Question

In a survey, 20 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $32 and standard deviation of $6. Find the margin of error at a 80% confidence level.Give your answer to two decimal places.

Answer 1

SOLUTION

Given the question in the image, the following are the solution steps to answer the question.

STEP 1: Write the given values

$\mu=32,\sigma=6,n=20,CI=\frac{80}{100}=0.8$

STEP 2: Calculate the Margin of error