Confidence Interval with Known

A survey of 72 customers at a steak restaurant was conducted to assess the average for customers requesting a side order of broccoli. The sample size of 72 showed us that there is an average of 15 requests for broccoli from customers. Find a 98% confidence interval for the true population mean given that = 2.25 request for a side of broccoli.

Possible Answers:

15 +/- 1.3513

72 +/- 1.3513

72 +/- 0.6168

15 +/- 0.6168

Confidence Interval with Unknown

You have graduated from UNCW and have landed your dream job!!! You plan to treat yourself to a weeklong vacation to the Maldives. You search for an all-inclusive package and collect 6 prices:

$2500 $3200 $2700 $3100 $2950 $3800

If these prices were to predict the price you will pay for an all-inclusive trip to the Maldives, what is your best guess for the mean price? Compute a 99% confidence interval for the population mean price. Sample standard deviation = 452.1

Group of answer choices:

452.1 +/- 4.032

3041.7 +/- 744.2

452.1 +/- 2.576

3041.7 +/- 475.4

Confidence Interval for Population Proportion

A survey was conducted of 1500 homeowners with results showing that 1150 respondents desire covered back patios. Develop a 95% Confidence Interval for the population proportion.

Possible Answers:

1.30 +/- 0.0243

1.30 +/- 0.0213

0.77 +/- 0.0243

0.77 +/- 0.0213