Question

Out of 1,500 licensed drivers, 900 admitted that they do not like to drive at night. What is the 92% confidence interval for the population mean of drivers that do not like driving at night?
CI = (57.79%, 62.21%)
CI = (56.90%, 61.76%)
CI = (57.21%, 62. 87%)
CI = (56.74%, 63.26%)

Answer 1

The confidence interval for the mean population of drivers who do not like driving at night is 57.79% - 62.21%.

Confidence interval

To determine what is the 92% confidence interval for the population mean of drivers that do not like driving at night, the following calculation must be performed:

• 1500 = 100
• 900 =X
• 900 x 100 / 1500 = X
• 60 = X
• 60 x 0.92 = 55.2
• 60 x 1.08 = 64.8

Therefore, the confidence interval for the mean population of drivers who do not like driving at night is 57.79% - 62.21%.

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