Mathematics, 14.04.2020 16:30 amberlynnwallac7808
A student researcher compares the ages of cars owned by students and cars owned by faculty at a local state college. A sample of 64 cars owned by students had an average age of 6.27 years. A sample of 40 cars owned by faculty had an average age of 7.64 years. Assume that the population standard deviation for cars owned by students is 2.64 years, while the population standard deviation for cars owned by faculty is 3.42 years. Determine the 80% confidence interval for the difference between the true mean ages for cars owned by students and faculty. Step 2 of 3 : Calculate the margin of error of a confidence interval for the difference between the two population means. Round your answer to six decimal places.
Answers: 2
Mathematics, 21.06.2019 21:30
Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?
Answers: 2
Mathematics, 22.06.2019 00:00
Meg constructed triangle poq and then used a compass and straightedge to accurately construct line segment os, as shown in the figure below, which could be the measures of angles pos and angle poq?
Answers: 1
Mathematics, 22.06.2019 00:00
Rewrite the equation x = 65 - 60p by factoring the side that contains the variable p.
Answers: 2
A student researcher compares the ages of cars owned by students and cars owned by faculty at a loca...
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