The results of a one-way repeated-measures ANOVA with four levels on the independent variable revealed a significance value for Mauchly's test of p = 0.048.
What does this mean?

a) The assumption of sphericity has been violated.
b) The assumption of sphericity has been met.
c) This value can be ignored because sphericity is not an issue in a one-way repeated-measures ANOVA design.
d) That Tukey's test should be used.

I'm so close to finishing all these.

How to simply and write the answer n a whole number

An office supply company conducted a survey before marketing a new paper shredder designed for home use. in the survey, 80 % of the people who tried the shredder were satisfied with it. because of this high satisfaction rate, the company decided to market the new shredder. assume that 80 % of all people are satisfied with this shredder. during a certain month, 100 customers bought this shredder. find the probability that of these 100 customers, the number who are satisfied is 69 or fewer.