focus groups of 11 ppl are randomly selected to discuss products of the yummy company .it is determined that the mean number (per group)Who recognize the yummy brand name is 7.8,and the deviation is 0.97.would it be unusual to select 11 people and find that fewer than 4 recognize the yummy brand name.

Answer 1

Ho: no significant difference (4 = 7.8)
H1: 4 < 7.8

Z = (x - μ)/SD

Z = (4 - 7.8)/.97

Look up the Z value in table of areas under normal distribution in the back of your statistics text. If the smaller value is less than the significance level you are using (P ≤ .05?), reject your null hypothesis.

I hope this helps.

Answer 2

thanks