For all problems provide the following as warranted. SHOW ALL WORK: Null hypothesis; Alternative hypothesis; appropriate variables such as variance, sample mean etc; a sketch of the normal distribution curve with the appropriate critical value(s), critical (reject) area(s), and test value shown; a written statement on whether the null hypothesis is to be reject based on the provided evidence. Please ask for clarification on these directions if needed. 5) A random sample 60 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $17.21 per car. The population standard deviation is $5.63. Estimate the mean bill for all cars from the drive-thru with 96% confidence.
For all problems provide the following as warranted. SHOW ALL WORK:
Null hypothesis; Alternative hypothesis; appropriate variables such as variance, sample mean etc; a sketch of the
5) A random sample 60 cars in the drive-thru of a popular fast food restaurant revealed an average bill of $17.21 per car. The population standard deviation is $5.63. Estimate the mean bill for all cars from the drive-thru with 96% confidence.
Form the given information,
Margin of error:
The critical value for 96% confidence level for two-tailed is 2.05 obtained from the standard normal table.
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