A random sample of six salespersons that attended a motivational course on sales techniques was monitored three months before and three months after the course, The table shows the values of sales (in thousands of dollars) generated by these six salespersons in the two periods. Salesperson Before the Course After the Course D 213 239 289 197 283 190 346 319 171 200 194 6. 182 Assume that the population distributions are normal. Find a 95% confidence interval for the difference between the two population means. What is the confidence interval estimate of the mean difference (ater "Hbefore)? (Round to two decimal places as needed.)

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A random sample of six salespersons that attended a motivational course on sales techniques was monitored three months before and three months after the course. The table shows the
values of sales (in thousands
Salesperson Before the Course After the Course D
213
dollars) generated by these six salespersons in the two periods.
239
289
283
197
190
319
346
194
171
200
182
Assume that the population distributions are normal. Find a 95% confidence interval for the difference between the two population means.
What is the confidence interval estimate of the mean difference (Hater Hbefore)?
(Round to two decimal places as needed.)
Transcribed Image Text:A random sample of six salespersons that attended a motivational course on sales techniques was monitored three months before and three months after the course. The table shows the values of sales (in thousands Salesperson Before the Course After the Course D 213 dollars) generated by these six salespersons in the two periods. 239 289 283 197 190 319 346 194 171 200 182 Assume that the population distributions are normal. Find a 95% confidence interval for the difference between the two population means. What is the confidence interval estimate of the mean difference (Hater Hbefore)? (Round to two decimal places as needed.)
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