Q2-Summative Test 2.1-Confidence Intervals

Which of these values is a parameter?

• $\overline{X}$

• X

• $\mu$

• z

What do you call processes involved in making conclusions about population values?

• Estimating parameters

• Hypothesis Testing

• Inferential Statistics

• Descriptive Statistics

Subsets of populations are called:

• samples

• elements

• estimates

• averages

Which of the following best represents the central value of a set of data?

• Variance

• Average

• Proportion

• Standard Deviation

What do you call a single value that may refer to a parameter value?

• Z satistic

• T statistic

• Point Estimate

• Interval Estimate

The ____________ is a range of values that contains the parameter value.

• Confidence limits

• Confidence Intervals

• Confidence coefficient

• Confidence level

What do we call the probability that a parameter is contained in a range of values?

• Confidence level

• Confidence limit

• Confidence coefficient

• Confidence interval

Which of the following shows graphical results in making inferences about population values?

• Pie graph

• Bar graph

• Trend line

• Normal curve

Which of the following are the 95% confidence coefficients?

• $\pm1.645$

• $\pm1.96$

• $\pm2.33$

• $\pm2.58$

When

 $\alpha$  =0.01, the critical values are:

•  $\pm1.645$  

•  $\pm1.96$  

•  $\pm2.33$  

•  $\pm2.58$