If Sophie gets $26.00 and Jack gets four times the amount as Sophie. How much do Jack get?
2 answers:
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Answer:
5.3 or 28
Step-by-step explanation:
+
=
36+=64
64-36=28
=5.29 or 5.3
Answer:
Given :An Internet survey was e-mailed to 6977 subjects randomly selected from an online group involved with ears. There were 1337 surveys returned.
To Find : Use a 0.01 significance level to test the claim that the return rate is less than 20%.
Solution:
n = 6977
x = 1337
We will use one sample proportion test
We are given that the claim is the return rate is less than 20%.
Formula of test statistic =
=
=
Refer the z table
P(z<-1.85)=0.0332
Significance level = 0.01=α
Since p value > α
So, we accept the null hypothesis .
So,the claim that the return rate is less than 20% is false.