Homework 2/24
Homework 2/24
1. Jessica surveyed students at her school about their favorite food. She
recorded the responses in the table below:
Favorite Food Pizza
Chicken Steak French Fries Totals
1. Jessica surveyed students at her school about their favorite food. She
recorded the responses in the table below:
Favorite Food Pizza
Chicken Steak French Fries Totals
Males
14
10
6
7
Males
14
10
6
7
Females
12
13
4
8
Females
12
13
4
8
Totals
Totals
a. Calculate the marginal frequency for each type of food.
a. Calculate the marginal frequency for each type of food.
b. What is the joint frequency for female students who prefer pizza?
b. What is the joint frequency for female students who prefer pizza?
c. What is the joint frequency for male students who prefer steak?
c. What is the joint frequency for male students who prefer steak?
d. What percent of the students like chicken?
d. What percent of the students like chicken?
e. What percent of the students are girls?
e. What percent of the students are girls?
2. Use the histogram to answer the following questions:
2. Use the histogram to answer the following questions:
a. Estimate the mean and median of
the data.
a. Estimate the mean and median of
the data.
b. How many data values are greater
than or equal to 40?
b. How many data values are greater
than or equal to 40?
c. How many total data values are
there?
c. How many total data values are
there?
d. Using this total number of data values, calculate which interval the median
would be located. (median means half is below and half is above)
(FLIP OVER)
d. Using this total number of data values, calculate where the median would
be located. (median means half is below and half is above)
(FLIP OVER)
3. The following data shows homerun data for Mark McGuire.
4
3
2
4
2
3
3
1
1
3
4
4
2
1
a. Create a histogram for the data.
3
2
b. Calculate the mean and median
for the data. Highlight or make an
indicator of where these lie on
the histogram.
6
5
4
3. The following data shows homerun data for Mark McGuire.
4
3
2
4
2
3
3
1
1
3
4
4
2
1
a. Create a histogram for the data.
3
2
b. Calculate the mean and median
for the data. Highlight or make an
indicator of where these lie on
the histogram.
6
5
4
3
3
c. Explain what the mean and
median tell about the data for
Mark McGuire.
2
1
1
2
3
4
5
6
c. Explain what the mean and
median tell about the data for
Mark McGuire.
2
1
1
4. The resting pulse rates were recorded for a boys’ gym class before they
exercised. The results are shown below:
75
77
81
77
75
83
76
75
77
76
80
75
75
78
83
76
77
78
76
84
76
77
76
80
76
78
75
77
82
76
a. Create a histogram for the resting pulse rates.
2
3
4
5
6
4. The resting pulse rates were recorded for a boys’ gym class before they
exercised. The results are shown below:
75
77
81
77
75
83
76
75
77
76
80
75
75
78
83
76
77
78
76
84
76
77
76
80
76
78
75
77
82
76
a. Create a histogram for the resting pulse rates.
b. Estimate where you
think the mean and median
are located.
b. Estimate where you
think the mean and median
are located.
c. Calculate the mean and
median for the pulse rates.
Highlight or make an
indicator of where these lie
on the histogram.
c. Calculate the mean and
median for the pulse rates.
Highlight or make an
indicator of where these lie
on the histogram.
d. Explain what the mean
and median tell about the
pulse rates.
d. Explain what the mean
and median tell about the
pulse rates.