Question

5) 1

Answer 1

Answer:

$3.49

Step-by-step explanation:

-The z value is calculated by the formula:

$z=\frac{\bar x -\mu}{\sigma}$

Where $\mu, \sigma$ are the mean and standard deviation respectively and $\bar x$ is the price of the random selection.

#We substitute and solve for $\mu$:

$z=\frac{\bar x -\mu}{\sigma}\\\\1.6=\frac{4.29-\mu}{0.5}\\\\0.8=4.29-\mu\\\\\mu=3.49$

Hence, the mean price of a box of cereal is $3.49