math 225N week 2 Exam Test with Verified Answers Graded A+
1. Question AgeFrequency
The frequency table below shows the ages of the RelativeFrequen-
students in a psychology lecture hall. cy
Complete the Relative Frequency column of the table. 1799120=0.0751818
Enter answers as an unsimplified fraction.
Provide your answer below:
Age. 17 18 19 20 21 22
Frequency. 9 18 27 30 21 15
Relative Frequency
2. Question Dividing each fre-
The relative frequencies for a set of data are shown in quency by the to-
the table below. tal number of data
ValueRelative Frequency10.1520.3030.4540.10 values gives the
If there are a total of 40 data values, with what frequen- relative frequency.
cy does the data value 1 occur? Multiplying the rel-
Provide your answer below: ative frequency by
the total number of
data values gives
the frequency.
The data value
1 occurs with
relative frequency
0.15 in a data
set of 40 values,
the frequency of
the data value 1
is0.15(40)=6.
The data value 1
occurs 6 times.
3. Given the relative frequency table below, which of Answer Explana-
the following is the corresponding cumulative relative tion
frequency table? Correct answer:
Value Value:2 3 4 5.
Relative Frequency cuulative relative
2 frequency: 0.23
0.23 0.56 0.8 1
3 Remember that a
, math 225N week 2 Exam Test with Verified Answers Graded A+
0.33 cumulative
4 frequency table
0.24 adds the relative
5 frequencies for
0.2 the previous
Select the correct answer below: entries in the
Value table. For
Cumulative relative frequency example, the
20.2330.5640.851 entry for the value
Value 4
Cumulative relative frequency is0.23+0.33+0.24=0
20.2330.4640.851
Value
Cumulative relative frequency
20.3330.5640.851
Value
Cumulative relative frequency
20.1330.5640.851
4. Question Lower Class
As the manager of a store, you wish to determine LimitUpper Class
the amount of money that people who visit this store LimitFrequen-
are willing to spend on impulse buys on products cy16471241318719
placed near the checkout register. You sample twenty
individuals and records their responses. Construct a
frequency table for grouped data using five classes.
8,18,15,10,29,4,15,2,4,9,16,14,13,8,25,25,27,1,15,24
5. Question To determine the
William wishes to view a frequency table for grouped class width, use
data using his monthly credit card statements for the the formula:
last 20 months, shown below. Construct the table for Max Value Min
William using six classes. ValueNumber of
1184, 1247, 945, 1124, 1034, 1352, 1025, 1439, 1136, Class-
1439, 1368, 1057, 1130, 1259, 1256, 1381, 838, 1342, 842, es=1439 8386H10
1395 Since the data val-
ues are integers,
round up to the
next integer, 101.
