A smartphone manufacturer has five companies that make batteries that would be compatible with a certain model of phone. The manufacturer wants to offer its customers a battery with the longest battery life possible. The company randomly samples 10 batteries from each of the five companies and measures talk time.
a. Complete the ANOVA table. Report the values that should be in cells (i) to (vii), rounding the values to two decimal places if rounding is necessary
b. The intern doing this analysis for the company remembers some assumption about normality is required to perform the inference. What is this assumption?
i. The sample of 50 talk times should be normally distributed.
ii. The population of all talk times across all manufacturers represented by the 50 sampled talk times should be normally distributed
iii. Each of the five populations of talk times should be normally distributed
iv. Each of the five samples of talk times should be