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SPSS/Statistics (Questions & Answers)
Everything you need to know about:
- α-level
- β-level
- Central limit theorem
- Confidence interval
- Degrees of freedom
- Deviance
- Effect size
- Fit
- Linear model
- Meta-analysis
- One-tailed test
- Population
- Power
- Sample
- Sampling distribution
- Sampling variation
- Standard deviation
- Standard error
- Standard error of the mean (SE)
- Sum of squared errors (SS)
- Test statistic
- Two-tailed test
- Type I error
- Type II error
- Variance
SPSS/Statistics (Questions & Answers)
Everything you need to know about:
- Predictor variable
- Probability distribution
- Qualitative methods
- Quantitative methods
- Quartile
- Randomization
- Range
- Ratio variable
- Reliability
- Repeated-measures design
Second quartile - Skew
- Systematic variation
- Tertium quid
- Test–retest reliability
- Theory
- Unsystematic variation
- Upper quartile
- Validity
- Variables
- Within-subject design
- z-scores
Calculating sums of squares, variance, standard deviation, standard error and 95% confidence interval
Question
The time taken for 21 heavy smokers to fall off a treadmill at the fastest setting is (18, 16, 18, 24, 23, 22, 22, 23, 26, 29, 32, 34, 34,
36, 36, 43, 42, 49, 46, 46, 57) minutes.
Calculate the:
- sums of squares,
- variance,
- standard deviation,
- standard error and
- 95% confidence interval of these data.