Plz do number 6. Its 5th grade math!
2 answers:
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<h2>Answer with explanation:</h2>
As per given , we have
, n=331
Critical value for 90% Confidence interval :
a) Confidence interval :
Hence, a 90% confidence interval for the proportion of Americans who decide to not go to college because they cannot a ord it :
b) Margin of error : E=1.5%=0.015
Formula for sample size :
For p =0.48 , we have
Hence, the required sample size to survey = 3002