For 7-9, suppose the ages of people in a group are normally distributed with a
mean of 51.3 years and a standard
deviation of 4.19 years. Use the partial
standard normal table for your answers.
Round answers to the nearest tenth.

7. What percent of people in the group are
no more than 42 years old?
8. What z-score would you use to determine
the percent of people with an age less
than 62 years old?
9. What percent of people in the group are
between 47 and 50 years old?

mean, 40.6

step-by-step explanation:

365

step-by-step explanation:

one way is to plot 2 points and connect them which is what the answer choices seem to be doing

it seems to be using the y intercept and the slope

y=mx+b, m=slope, b=y-intercept (where the line hits the y axis)

slope=rise/run

y-intercept is where the line croses the y axis which is the y value where x=0

you seem to have given the wrong slope (you didn't put a number in front of te x, it should be 2/3 or 3/2 looking at the answer options)

y=? x-1

m=? because of your fault

b=-1

so it has a slope of ? and y intercept of -1, meaning it pases through (0,-1)

so draw point (0,-1) (so answer is one of the first 2 option)

if slope is 2/3, then go up 2 and right 3 then draw line through those 2 points

if slope is 3/2, then go up 3 and right 2 then draw line through those 2 points