Chãpitar Questionés

Question 1

What is the difference between interval and ratio scale?

Answer 1

Ratio can give perspective on differences (“Twice as big”), whereas interval is more based on numerical values with equal differences.

Basically the same thing?

Question 2

The endpoints of an interval is called the _____ & _____ .

Answer 2

Real Upper and Lower limits

Question 3

Which side does a positively skewed distribution encounter it’s highest concentration of data points?

Answer 3

Left side

Question 4

What do you can a distribution with two distinct peaks?

Answer 4

Bi-Modal distribution

Question 5

What is a good % to trim from each end of your data?

Answer 5

10-20%

Question 6

An unusually extreme score is known as a _____.

Answer 6

Outlier

Question 7

How far do the whiskers extend beyond their boxes in a box plot?

Answer 7

1.5 times the IQR

Question 8

The ordinate is what we previously called the ____.

Answer 8

Y axis

Question 9

What does a Z score represent?

Answer 9

The number of deviations above or below the mean.

ex. Z = 1.792 deviations above the mean

Question 10

How do we calculate Z scores?

Answer 10

Z = X-mean/standard deviation

Question 11

What is the 32nd percentile?

Answer 11

It is the point below which 32% of a distribution falls.