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 random sample of 15 DVD players has a mean price of $64.30 and a standard deviation of $5.60. Find a 95% confidence interval for the mean price of all DVD players.
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(61.20, 67.40)
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(61.47, 67.13)
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(61.22, 67.38)
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(61.10, 67.51)
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Explanation:
Detailed explanation-1: -Three conditions must be met in order to construct a confidence interval. Random, Independent, and NormaL are the conditions.
Detailed explanation-2: -There are three conditions we need to satisfy before we make a one-sample z-interval to estimate a population proportion. We need to satisfy the random, normal, and independence conditions for these confidence intervals to be valid.
There is 1 question to complete.