Questions from Essentials of Statistics

Q: We stated earlier that a one-way ANOVA test is always

We stated earlier that a one-way ANOVA test is always right tailed because the null hypothesis is rejected only when the test statistic, F, is too large. Why is the null hypothesis rejected only when...

Q: A CNN/USA TODAY poll conducted by Gallup asked a sample

A CNN/USA TODAY poll conducted by Gallup asked a sample of employed Americans the following question: “Which do you enjoy more, the hours when you are on your job, or the hours when you are not on you...

Q: Following are the notations for the three sums of squares. State

Following are the notations for the three sums of squares. State the name of each sum of squares and the source of variation each sum of squares represents. a. SSE b. SSTR c. SST

Q: Although the chi-square homogeneity test and the chi-square

Although the chi-square homogeneity test and the chi-square independence test use essentially the same basic procedure, the context of the two tests are quite different. Explain the difference.

Q: State the one-way ANOVA identity, and interpret its meaning

State the one-way ANOVA identity, and interpret its meaning with regard to partitioning the total variation in the data.

Q: The following table presents information on the Kelley Blue Book’s “10

The following table presents information on the Kelley Blue Book’s “10 Best Green Cars of 2013.” Note that mpg and mpge are abbreviations for miles per gallon and miles per gallon equivalent, respecti...

Q: For what purpose is a chi-square homogeneity test used?

For what purpose is a chi-square homogeneity test used?

Q: True or false: If you know any two of the three

True or false: If you know any two of the three sums of squares, SST, SSTR, and SSE, you can determine the remaining one. Explain your answer.

Q: Consider a variable of several populations. Define the terms homogeneous and

Consider a variable of several populations. Define the terms homogeneous and nonhomogeneous in this context.

Q: In each part, specify what type of analysis you might use

In each part, specify what type of analysis you might use. a. To study the effect of one factor on the mean of a response variable b. To study the effect of two factors on the mean of a response varia...