Step-by-step explanation:
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Answer:
Step-by-step explanation:
a)
zo=(89.0-92.2)/sqrt((1.5/15)+(1.2/20))
zo=-8.00
p-value=0.0000
Reject the null hypothesis.
b)
95% confidence interval for difference
=(89-92.2)+/-1.96*sqrt((1.5/15)+(1.2/20))
=-3.2+/-0.78
=(-3.98, -2.42)
Answer: < > > =
Step-by-step explanation:
Number of bottles of juice are needed for 24 students = 4
Number of bottles of juice are needed for 42 students = 7
<h3><u>Solution:</u></h3>
Given that cafeteria worker knows that it takes 3 bottles of juice to serve a table of 18 students
<em><u>To find :</u></em>
1) Number of bottles of juice are needed for 24 students
2) Number of bottles of juice are needed for 42 students
Since its given that 3 bottles of juice to serve a table of 18 students
So, number of bottles required for one student is given as:
Let "a" be the number of bottles required for one student
18 students ⇒ 3 bottles
1 student ⇒ "a" bottles
On cross multiplication we get,

<h3><em><u>
Finding number of bottles of juice are needed for 24 students:</u></em></h3>
number of bottles of juice are needed for 24 students = 24 x number of bottle required for 1 student

<h3><em><u>
Finding number of bottles of juice are needed for 42 students:</u></em></h3>
number of bottles of juice are needed for 42 students = 42 x number of bottle required for 1 student

- 4(1/2)x - (3/7) = (1/4)
- 4(1/2)x = (1/4) + (3/7)
- (9/2)x = (7+12)/28
-(9/2)x = 19/28
x = (19/28) * 2 / 9
x = (19/14) / 9
x = 19 / (14*9)
x = 19 / 126