Question

HELPPP ASAPP Bernie's Bars has determined that a granola bar measuring 3 inches long has a z-score of +1 and a granola bar measuring 3.50 inches long has a z-score of +2. What is the standard deviation of the length of granola bars produced at Bernie's Bars? 3
3.5
2
0.50

Answer 1

Answer:

the answer is D) 0.5

Step-by-step explanation:

This is because the the 3 inch bar to 3.5 inch bar jumped 0.5, but the z-score jumped 1. So if the z-score keeps jumping 1 every 0.5, your answer has to be D).

PLEASE MARK BRAINLIEST!

Answer 2

Answer:

Standard deviation of the length of granola bars produced at Bernie's Bars is 0.50      

Step-by-step explanation:

We are given the following information in the question:

Formula:

$z_{score} = \displaystyle\frac{x - \mu}{\sigma}$

where,

μ is the mean and σ is the standard deviation.

Putting the values we get:

$\displaystyle\frac{ 3- \mu}{\sigma} = 1\\\\3 = \sigma + \mu\\\\\displaystyle\frac{ 3.5- \mu}{\sigma} = 2\\\\3.5 = 2\sigma + \mu$

Solving the two obtained equations:

Subtracting the two obtained equation, we have:

$3.5-3 = \mu + 2\sigma - \mu -\sigma\\\sigma = 0.5$

Hence,  standard deviation of the length of granola bars produced at Bernie's Bars is 0.50