A survey of 300 bhcc students was conducted and they were asked to respond with

Question

A survey of 300 bhcc students was conducted and they were asked to respond with the number of classes they were currently taking.

A) identify the individuals in the study

B) identify the variable being collected

C) is the variable quantitative or qualitative?

D) what is the sample size?

E) what is the implied population of this study?

2) the results of the survey from question #1 are shown in below in a partial frequency table below.

# of class

frequency

1

35

2

55

3

60

4

65

5

85

A) find the mode of the data

B) find the median of the data

C) find the mean of the data( round to two decimal places).

3) the college registrar's office record the number of students receiving a grade of incomplete.the results for the past twenty quarters ranged from the smallest value of 31 students to the largest value of 80 students.

Complete the frequency table below using 5 classes.find the class width and fill in the value for.class limit, midpoint, class boundaries, relative frequency and cumulative frequency.use the frequency values already listed in the chart

Class limit

f

midpoint

Class boundaries

Relative frequency

Cumulative frequency

5

2

4

6

3

B) sketch a frequency histogram for the information from part a.); making sure to label everything that needs to labeled.

C) what range of values for the number of the students( classes limit) makes up 20% of the total sample size?

D) what range of values for the number of students( classes limit) includes the median of the data?

4) a random sample of 7 people who went on a diet recorded their weight loss( in pounds) after 3 months, the results were as follows:

Weight loss (in lbs):

10

`14

15

13

6

18

8

For the sample data above,find the following.

A) the sample mean

B) fill in the following table

x

             _

     (X - X)

       _

(X - X)^2

x

x^2

C) use the info from the table above to compute the standard deviation.show the calculation twice using both the defining formula and the computational formula.

D) if the above data was population data instead of sample data, would the mean be different? If yes, what would it be?

E) if the above data was population data as opposed to sample data, would the standard deviation be different? If yes, what would it be?

# of class

frequency

1

35

2

55

3

60

4

65

5

85

Explanation / Answer

Q1.A) The individuals in this study are students of bhcc.

B) Variable is the number of classes they were currently taking.

C) The variable is quantitative.

D) sample size = 300

E) Population of study is students of bhcc.

Q2. A) 5 classes taking is the mode of the data.

B) 3 classes taking is the median of the data.

C) The mean of the data is = 3.366667 =3.67 classes

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