SOLUTION: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $43.3 and standard deviation of $14.1

Question 1175460: In a survey, 11 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $43.3 and standard deviation of $14.1. Construct a confidence interval at a 90% confidence level.
Express your answer in the format of
¯x ± Error.
how do I do this formula?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!


Hi
 n = 11 , x̄ = 14.1  and  s = 14.1  "Sample sd"
90% confidence level  df = 10 , t = 1.81

ME = 1.81(14.1)/√11 = 7.695    |ME =
CI = $44.3 ±  7.7
Note:  Sample size small so CI bigger
Wish You the Best in your Studies.

RELATED QUESTIONS
In a survey, 30 people were asked how much they spent on their child's last birthday... (answered by math_tutor2020)

In a survey, 13 people were asked how much they spent on their child's last birthday... (answered by Theo,math_tutor2020)

In a survey, 11 people were asked how much they spent on their child's last birthday... (answered by Theo)

In a survey, 29 people were asked how much they spent on their child's last birthday... (answered by Boreal)

In a survey, 21 people were asked how much they spent on their child's last birthday... (answered by math_tutor2020)

In a survey, 30 people were asked how much they spent on their child's last birthday... (answered by Boreal)

In a survey, 29 people were asked how much they spent on their child's last birthday... (answered by Boreal)

In a survey, 12 people were asked how much they spent on their child's last birthday... (answered by ikleyn,math_tutor2020)