1. Suppose that Jerry (a baker) wants to find a 95% Confidence Interval for the mean baking time for all of his jelly donuts. He takes a random sample of 40 jelly donuts over the course of several weeks. He found that the average baking time of the sample was 19.2 minutes with a standard deviation of 1.8 minutes. a. Find the 95% confidence Interval. b. Interpret the interval in context. c. Find the error bound of the interval.
1. Suppose that Jerry (a baker) wants to find a 95% Confidence Interval for the mean baking time for all of his jelly donuts. He takes a random sample of 40 jelly donuts over the course of several weeks. He found that the average baking time of the sample was 19.2 minutes with a standard deviation of 1.8 minutes. a. Find the 95% confidence Interval. b. Interpret the interval in context. c. Find the error bound of the interval.
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
Transcribed Image Text:1. Suppose that Jerry (a baker) wants to find a 95% Confidence Interval for the mean baking time for all of his jelly donuts. He takes a random sample of 40 jelly donuts over the course of several weeks. He found that the average baking time of the sample was 19.2 minutes with a standard deviation of 1.8 minutes.
a. Find the 95% confidence interval.
b. Interpret the interval in context.
c. Find the error bound of the interval.
d. Suppose Jose, another donut maker, states that his jelly donuts have a mean baking time of 18 minutes. Is there evidence at the 95% confidence level, to support the claim that the mean baking times for all Jerry’s and Jose’s jelly donuts are different? **Justify.**
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