Quiz #2

For the following distribution, the cumulative frequency (cf) for X = 4 is Xf 51 42 32 24 13

11 switch answer to 12

​What is the total number of scores for the distribution shown in the following table?​ X f 4 3 3 5 2 4 1 2

14

Refer to the following table showing a frequency distribution of quiz scores.Note: Quiz scores are all whole numbers. Xf 56 45 35 23 12 Refer to Exhibit 2-2. If a score of X = 3 or higher is needed for a passing grade, how many individuals passed?

16 switch answer to 5

Refer to the following stem and leaf display showing a distribution of exam scores. 324 4659 51372 653 77 Refer to Exhibit 2-6. How many scores are shown in the distribution?

17 change answer to 14

For the data in the following table, what is the value of ΣX?​ X f 4 1 3 2 2 4 1 2

20

Refer to the following table showing a frequency distribution of quiz scores. Xf 56 45 35 23 12 Refer to Exhibit 2-2. How many individuals took the quiz?

21 switch answer to 5

A sample of n = 20 scores ranges from a high of X = 7 to a low of X = 3. If these scores are placed in a frequency distribution table, how many rows will the table have?

4 rows ? based on chegg this is wrong try 5 rows

Refer to the following graph showing a frequency distribution of quiz sterm-5cores.Note: Frequencies: f1=3; f2=4; f3=3; f4=2; f5=1 Refer to Exhibit 2-5. How many individual scores are represented in this graph? (What is the value of N?)

5 switch answer to 13

Which of the following statements is false regarding grouped frequency distribution tables? Group of answer choicesThe bottom score for each interval is a multiple of the interval width.The value for N can be determined by counting the number of intervals in the X column.An interval width should be used that yields about 10 intervals.Intervals are listed in descending order, starting with the highest value at the top of the X column.

Intervals are listed in descending order, starting with the highest value at the top of the X column. change answer to "An interval width should be used that yields about 10 intervals" is false regarding grouped frequency distribution tables.

​After recording the final grade (A, B, C, D, F) for each individual in a class of N = 26 students, the professor would like to display the grade distribution in a frequency distribution graph. What kind of graph should be used?

bar graph

For a distribution of exam scores, a percentile rank of 80% represents a higher score than a percentile rank of 60%

false

There is enough information in a grouped frequency distribution table to obtain a complete listing of the original set of scores.

false

You should use a grouped frequency distribution table whenever there are more than 15 or 20 scores in the distribution.

false

Which types of graphs are used for data from an interval scale?

histograms and polygons

If a set of scores is displayed in a frequency distribution polygon, what scale of measurement was used to measure the scores?

interval or ratio interval and ratio

Refer to the set of scores presented in the following table. Xf 51 41 34 22 12 Refer to Exhibit 2-1. How many individual scores are in the entire set?

n=10 switch answer to 5

In a distribution with positive skew, scores with the highest frequencies are ____.

on the left side of the distribution -In a distribution with positive skew, the scores with the highest frequencies are typically found on the lower end of the distribution.

Refer to the following graph showing a frequency distribution of quiz scores. Refer to Exhibit 2-5. This is an example of a ____ shaped distribution.

positive skewed try to look up this answer again

The width of the bars in a histogram is determined by ____.

the real limits of a score or class interval

A professor records the number of students who are absent each day for the semester. Because this is a discrete variable, a bar graph should be used to show the frequency distribution.

true