Question
1) A survey of 50 young professionals found that they spent an average of $19.95 when...
1) A survey of 50 young professionals found that they spent an average of $19.95 when dining out, with a standard deviation of $13.06. Can you conclude statistically that the population mean is greater than $26? Use a 95% confidence interval.
The 95% confidence interval is _____. As $26 is _____ (within/above/below the limit) of the confidence interval, we _____ (can/cannot) conclude that the population mean is greater than $26
2) A survey of 230 young professionals found that 1/8 of them use their cell phones primarily for e-mail. Can you conclude statistically that the population proportion who use cell phones primarily for e-mail is less than 0.19? Use a 95% confidence interval.
The 95% confidence interval is ____, As 0.19 is (within/above/below the limit) of the confidence interval, we (can/cannot) conclude that the population proportion is less than 0.19
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