GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A 99% confidence interval for the mean number of cars owned by a family is (1.08, 4.14). What is the value of the sample mean used to calculate this interval?
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2.61
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2.285
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1.305
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4.57
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Explanation:
Detailed explanation-1: -If the level of confidence is 99%, this means that we are 99% confident that the interval contains the population mean, µ. The corresponding z-scores are ± 2.575.
Detailed explanation-2: -Thus, the t-score for a 99% confidence interval for sample size 20 is 2.861.
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