A small business tracks how advertising spending relates to weekly sales. ( D ) \left(D\right) Are the actual sales numbers for weeks with $400 ad-spending within the interval?

Welcome back. In this practice problem, a small business tracks how advertising spending relates to weekly sales. In part a, we created a scatter plot with the data, got the regression line equation, and found the correlation coefficient. In part b, we used our equation to predict the weekly sales, y, if x, advertising, was 400, and in part c, we created a 90% prediction interval for the value in part b. Now in part d, we wanna see are the actual sales numbers for weeks with $400 of ad spending within the interval. Looking at our data here, we can see that there is exactly one week, it's week 13, with advertising spending of $400. We can see that the actual sales for that week was $10,200, and we wanna see if that's in the prediction interval. Our prediction interval stretches from 9,066.62 to 11,434.18. And so we can see that 10,200 would be inside that interval. So the answer for part d is yes. Great work.