Question

Construct a 99% confidence interval to estimate the population mean using the data below what assumptions need to be made about hs population? x35 $-9.1 n 23 Click here to view page table 99% confidence interval for the population means from a lower int at']to an upper limit of Round to two decimal places as needed) What assumptions need to be made about this population? O A. The population distribution is skewed to one side O B. The population follows the Students t-distribution O C. The population follows the normal probablity distribution O D. The population size is larger than 30 th olut newo Click to select your answers)

Answer 1

Here we have: x = 35 S 9.1 n 23 α 1-0.99 0.01 (99% confidence level) df n-1-23-1-22 Critical value: tcrit ta/nydf to.01/2,22 12.819 tarit- tafto.o1/2,22

:35 ± 2.819 *9.1 /23 35 ± 5.35 29.65 <u < 40.35 Correct option "B" the student's t di The population follows th