Question

The weights of a small box of healthy oats are normally distributed with a mean of 8.9 oz and a standard deviation of 0.1 oz. Find the probability that a randomly chosen box of healthy oats weighs more than 8.8 oz. Express the probability as a decimal.​

Answer 1

The answer is 0.84.

Explanation:

I solved it and got it all correct.

Answer 2

) Compute the sample mean x and the sample standard deviation s.

Do NOT use a computer. You may only use +, –, ×, ÷, and on a calculator.

Show ALL work.

9

143.1

9

15.5 16.2 16.1 15.8 15.6 16.0 15.8 15.9 16.2 = = = ∑ + + + + + + + +

n

x

x

i

= 15.9.

x x 2 x x − x ( ) 2

x − x

15.5

16.2

16.1

15.8

15.6

16.0

15.8

15.9

16.2

240.25

262.44

259.21

249.64

243.36

256.00

249.64

252.81

262.44

OR

15.5

16.2

Explanation: