(1 point) Starting salaries of 115 college graduates who have taken a statistics course have a mean of $44,215. Suppose the distribution of this population is approximately normal and has a standard deviation of $10,288. Using a 93% confidence level, find both of the following: (NOTE: Do not use commas or dollar signs in your answers.) (a) The margin of error: equation editor Equation Editor (b) The confidence interval for the mean μ μ
sample mean, xbar = 44215
sample standard deviation, σ = 10288
sample size, n = 115
Given CI level is 93%, hence α = 1 - 0.93 = 0.07
α/2 = 0.07/2 = 0.035, Zc = Z(α/2) = 1.81
a)
ME = zc * σ/sqrt(n)
ME = 1.81 * 10288/sqrt(115)
ME = 1736.44
b)
CI = (xbar - Zc * s/sqrt(n) , xbar + Zc * s/sqrt(n))
CI = (44215 - 1.81 * 10288/sqrt(115) , 44215 + 1.81 *
10288/sqrt(115))
CI = (42478.56 , 45951.44)
(1 point) Starting salaries of 115 college graduates who have taken a statistics course have a...
(1 point) Starting salaries of 110 college graduates who have taken a statistics course have a mean of $42,249. Suppose the distribution of this population is approximately normal and has a standard deviation of $10,823. Using a 93% confidence level, find both of the following: (NOTE: Do not use commas or dollar signs in your answers.) (a) The margin of error: ? (b) The confidence interval for the mean μ: ? <μ< ?
Starting salaries of 70 college graduates who have taken a statistics course have a mean of $44,644. Suppose the distribution of this population is approximately normal and has a standard deviation of $9,466. Using a 93% confidence level, find both of the following: (NOTE: Do not use commas or dollar signs in your answers.) (a) The margin of error: :
part A please (1 point) Starting salaries of 100 college graduates who have taken a statistics course have a mean of $44,811. Suppose the distribution of this population is approximately normal and has a standard deviation of $9,895. Using a 98% confidence level, find both of the following: (NOTE: Do not use commas nor dollar signs in your answers.) (a) The margin of error: 499 (b) The confidence interval for the mean u: 42509.4 <u< 47112.6 Note: Round your answers...
(2 pts) Starting salaries of 140 college graduates who have taken a statistics course have a mean of $44,102. Suppose the distribution of this population is approximately normal and has a standard deviation of $9,696. Using a 90% confidence level, find both of the following (NOTE: Do not use commas nor dollar signs in your answers.) (a) The bound on the estimate is (b) The confidence interval for the mean u
Starting salaries of 64 college graduates who have taken a statistics course have a mean of $44,500 with a standard deviation of $6,800. Find a 99.7% confidence interval for μ. (NOTE: Do not use commas or dollar signs in your answers. Round each bound to three decimal places.) Lower bound: Upper bound:
starting salaries of 80 college graduates who have taken a statistics course to have a mean of $42,778 suppose the distribution of this population is approximately normal and has a standard deviation of $ 10,769. using an 81% confidence level, find both of the following the marine of error the confidence interval for the mean u: <U<
Starting salaries of 90 college graduates who have taken a statistics course have a mean of $43,993 and a standard deviation of $9,144. Using 99% confidence level, find the following: A. The margin of error E: B. The confidence interval for the mean μ:
(10 points) Starting salaries of 64 college graduates who have taken a statistics course have a mean of $44,500 with a standard deviation of $6,800. Find an 90% confidence interval for u. (NOTE: Do not use commas or dollar signs in your answers. Round each bound to three decimal places.) Lower-bound: Upper-bound:
(10 points) Starting salaries of 64 college graduates who have taken a statistics course have a mean of $44,500 with a standard deviation of $6,800. Find a 99.7% confidence interval for u. (NOTE: Do not use commas or dollar signs in your answers. Round each bound to three decimal places.) Lower-bound: Upper-bound:
Starting salaries of 64 college graduates who have taken a statistics course have a mean of $43,500 with a standard deviation of $6,800. Find a 68% confidence interval for μ.