Hypotheses

Question 1

Hull vs Alternate Hypotheses

Answer 1

Ho- starting point. No difference. How far from zero. Role chance played on results.

Ha- want to prove their is a difference.

Question 2

Central tendency

Answer 2

Mean-average

Median-point above and below which 50% of the cases fall

Mode-most frequent value

-If mean is greater than the median, the data skewed to the left-If mean is greater than the median, the data skewed to the right

Question 3

Dispersion/Variability

Answer 3

Variance- mean of the squared deviations from the population mean. Distance from mean.

Standard Deviation- squat root of the variance

Question 4

Statistical significance

Answer 4

A way to determine the role that chance may play for any given research findings…

Alpha=0.5 (5% chance of error)

Question 5

Type I vs Type II error

Answer 5

I- calling something different when it is not different. False positive

II- identifying populations as being the same when they are actually different (very difficult to avoid). False negative

Question 6

Kolmogorov-Smirnov

Answer 6

• Combines skewness and Kurtosis. Tests how far away from normality.
• Ho=data approximate a normal distribution.
• Significant KS test means a deviation from normaility

Question 7

Central limit theorem

Answer 7

Higher sample size the lower the margin of erroe