Elementary Statistics Project 3: Survey Data

For this semester all students will use the same questions and data set for the Unit 3 Project. One question

elicits a numeric value and the other question a non-numeric value (limited to two possible responses).

Thirty people were asked both of the questions. The responses were recorded in the attached table. You

will be using those responses to complete numbers 1-20.

Questions

Numeric: How much do you spend on gas each week?

Non-numeric: Do you think professional sports are fixed?

Use your numeric data values only to complete numbers 1-13:

1) Is the numeric variable qualitative or quantitative?

2) Is the numeric variable discrete or continuous?

3) Is the numeric variable at the nominal, ordinal, interval or ratio level of measurement?

4) List the mean ______________________________________________

5) List the standard deviation ____________________________________

6) List the sample size_______________________________

7) List the degrees of freedom_______________________________

8) List the standard error of the means_______________________________

9) Assume your data is normally distributed. What percentage of your data values fall within 1 standard

deviation of your sample mean? ___________

10) Assume your distribution is normal. Find the cutoff score for the top 20% of your data

values. ____________

11) Standardize the first score in the data set. ________________

12) Find the percentile for the first score in the data set. ________

13) Create a 90% confidence interval about the sample mean. ______________________

Use your non-numeric data values only to complete numbers 14-20:

14) Is the non-numeric variable quantitative or qualitative?

15) Is the non-numeric variable at the nominal, ordinal, interval or ratio level of measurement?

16) List the sample size____

17) List the sample proportion for the "yes" answers_______

18) List the mean assuming the "yes" answers make up the sample proportion_______

19) List the standard deviation assuming the "yes" answers make up the sample proportion._____

20) Create a 99% confidence interval about the sample proportion of "yes" answers. ______