stats 2-2

Question 1

STATS 2-2

Frequency Distribution

Answer 1

a.k.a. frequency table
show how data are partitioned among several categories (or classes,) by listing the categories along with the number (frequency) of data values in each of them.

Question 2

STATS 2-2

Lower class limits

Answer 2

The smallest numbers that can belong to the different classes.

Question 3

STATS 2-2

Upper class limits

Answer 3

the highest value that can belong to a class

Question 4

STATS 2-2

Class boundaries

Answer 4

The numbers used to separate the classes, but without the gaps created by class limits.

Question 5

STATS 2-2

class midpoints

Answer 5

the values in the middle of the classes

Question 6

STATS 2-2

Class Width

Answer 6

the difference between 2 consecutive lower class limits (or two consecutive lower class boundaries) in a frequency distribution

Question 7

STATS 2-2

Class width

Answer 7

(maximum data value)-(minimum data value)/ number of classes

Question 8

STATS 2-2

Relative frequency for a class

Answer 8

Frequency for a class/sum of all frequencies

Question 9

STATS 2-2

Percentage of a class

Answer 9

(frequency for a class/sum of all frequencies) × 100

Question 10

STATS 2-2

cumulative frequency distribution

Answer 10

the frequency for each class is the sum of the frequencies for that class and all previous classes.

Question 11

STATS 2-2

Normal Distribution

Answer 11

The frequencies start low, then increase to some maximum frequency, then decrease to a low frequency.
The distribution should be approximately symmetric, with frequencies evenly distributed on both sides of the maximum frequency.

Bell shaped curve.