Question

Hi, I needed some help with question 20.

thanks!

For problems 17 through 19, choose the appropriate level of measurement is. Choose from a) nominal b) ordinal o interval 1) Temperatures in Celsiuts at various depths of the ocean 18) Weights of m&ms in grams 19) Cntic ratings of movies on a scale from O stars to 4 stars 20) A consumer magazine wants to compare the lifetimes of ballpoint pens of three diferent toe (brand A, brand B, and brand C) The magazine takes a random sample of pens of each t then performs an ANOVA The researcher in charge of the analysis believes the pers approximately the same lifetimes ype and What does the acronym ANOVA stand for? a) b) State the null and alternate hypotheses for the ANOVA c) The Minitab results are printed below. What is your conclusion regarding the null hypothesis? Assume a is 0 05 One-way Analysis of Variance Analysis of Variance Source Factor Error Total DF 2 9 11 Ss 2744 7622 10366 MS 1372 847 0251 1.62 d) Do you agree with the researcher that the pens have the same mean lifetime? Expilan

Answer 1

17) option no C is correct.

Interval scale.

18) option no D is correct.

Ratio scale.

19) option no C is correct.

Interval scale.

20) a) ANOVA= Analysis of variance.

b) Ho: all means are equal

I.e. mu1=mu2=...=mu.n

H1: at least one mean are not equal.

I.e. mu1#mu2#...#mu.n

C) p value > 0.05 so accept Ho.

That means fail to reject Ho.

D) p value > 0.05 so accept Ho.

On the basis of results we can conclude that all means are equal.