(d) Explain why the confidence intervals obtained in parts (b) and (c) are different. Choose the correct answer below. OA. They are different because they represent different populations. The populations have different means and standard deviations that lead to different confidence intervals OB. They are different because of variation in sampling. The samples have different means and standard deviations that lead to different confidence intervals.

Solve

A company organizes its sales into territories, each assigned to one sales representative. An analyst theorizes that the on-the-job experience level of the sales rep may be related to the amount of sales in each territory. The analyst decided to use the time the sales reps had been employed at the company to predict sales. After taking a random sample of sales territories, the analyst measured the last quarter's Sales in dollars and the Experience the sales rep had at the company in months. Here are the three tables from the regression results: Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations ANOVA Regression Residual Total Intercept Experience (months) 0.5966 0.3559 0.339 497.9058 40 df 1 38 39 Coefficients 6.6108 SS 5205388.04 5205388.04 9420585.51 Standard Error 4250.9742 180.2332 14625973.55 1.4427 How many territories are in the sample? 247910.15 t Stat MS 23.586 4.5822 P-value 2.71E-24 4.85E-05 F 20.9971 Lower 95% Upper 95% 3886.1113…

3. Solve. x – 4 5 64 x +4 x - 16 O A. {-9} O B. {9} C. {-4, 4} O D. {4}