)a random sample of 110 lighting flashes in a certain region resulted in a sample average radar echo duration of 0.81 sec and a sample standard deviation of 0.34 sec. calculate 99% (two-sided) confidence interval for the true average echo duration µ.

99% (two-sided) confidence interval for the true average echo duration µ is

(0.73<µ<0.89)

Step-by-step explanation:

Confidence Interval can be calculated using M±ME where

And margin of error (ME) around the mean can be calculated using the formula

ME= where

Then ME= ≈0,084

99% Confidence interval would be 0.81±0,08 or (0.73, 0.89)

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

list

6,24,51,72,12,54,80,44,57,64,92,26,66,96

your welcome!