In a study of media usage versus education level (American Demographics, Vol. 17, No. 6), media usage versus household income also was considered. The media usage indices for the various media and income levels follow.MediaIncome LevelCable

NetworkPrime-Time

TVRadioNewspaperMagazineLess than $20,00078112898091$20,000-$39,9999710510097100$40,000-$74,99911392106111105$75,000 or more12194107121105Source: FromAmerican Demographics, Vol. 17, No. 6. Reprinted with permission, copyright 1995American Demographics, Ithaca, NY.Minitab Printout for Media/Income DataAnalysis of Variance for IndexSourceDFSSMSFPIncome310783592.770.088Media41540.030.998Error121558130Total192651

(a) List the factors and the number of levels of each factor. (Select all that apply.)

income level, with four levels

education, with four levels

income level, with three levels

media type, with five levels

media usage, with two levels

media type, with four levels

(b) Assume there is no interaction between the factors. Use two-way ANOVA and the Minitab printout to determine if there is a difference in population mean index based on income. Use=0.05.F=P-value=At the5%level of significance,

---Select---

do not reject

reject

H₀.

The data

---Select---

do not indicate any differences

indicate differences

in population mean index according to income level.

(c) Determine if there is a difference in population mean index based on media. Use=0.05.F=P-value=At the5%level of significance,

---Select---

do not reject

reject

H₀.

The data

---Select---

do not indicate any differences

indicate differences

in population mean index according to media type.