Investigating Data and Statistical Reasoning

A consumer confidence researcher asks several retailers to report the number of LCD televisions sold during a particular month. These numbers most likely represent what level of measurement?

• Ordinal

• Ratio

• Interval

• Nominal

A student evaluation of teaching effectiveness for a particular course asks students to respond to their level of agreement with several statements according to the scale 1 = Strongly Agree, 2 = Agree, 3 = Neutral, 4 = Disagree, and 5 = Strongly Disagree. The responses indicate what level of measurement?

• Ordinal

• Ratio

• Interval

• Nominal

The nominal level of measurement is represented in which variable below?

• Fear of Crime

• Temperature

• Marital Status

• Gender

• Income

The ordinal level of measurement is represented in which variable below?

• Confidence Level

• Gender

• Level of Agreement

• Height

• Age

A parametric statistical test is one that makes assumptions about the parameters (defining properties) of the population distribution(s) from which one's data are drawn.

• True

• False

What are the examples of Parametric Test?

• T-test

• One-way ANOVA

• Chi-Square Test of Independence

• Pearson r Correlation

• Regression

Which of the following tests is the non-parametric equivalent of Pearson r correlation?

• Kolmogorov-Smirnov Test

• Shapiro-Wilk Test

• Spearman Correlation

• Chi-square Test of Independence

What are the assumptions of a Parametric test?

• Normality of Data

• Homogeneity of Variances

• Linearity

Levene’s Test is used to test the equality of variances.

• True

• False

In hypothesis testing, a Type 2 error occurs when

• The null hypothesis is not rejected when the null hypothesis is true.

• The null hypothesis is rejected when the null hypothesis is true.

• The null hypothesis is not rejected when the alternative hypothesis is true.

• The null hypothesis is rejected when the alternative hypothesis is true.