150 families in Metropolis yield the accompanying data on length of residence in current homes. What is a point estimate for the mean of the sampling distribution of the difference between the 2 sample means?

B. -15

Step-by-step explanation:

The question is incomplete, find the complete question attached. The point estimate of the mean is also known as the mean of the towns

Given the mean of two towns

xbarG for sample mean of Gotham = 35

xbarM for sample mean of Metropolis = 50

distribution of the difference between the 2 sample means = xbarG - xbarM

distribution of the difference between the 2 sample means = 35-50

distribution of the difference between the 2 sample means = -15

Hence option B is correct

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation:

2.2°  

step-by-step explanation:

let θ = the angle of elevation.

tanθ =77/2020

tanθ = 0.038 12

      θ = tan⁻¹0.038 12

      θ = 2.2°