Find 95% confidence interval for the population mean, if the sample size is 40, the sample mean is 520 and standard deviation is 35? Sketch the graph?
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Find 95% confidence interval for the population mean, if the
is 40, the sample mean is 520 and standard deviation is 35? Sketch the graph?
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- The scores on a standardized test are normally distributed with a mean of 115 and standard deviation of 20. What test score is 2.2 standard deviations above the mean?Calculate the mean if -2 standard deviation = 70 and +2 standard deviation = 100. The mean of the data set isThe scores on a standardized test are normally distributed with a mean of 85 and standard deviation of 10. What test score is 1.7 standard deviations above the mean?