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Consumer Reports provided extensive testing and ratings for more than 100 HDTVs. An overall score, based primarily on picture quality, was developed for each model. In general, a higher overall score indicates better performance. The following data show the price and overall score for the ten 42-inch plasma televisions (Consumer Report data slightly changed here):
Brand
Price
Score
Dell
2800
60
Hisense
55
Hitachi
2700
45
JVC
3500
50
LG
3300
Maxent
2000
38
Panasonic
4000
67
Phillips
3000
56
Proview
2500
32
Samsung
40
Use the above data to develop an estimated regression equation. Compute the Coefficient of Determination and the correlation coefficient and show their relation. Interpret the explanatory power of the model. Estimate the overall score for a 42-inch plasma television with a price of $3400.
Find a 98% confidence interval for the true proportion of students who have a personal blog with a maximum margin of error of 0.03. How many students do you survey?
Assume that you have selected 10 students enrolled at your college and have collected data for these three variables:
Why is the F distribution important? How do you determine if a significant difference exists among the groups in ANOVA? How do you determine differences between the groups in ANOVA?
If code is 4 random letters, and letters can be utilized multiple times, how many different possible codes are there?
1. consider the following time series data.week 1 2 3 4 5 6value 18 13 16 11 17 14 using the naive method most recent
The bank credit card department of Carolina Bank knows from experience that 5 percent of the card holders have had some high school, 15 percent have completed high school, 25 percent have had some college
Find the marginal distribution of vehicle type in New York and find the conditional distribution of vehicle type given that the transmission is automatic.
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The mean television viewing time for Americans is 15 hours per week (Money, November 2003). Suppose a sample of 40 Americans is taken to further investigate viewing habits.
Genetics of peas. According to genetic theory, the blossom colour in the second generation of the certain cross of sweet peas should be red or white in a 3:1 ratio. That is, each plant has probability 3/4 of having red blossoms, and the blossom co..
Suppose you take a random sample of 15 bearings and compute xbar = 8.2535. What is the probability that you will see a sample mean greater than xbar?
A standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 and 6 cups?
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