| Tag | Value |
|---|---|
| file | Inferential_Statistics_vufsw-confidenceintervals-0104-en_vufsw-confidenceintervals-0104-en |
| name | vufsw-confidenceintervals-0104-en |
| section | inferential statistics/confidence intervals |
| type | schoice |
| solution | FALSE, FALSE, FALSE, TRUE |
| Type | test choice |
| Program | NA |
| Language | English |
| Level | statistical reasoning |
Suppose a researcher administered a questionnaire to 130 employees of a large company to assess how they rate their manager. The scores are between 1 (very negative) and 10 (very positive). He wants to find out whether people with a permanent contract [n=70] assess their manager differently from people with a temporary contract [n=60]. He therefore calculates the 95% confidence interval of the difference between the averages.
Which formula should be used in this case?