please answer all parts and make sure your answers are correct and i promist yto

Question

please answer all parts and make sure your answers are correct and i promist yto give you a thumbs up. Thank you

7. -3 polnts DevoreStat9 .E.015. My Notes Ask Your Teacher Determine the confidence level for each of the following large-sample one-sided confidence bounds. (Round your answers to the nearest whole number.) (a) Upper bound: x 0.84s/Vn (b) Lower bound: X - 2.33s/n (c) Upper bound: x 0.67s/Vn You may need to use the appropriate table in the Appendix of Tables to answer this question Need Help?Read It Talk to a Tutor

Explanation / Answer

Ans:

a)z value is 0.84

So,Normsdist(0.84)=0.8

80% Confidence level

b)z value is -2.33

So,normsdist(-2.33)=0.01

99% confidence level

c)z value is 0.67

so,normsdist(0.67)=0.75

75% confidence level

2)

sample proportion=205/356=0.576

z value for 95% CI is 1.96

95% confidence interval for p

=0.576+/-1.96*sqrt(0.576*(1-0.576)/356)

=0.576+/-0.051

=(0.525,0.627)

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