• 0

A PHP Error was encountered

Severity: Notice

Message: Undefined index: userid

Filename: views/question.php

Line Number: 192


File: /home/noqkocv1izd6/public_html/application/views/question.php
Line: 192
Function: _error_handler

File: /home/noqkocv1izd6/public_html/application/controllers/Questions.php
Line: 416
Function: view

File: /home/noqkocv1izd6/public_html/index.php
Line: 315
Function: require_once

A survey of 25 randomly selected customers found the ages shown​ (in years). The mean is 32.24  years and the standard deviation is 9.68  years.
​a) How many degrees of freedom does the​ t-statistic have?
​b) How many degrees of freedom would the​ t-statistic have if the sample size had been 400