Statistics

ohm.lumenlearning.com Content Institution Page Unit 9 Homework Score: 0/20 0/20 answered . Question 2 Assume that a sample is used to estimate a population proportion p. Find the 99% confidence interval for a sample of size 309 with 121 successes. Enter your answer as an open-interval (i.e., parentheses) using decimals (not percents) accurate to three decimal places. 99% C.I. = Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Hint: You should use Confidence Interval MS Excel Template or Minitab or this website(mathcracker.com) to calculate the confidence interval. Question Help: Video Message instructor Calculator Submit Question DII 80 Q F2 F3 FA F5 F7 @ohm.lumenlearning.com Content Institution Page Score: 3/20 4/20 answered .Question 17 Spinning a coin, unlike tossing it, may not give heads and tails equal probabilities. I spun a penny 200 times and got 85 heads. We wish to find how significant is this evidence against equal probabilities. a. What is the sample proportion of heads? Round to 3 places. b. Heads do not make up half of the sample. Is this sample evidence that the probabilities of heads and tails are different? Take p to be the probability of getting heads in a spin of a penny. Which hypotheses do we want to test? Ho: p * 0.5 Ha: p = 0.5 O Ho: p = 0.5 Ha: p 0.5 c. Compute the z test statistic. 2 = Round to 2 places . DII DD 20 Q FB F9 5 F2 F4 F6 F7 F3ohm.lumenlearning.co Content Institution Page Unit 9 Homework Score: 0/20 0/20 answered .Question 13 If n=500 and p (p-hat) =0.52, find the margin of error at a 99% confidence level Give your answer to three decimals. Hint: You should use Confidence Interval MS Excel Template or Minitab or this website(mathcracker.com) to calculate the confidence interval. Question Help: Video Message instructor Calculator Submit Questionohm.lumenlearning.com Content Institution Page Unit 9 Homework Score: 0/20 0/20 answered Question 7 Out of 200 people sampled, 40 had kids. Based on this, construct a 90% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places