| One Sample T-Test | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 95% Confidence Interval | |||||||||||||||||
| statistic | df | p | Mean difference | Lower | Upper | Cohen's d | |||||||||||
| grade | Student's t | -2.54 | 32.00 | 0.016 | -3.45 | -6.22 | -0.69 | -0.44 | |||||||||
| Note. Hₐ population mean ≠ 75 | |||||||||||||||||
| Test of Normality (Shapiro-Wilk) | |||||
|---|---|---|---|---|---|
| W | p | ||||
| grade | 0.99 | 0.960 | |||
| Note. A low p-value suggests a violation of the assumption of normality | |||||
| Descriptives | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| N | Mean | Median | SD | SE | |||||||
| grade | 33 | 71.55 | 72 | 7.80 | 1.36 | ||||||
| Independent Samples T-Test | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 95% Confidence Interval | |||||||||||||||||||
| statistic | df | p | Mean difference | SE difference | Lower | Upper | Cohen's d | ||||||||||||
| grade | Student's t | 2.12 | 31.00 | 0.043 | 5.48 | 2.59 | 0.20 | 10.76 | 0.74 | ||||||||||
| Welch's t | 2.03 | 23.02 | 0.054 | 5.48 | 2.69 | -0.09 | 11.05 | 0.74 | |||||||||||
| Mann-Whitney U | 79.50 | 0.046 | 6.00 | -11.00 | -1.85e−5 | 0.74 | |||||||||||||
| Test of Normality (Shapiro-Wilk) | |||||
|---|---|---|---|---|---|
| W | p | ||||
| grade | 0.98 | 0.827 | |||
| Note. A low p-value suggests a violation of the assumption of normality | |||||
| Group Descriptives | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Group | N | Mean | Median | SD | SE | ||||||||
| grade | Anastasia | 15 | 74.53 | 76.00 | 9.00 | 2.32 | |||||||
| Bernadette | 18 | 69.06 | 69.00 | 5.77 | 1.36 | ||||||||
[1] 3
| Independent Samples T-Test | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| statistic | df | p | Mean difference | SE difference | Cohen's d | ||||||||||
| grade | Student's t | 2.12 | 31.00 | 0.043 | 5.48 | 2.59 | 0.74 | ||||||||
| Welch's t | 2.03 | 23.02 | 0.054 | 5.48 | 2.69 | 0.74 | |||||||||
| Test of Normality (Shapiro-Wilk) | |||||
|---|---|---|---|---|---|
| W | p | ||||
| grade | 0.98 | 0.827 | |||
| Note. A low p-value suggests a violation of the assumption of normality | |||||
| Group Descriptives | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Group | N | Mean | Median | SD | SE | ||||||||
| grade | Anastasia | 15 | 74.53 | 76.00 | 9.00 | 2.32 | |||||||
| Bernadette | 18 | 69.06 | 69.00 | 5.77 | 1.36 | ||||||||
[1] The jamovi project (2020). jamovi. (Version 1.2) [Computer Software]. Retrieved from https://www.jamovi.org.
[2] R Core Team (2019). R: A Language and environment for statistical computing. (Version 3.6) [Computer software]. Retrieved from https://cran.r-project.org/.