Summary Statistics Are Given for Independent Simple Random Samples from Two

Summary statistics are given for independent simple random samples from two populations. Use the pooled t-intervalprocedure to obtain the specified confidence interval.
- $\overline { \mathrm { x } } _ { 1 } = 72.9 , \mathrm {~s} _ { 1 } = 10.4 , \mathrm { n } _ { 1 } = 16 , \overline { \mathrm { x } } _ { 2 } = 68.0 , \mathrm {~s} _ { 2 } = 8.3 , \mathrm { n } _ { 2 } = 12$
Determine a $90 \%$ confidence interval.

A) $0.10$ to $9.70$
B) $0.88$ to $8.92$
C) $- 1.99$ to $11.79$
D) $- 1.33$ to $11.13$

Correct Answer:

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