Question

please show the steps and formulas needed in order to correctly answer each question. thank you in advance.

6) In a survey of 327 registered voters, 167 of them wished to see Mayor Waffleskate lose her next election. Find a point estimate for the proportion of registered voters who wish to see Mayor Waffleskate defeated 7) A survey of 800 women shoppers found that 17 % of them shop confidence interval for the true proportion of women shoppers who shop on impulse? impulse. What is the 98% on 8) A recent poll of 700 people who work indoors found that 278 smoke. If the researchers want to be 98% confident of their results to within 3.5 percentage points, how large a sample is necessary? 2 2 9) Find the values for x eft and xright for a 0.1 and n=41 X normally distributed. A sample of 17 SAT scores had a standard 78. Construct a 95% confidence interval for the population standard deviation o. 10) Scores on the math SAT are deviation s

Answer 1

Dear student, please post question one at a time. Here I am doing one additional question for your help.

6) Point estimated for the proportion of registered voters who wish to see Mayor defeated is

167 = 0.5107 327

7) The point estimate for the proportion of women that shop in impulse:

p0.17

CI PZa/P(1 - p) 2

for 98% confidence

Za2.3263

CI 0.17 t2.3263/0.17(1-0.17) 800

CI 0.17t 0.03 (0.14,0.20)