Tag | Value |
---|---|
file | Inferential_Statistics_uva-confidence-level-786-en_uva-confidence-level-786-en |
name | uva-confidence-level-786-en |
section | Inferential Statistics/Confidence Intervals/Confidence level |
type | schoice |
solution | FALSE, TRUE, FALSE |
Type | Calculation |
Language | English |
Level | Statistical Literacy |
IRT-Difficulty | 4.18 |
p-value | 0.0877 |
A study is looking at whether the new drug Koburol reduces symptoms reduces symptoms in people with psychosis. First, the drug is being tested on a small scale testing. If the results are positive, it will be tested on a larger group of individuals. The researcher will measure the presence of symptoms by having participants complete a questionnaire. Two months after the participants have started, the researcher will take the questionnaire again with the same subjects. The scores are shown in table below.
———– —— —- Participant Before After 1 85 81 2 75 70 3 80 74 ———– —— —-
The average of the difference scores (before – after) is = 5 and the standard deviation of the difference scores Sd = 0.82. Calculate the 95% confidence interval for the difference between the population averages of the participants before and after using Koburol._____________________. The 95% confidence interval for the difference between the population averages is