
a.
To draw: A two-way-table representing the given data and to find and interpret the marginal frequencies.
a.

Answer to Problem 10CT
211 students are attending the class field trip, 60 are not attending.
Total number of males is 121 and total number of females is 150 .
Explanation of Solution
Given Information: Information regarding a class field trip is given.
Table and Interpretation:
Creating a two-way table based on the given information,
AttendingNot attendingTotalMales92a121Femalesb31eTotalcd271
Calculating a,b,c and d using simple addition and subtraction,
a=121−92
=29
d=a+31
d=a+31 =60
c=271−d
=211
b=c−92 =119
e=b+31
=150
Completing the two-way table using derived values,
AttendingNot attendingTotalMales9229121Females11931150Total21160271
211 students are attending the class field trip, 60 are not attending.
Total number of males is 121 and total number of females is 150 .
b.
To find: The percentage of females attending the class field trip.
b.

Answer to Problem 10CT
Around 79% of females are attending the class field trip.
Explanation of Solution
Given Information: Information regarding a class field trip is given.
Calculation:
Total number of females =150
Number of females attending the class field trip =119
Percentage of female (attending) =119150≃0.79 or 79%
Thus, around 79% of females are attending the class field trip.
Chapter 11 Solutions
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