The amount of an appliance repairman charges for each job is represented by the function t = 50h + 35, where h represents the number of hours he spent on the job and t represents the total amount he charges in dollars for the job. what does the slope of the graph of the situation represent? A.The number of hours worked per job B.the charge for the service initial fee C.the total cost of job D.the charge per hour

With a 85% confidence level you'd expect the teenage boys to be on average between [29.217; 30.783]cm taller than the girls.

Step-by-step explanation:

Hello!

Given the variables:

X₁: height of a teenage boy.

n₁= 46

₁= 195cm

S₁²= 58cm²

X₂= height of a teenage girl

n₂= 66

₂= 165cm

S₂²= 75cm²

If the boys are taller than the girls then you'd expect μ₁ > μ₂ or expressed as a difference between the two population means: μ₁ - μ₂ > 0

To estimate the difference between both populations you have to calculate the following interval:

(₁- ₂) + *

Point estimate: (₁- ₂) = (195-165)= 30

Margin of error: * = 1.450*0.54= 0.783

30 ± 0.783

[29.217; 30.783]

With a 85% confidence level you'd expect the teenage boys to be on average between [29.217; 30.783]cm taller than the girls.

I hope this helps!