known to be normally distributed with a standard deviation of $2.50. The last seven times John has taken a taxi from Logan to downtown Bosto Question known to be normally distributed with a standard deviation of$2.50. The last seven times John has taken a taxi from Logan to downtown Boston, the fares have been $22.10,$23.25, $21.35,$24.50, $21.90,$20.75, and $22.65. Construct a 95% confidence interval for the population mean. in progress 0 2 weeks 2021-09-15T07:21:16+00:00 1 Answer 0 Answers ( ) 1. Answer: The 95% confidence interval for the population mean is between$20.51 and $24.21. Step-by-step explanation: The first step to find this question is find the sample mean Confidence interval We have that to find our level, that is the subtraction of 1 by the confidence interval divided by 2. So: Now, we have to find z in the Ztable as such z has a pvalue of . So it is z with a pvalue of , so Now, find M as such In which is the standard deviation of the population and n is the size of the sample. The lower end of the interval is the sample mean subtracted by M. So it is 22.36 – 1.85 =$20.51

The upper end of the interval is the sample mean added to M. So it is 22.36 + 1.85 = $24.21 The 95% confidence interval for the population mean is between$20.51 and \$24.21.