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For recommendations on which laptop to purchase, consumers look at the ratings provided by Consumer Reports. A sample of 12 laptops was selected and the rating and score on the laptops' features were recorded as shown in the ‘laptops' file. The description of the variables in the ‘laptops' file is as follows: model (brand and description of laptop), price (retail price of laptop), rating (overall score by Consumer Reports), and features (a score of 1, 2, or 3 with low values indicating more features).
a) Find the prediction equation for the price of a laptop using rating and features. What is the value of the residual standard deviation?
b) If the value of SSE were equal to zero for this problem what would that imply?
Determine the confidence interval for population mean and the Superintendent wants to determine the average amount of hours per week the student population studies at home.
What is the 95% confidence interval estimate of the mean television viewing time per week during the 8:00 p.m. to 11:00 p.m. time period?
A study sponsored by American Express Co. and the French government tourist office found that old American stereotypes about French unfriendliness weren't true.
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
You're in charge of an experiment to evaluate a treatment which is advertised as being 90% effective at killing a particular insect. You plan an experiment in which the treatment is tested on 200 insects.
Standard deviation was increased to 40, determine the overall effect on their society? Would this change be a good thing?
The amounts of money requested on home loan applications at a particular bank follow the normal distribution, with a mean of $80,000 and a standard deviation of $24,000. A loan application is received during the day.
At 5% level of significance, does this sample prove violation of guideline that average patient must pay no more than $250 out of pocket?
a) Do a test to see if workers attitudes on this matter have changed using a 90% alpha. b) Explain to management what your findings are and what this suggests about future decisions vs work options.
To find out whether two categorical variables are independent, one should use the.
Use a test of the difference between proportions when answering these questions.
Draw a column chart from grade book. Use column illustrating students' names; select one of the tests to plot.
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