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位置16的问题 A random sample of 144 observations has a mean of 20, a median of 21, and a mode of 22. The population standard deviation is known to equal 4.8. The 95.44% confidence interval for the population mean is 19.2 to 题库 1/1[input]. (Note: Round the answer to one decimal place.）
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We start by identifying the essential data: sample size n = 144, sample mean x̄ = 20, and the population standard deviation σ = 4.8 is known. The confidence level is given as 95.44%, which implies a two-sided z-critical value, since the standard normal distribution is used wh......Login to view full explanationLog in for full answers
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