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L10 Quiz: Group MeetingQuestion 3Find the margin of error for a 90% confidence interval when the standard deviation is σ = 50 and n = 25. (Round to three decimal places.)Question 4Which of the following statements is true?σ2 is an interval estimator of x¯x¯is a point estimator ofμ.μis a point estimator of x¯σ is an interval estimator of σ2.526Gina wants to construct a 95% confidence interval for GMAT scores. She knows the standard deviation σ=113. She collects a simple random sample of size n=64 computes x¯=526..and Question 5What is the point estimate for the true GMAT score?Question 6What is the margin of error for the 95% confidence interval for the true GMAT score?Question 7What is the lower limit of this confidence interval? (Round to three decimal places.)