Super easy pls help now
1 answer:
You might be interested in
<h2>Answer with explanation:</h2>
Let p be the population proportion of parents who had children in grades K-12 were satisfied with the quality of education the students receive.
Given : Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of education the students receive.
Set hypothesis to test :
Sample size : n= 1055
Sample proportion :
Critical value for 95% confidence :
Confidence interval :
Since , Confidence interval does not contain 0.39.
It means we reject the null hypothesis.
We conclude that 95% confidence interval represents evidence that parents' attitudes toward the quality of education have changed.
STEP 1
Mean =
STEP 2
Subtract the mean from each data value then square the answer
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
⇒ 
STEP 3
Add the squared answers in STEP 2 then find the mean
STEP 4
Square root the answer in STEP 3
Standard deviation is 236.5
Mean =
STEP 2
Subtract the mean from each data value then square the answer
STEP 3
Add the squared answers in STEP 2 then find the mean
STEP 4
Square root the answer in STEP 3
Standard deviation is 236.5