In Constructing a 90% Confidence Interval Estimate for the Difference $n _ { 1 } = 40$

question 73

Short Answer

In constructing a 90% confidence interval estimate for the difference between the means of two normally distributed populations, where the unknown population variances are assumed not to be equal, summary statistics computed from two independent samples are as follows: $n _ { 1 } = 40$ , $\bar { x } _ { 1 } = 95$ , $s _ { 1 } = 12.5$ . $n _ { 2 } = 30$ , $\bar { x } _ { 2 } = 75$ , $s _ { 2 } = 35.5$ . The lower confidence limit is: $$\begin{array} { | l | l | } \hline \text { A. } & 30.086 . \\\hline \text { B. } & 8.542 . \\\hline \text { C. } & 0.914 . \\\hline \text { D. } & 31.458 . \\\hline\end{array}$$

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Economizing Problem

The choices necessitated because society’s economic wants for goods and services are unlimited but the resources available to satisfy these wants are limited (scarce).

Consumer Desire

The inclination or preference of consumers towards certain products or services they wish to purchase.

Strawberry Pickers

Laborers who are engaged in harvesting strawberries from farms or fields, often seasonal work.

Supply of Strawberries

The total quantity of strawberries that producers are willing and able to sell at a given price over a specified period of time.