# 1. The model Y = ?0 + ?1X + ?2X2 cannot be estimated by Excel because of the nonlinear term

August 30, 2017

Question
1. The model Y = ?0 + ?1X + ?2X2 cannot be estimated by Excel because of the nonlinear term.
True False

2. If n = 25 and ? = .05 in a right-tailed test of a mean with unknown ?, the critical value is:
.0179 1.645 1.711 1.960

3. The process that produces Sonora Bars (a type of candy) is intended to produce bars with a mean weight of 56 gm. The process standard deviation is known to be 0.77 gm. A random sample of 49 candy bars yields a mean weight of 55.82 gm. Which are the hypotheses to test whether the mean is smaller than it is supposed to be?

H0: ? < 56, H1: ? ? 56H0: ? ? 56, H1: ? 56

4.To estimate the average annual expenses of students on books and class materials a sample of size 36 is taken. The sample mean is \$850 and the sample standard deviation is \$54. A 99 percent confidence interval for the population mean is:
\$826.82 to \$873.18

\$825.48 to \$874.52

\$832.36 to \$867.64

\$823.72 to \$876.28

5. If SSE is near zero in a regression, the statistician will conclude that the proposed model probably has too poor a fit to be useful.
TrueFalse

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