7. manny charges $1.25 for a cup of
temonade at the lemonade stand. he sells 9
cups. how much money does manny
collect?

Step-by-step explanation:

We have bar x = 934

S = 616

n = 12

A.

Null hypothesis: h0: u = 1250

Alternative hypothesis: h1: u< 1250

B. To get the t test statistic

T = 934-1250/616/√12

T = -316/616/3.4641

= -316/117.824

= -1.777

C. O value = p(t<-1.777)

This gives 0.0516

D. At 10% significance

O.0516<0.1 so we reject the null hypothesis and conclude that this deduction is < than 1250

At 5% level of significance

O.o516>0.05. we do not reject the null hypothesis. We conclude there is insufficient evidence of claim being less than 1250