Answer:
The difference in the sample proportions is not statistically significant at 0.05 significance level.
Step-by-step explanation:
Significance level is missing, it is α=0.05
Let p(public) be the proportion of alumni of the public university who attended at least one class reunion
p(private) be the proportion of alumni of the private university who attended at least one class reunion
Hypotheses are:
: p(public) = p(private)
: p(public) ≠ p(private)
The formula for the test statistic is given as:
z=
where
- p1 is the sample proportion of public university students who attended at least one class reunion (
)
- p2 is the sample proportion of private university students who attended at least one class reunion (
)
- p is the pool proportion of p1 and p2 (
)
- n1 is the sample size of the alumni from public university (1311)
- n2 is the sample size of the students from private university (1038)
Then z=
=-0.207
Since p-value of the test statistic is 0.836>0.05 we fail to reject the null hypothesis.
Answer:
450 miles , $90.5
Step-by-step explanation:
Let d be the miles driven
59 + 0.07d = 50 + 0.09d
d = 450
The two plans cost the same when he drives for 450 miles which the respective cost is 59 + 0.07(450) = $90.5
Answer:
0,0,0,1,3,5,9 I put it in order
You will pay $29.40 for the sweater
You will pay $60.00 on boots and
You will pay $25.50 for the jeans
You will save $32.01 in total
Answer:
<em>(B). - 3 ≤ x < 1 </em>
Step-by-step explanation:
Given expression is defined for
1). x + 3 ≥ 0 ⇒ x ≥ - 3
and
2). 1 - x > 0 ⇒ x < 1
<em>- 3 ≤ x < 1</em>