Question

3. A simple random sample of size n is drawn from a population that is normally distributed. The sample mean is found to be 108 and the sample standard deviation, s, is found to be 10. a) Construct a 96% confidence interval u if the sample size, n, is 25. 4. A random sample of 1005 adult Americans was asked "How would you prefer to pay for new road construction?" Results of the survey are below. Frequency Response 412 New tolls 181 Increase gas tax 412 No new roads

I need help with #4, plz

Answer 1

a.

Frequency No new roads Increase gas tax Frequency New Tolls 0 100 200 300 400 500

b.

Response	Frequency	Relative Frequency=f/sumf
New Tolls	412	0.4100
Increase gas tax	181	0.1801
No new roads	412	0.4100
Total	1005

c. For No New Road relative frequency is 0.41

Hence 41% of Americans answered that they would prefer "No New Road".