Summary Statistics Are Given for Independent Simple Random Samples from Two

question 32

Multiple Choice

Summary statistics are given for independent simple random samples from two populations. Use the pooled t-intervalprocedure to obtain the specified confidence interval.
- $\overline { \mathrm { x } } _ { 1 } = 71.6 , \mathrm {~s} _ { 1 } = 3.9 , \mathrm { n } _ { 1 } = 11 , \overline { \mathrm { x } } _ { 2 } = 67.9 , \mathrm {~s} _ { 2 } = 3.4 , \mathrm { n } _ { 2 } = 9$
Determine a $99 \%$ confidence interval.

• A)\(- 1.07\) to \(8.47\)
• B) \(0.38\) to \(7.02\)
• C) \(- 1.83\) to \(9.23\)
• D) \(- 0.53\) to \(7.93\)

---

Definitions:

Average Variable Cost

The total variable cost per unit of output, found by dividing total variable costs by the quantity of output produced.

Fixed Cost

Costs that do not vary with the level of production or sales, such as rent, salaries, or insurance premiums.

Eyeglasses

Corrective or protective lenses mounted in a frame to aid vision or protect the eyes.

Average Variable Cost

The cost per unit of variable inputs divided by the total quantity of output produced.