 6 to 19 15 were seriously overweight a
An auditor for a Health Maintenance service of Georgia reports 40% of policyholder 55 years or older submit a claim during the year. Fifteen policyholders are randomly selected for company records.
A group of 47 randomly selected students have a mean score of 20.2 with a standard deviation of 4.6 on a placement test. Construct a 90% confidence interval for the mean score, , of all students taking the test.
Describe what do you mean by terms 'false positive" and " false negative".
A normal distribution has a mean of µ = 70 with σ = 12. If one score is randomly selected from this distribution, what is the probability that the score will be less than X = 55?
a distribution center receives shipments of a product from three different factories in the quantities of 60 30 and
The amount of time a bank teller spends with each customer is normally distributed with a mean of 3.10 minutes and a standard deviation of 0.40 minutes.
the scores of a random sample of 8 students on a physics test are as follows 60 62 67 6970 72 75 and 78. test to see if
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