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math stats dq hw
questio1
Samples
a-135
b-06252
c-31263
a. Obtain the sample mean and sample standard deviation of each of the three samples.
b. Obtain SST SSTR and SSE by using the defining formulas and verify that the one-way ANOVA identity holds.
c. Obtain SST SSTRand SSE by using the computing formulas.
d. Construct the one-way ANOVA table.
Question2
14.85 Study Time and Score. Following are the data on total hours studied over 2 weeks and test score at the end of the 2 weeks from Exercise 14.21.
x 10 15 12 20 8 16 14 22
y 92 81 84 74 85 80 84 80
a. Determine a point estimate for the mean test score of all be- ginning calculus students who study for 15 hours.
b. Find a 99% confidence interval for the mean test score of all beginning calculus students who study for 15 hours.
c. Find the predicted test score of a beginning calculus student who studies for 15 hours.
d. Determine a 99% prediction interval for the test score of a beginning calculus student who studies for 15 hours.
Question3
14.81 Corvette Prices. Following are the age and price data for Corvettes from Exercise 14.17. age 6 6 6 2 2 5 4 5 1 4
price 290 280 295 425 384 315 355 328 425 325
a. Obtain a point estimate for the mean price of all 4-year-old Corvettes.
b. Determine a 90% confidence interval for the mean price of all 4-year-old Corvettes.
c. Find the predicted price of a 4-year-old Corvette.
d. Determine a 90% prediction interval for the price of a 4-year- old Corvette.
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