8) You are planning to use a sample proportion p to estimate a population proportion, p. A sample size of 100 and a confidence level of 95% yielded a margin of error of 0.025. Which of the following will result in a larger margin of error? A: Increasing the sample size while keeping the same confidence level B: Decreasing the sample size while keeping the same confidence level C: Increasing the confidence level while keeping the same sample size D: Decreasing the confidence level while keeping the same sample size A) A and D B) A and C Q) B and D D) B and C turns out to be (1000,S100. If this interval was based on a 9) Suppose a 98% confidence interval for 9 sample of size n -22, explain what assumptions are necessary for this interval to be valid A) The population must have an approximately normal distribution. B) The sampling distribution of the sample mean must have a normal distribution C) The population of salaries must have an approximate t distribution. D) The sampling distribution must be biased with 21 degrees of freedom
