# Data missing for question? :\

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Treat the data obtained *in the Sullivan Statistics Survey* in response to the following question as a simple random sample of adult Americans: "If you own a cell phone, what was your cell phone bill last month? Express answers to the penny."

1. Draw a histogram of the data and comment on the shape.

2. Draw a boxplot of the data. Are there any outliers?

3. Based on the results to parts (1) and (2), explain why a large sample size might be desirable to construct a confidence interval for the mean monthly cell phone bill.

4. Use statistical software to determine the point estimate of the mean monthly cell phone bill.

5. Use statistical software to construct a 95% confidence interval for the mean monthly cell phone bill.

*What data?*

Also, what is the Sullivan Statistics Survey...?

Treat the data obtained *in the Sullivan Statistics Survey* in response to the following question as a simple random sample of adult Americans: "If you own a cell phone, what was your cell phone bill last month? Express answers to the penny."

1. Draw a histogram of the data and comment on the shape.

2. Draw a boxplot of the data. Are there any outliers?

3. Based on the results to parts (1) and (2), explain why a large sample size might be desirable to construct a confidence interval for the mean monthly cell phone bill.

4. Use statistical software to determine the point estimate of the mean monthly cell phone bill.

5. Use statistical software to construct a 95% confidence interval for the mean monthly cell phone bill.

*What data?*

*What data?*

Also, what is the Sullivan Statistics Survey...?

##### 1 Answer

See explanation.

#### Explanation:

If the data are not given in a textbook or file provided by the instructor, this may be what you are looking for:

https://www.statcrunch.com/app/index.php?dataid=450205

Searching on Google for "Sullivan statistics survey" brings up the above as the first result.

Also, it appears as though the Sullivan Statistics Survey is used to collect data on cell phone usage, similar to how Nielsen ratings are used to collect data on television usage. (This is a best-guess.)