2. According to data released by the North Carolina Department of Health & Human Services, 1.795% of NC African Americans who contracted COVID-19 did not survive. Of NC Caucasians who contracted the virus, 1.469% passed away. The Mecklenburg Health Department collected an SRS of 600 African Americans and another SRS of 700 Caucasians who had all been infected. Let P1 = the sample death rate of African Americans and p, = the sample death rate of Caucasians. %3D [Data collected from publicly available reports at covid19.nchhs.gov as of 1/3/21] A. Describe the shape of the sampling distribution of p1 – P2 · Justify your answer. B. Find the mean and standard deviation of the sampling distribution of p1 – P2. Interpret the standard deviation and be sure to check any relevant conditions. C. What is P(P1 - P2 > 0)? D. Interpret your answer to part C in context.

A researcher believed that the number of rental cars in service by a car rental company would have an impact on the total annual revenue for that car rental company. Five small car rental companies were surveyed, with the number of Cars in service recorded in units of 1000 (so if a car rental company had 54000 cars in service, a 54 would be recorded) and Annual Revenue measured in millions of dollars (so an Annual Revenue of $10,000,000 would be recorded as 10). The data follows: Cars (1,000s)       Annual Revenue ($ millions)11.5                   118 10.0                   135 9.0                     100 5.5                     37 3.3                     32 Part of the Excel-generated Simple Linear Regression output is provided below: ANOVA   df SS MS F Significance F Regression 1 7891.863897 7891.863897 22.91180151 0.017339231 Residual 3 1033.336103 344.4453677     Total 4 8925.2           Coefficients Standard Error t Stat P-value Intercept -19.12490108 23.1658578…

%24 2) y= 2Vx+1 %3D 9- 9- レーメ Ay 3/ 1) y%=

3 3 4 If 2A + 3B = 4X - I find X, where A = -3 0 7 and %3D 71 2 2 7 -5 1 0 B 2 -2 4 CS Scanned wfth CamScanner