STATISTICAL TECHNIQUES AND TOOLS
CONFIDENCE INTERVALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A laboratory tested 72 candy bars found in vending machines and found that the mean number of calories was 240 with s = 19.6 calories. Construct a 95% confidence interval for the mean calories of all candy bars found in vending machines.
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(236.21, 243.79)
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(235.47, 244.53)
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(234.04, 245.96)
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(235.40, 244.60)
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Explanation:
Detailed explanation-1: -Calculating a C% confidence interval with the Normal approximation. ˆp±z√ˆp(1−ˆp)n, where the value of z is appropriate for the confidence level. For a 95% confidence interval, we use z=1.96, while for a 90% confidence interval, for example, we use z=1.64.
There is 1 question to complete.