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1) A measure of emotional intelligence has a mean of 100 and a standard deviation of...

1) A measure of emotional intelligence has a mean of 100 and a standard deviation of 15 in the population.  A researcher collects a sample of 49 people and found that sample mean was 99.  Calculate a 90% confidence interval for the population mean.

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Confidence interval can be calculated using the formula below: ที 15 49 C.I.-99+1.64(2.1428) C.I. 99+ 3.51412 C.I. (95.485,102.514) Note: z* value at 90% confidence interval is 1.64 from z-table

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