Decide whether the experiment is a binomial experiment. If it is not, explain why. You test four flu medicines. The random variable represents the flue medicine that is most effective.
What will be an ideal response?
Q. 2the day of the month
A) interval B) ratio C) ordinal D) nominal
Q. 3A percentage distribution is given below for the size of families in one U.S. city.
Size Percentage
2 47.7
3 22.1
4 18.8
5 7.0
6 2.5
7+ 1.9
A family is selected at random. Find the probability that the size of the family is at most 3. Round approximations to three decimal places.
A) 0.302 B) 0.221 C) 0.477 D) 0.698
Q. 4the native language of a tourist
A) ratio B) interval C) nominal D) ordinal
Q. 5A relative frequency distribution is given below for the size of families in one U.S. city.
Size Relative frequency
2 0.399
3 0.247
4 0.209
5 0.096
6 0.031
7+ 0.018
A family is selected at random. Find the probability that the size of the family is between 2 and 5 inclusive. Round approximations to three decimal places.
A) 0.951 B) 0.456 C) 0.855 D) 0.495
Q. 6Decide whether the experiment is a binomial experiment. If it is not, explain why. Each week, a man attends a club meeting in which he has a 34 chance of meeting a new member.
The random variable is the number of times he meets a new member in 44 weeks.
Q. 7An education researcher was interested in examining the effect of the teaching method and the effect of the particular teacher on students' scores on a reading test.
In a study, there are four different teachers (Juliana, Felix, Sonia, and Helen) and three different teaching methods (method A, method B, and method C). The number of students participating in the study is 258. Students are randomly assigned to a teaching method and teacher. Identify the experimental units (subjects).
A) The 258 students participating in the study
B) Teaching method and teacher
C) The three groups of students (those assigned to method A, those assigned to method B, and those assigned to method C)
D) Method A, method B, method C
Q. 8Suppose x is a variable on each of two populations whose members can be paired and that a paired difference is the difference between the values of the variable x on the members of a pair.
True or false? The mean of the paired differences equals the difference between the two population means.
A) True B) False
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