Mathematics, 11.05.2021 14:00, fabio37
In a survey, 26 people were asked how much they spent on their child's last birthday gift. The results were
roughly bell-shaped with a mean of $39 and standard deviation of $17. Construct a confidence interval at a
80% confidence level.
a. Enter your answer as an open-interval (i. e., parentheses) accurate to one decimal place.
Confidence interval =
b. Express the same answer as a tri-linear inequality one decimal place.
c. Express the same answer using the point estimate and margin of error. Give your answers to one decimal
place.
+
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