Introduction to the Practice of Statistics 9th edition by David S. Moore Test bank

 D)50
 
 
29.Quantitative variables are best displayed using _______.
 A)stemplots
 B)pie charts
 C)bar graphs
 D)pie charts or bar graphs
 
 
30.Consider the following data which describe the amount of time in minutes students spend studying for a quiz:
10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.
What numbers make up the leaf of the first stem?
 A)0,1,1,2,2,4,5,8,9
 B)0,1,2,4,5,8,9
 C)0,1,1,2,2,4,5,8,9,0,2,4,9,0,1,4,6,0,2,2,3,5,0
 D)None of the above
 
 
31.Consider the following data which describe the amount of time in minutes students spend studying for a quiz:
10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.
What numbers make up the leaf of the last stem?
 A)0,1,1,2,2,4,5,8,9
 B)0,1,4,6
 C)0, 2,2,3,5, 0
 D)None of the above
 
 
32.Consider the following data which describe the amount of time in minutes students spend studying for a quiz:
10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.
What numbers make up the stem?
 A)1,2,3,4,5,6,7
 B)1,2,3,4,5,7
 C)0,1,1,2,2,4,5,8,9,0,2,4,9,0,1,4,6,0,2,2,3,5,0
 D)None of the above
 
 
33.Consider the following data which describe the amount of time in minutes students spend studying for a quiz:
10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.
What numbers make up the leaf of the first stem if you were splitting the stems?
 A)0,1,1,2,2,4,5,8,9
 B)0,1,2,4,5,8,9
 C)0,1,1,2,2,4
 D)0, 1, 2, 4
 
 
34.Consider the following data which describe the amount of time in minutes students spend studying for a quiz:
10, 11, 11, 12, 12, 14, 15, 18, 19, 20, 22, 24, 39, 40, 41, 44, 46, 50, 52, 52, 53, 55, 70.
What numbers make up the leaf of the last stem if you were splitting the stems?
 A)0, 2, 2, 3, 5, 0
 B)0, 2, 3, 5
 C)0
 D)No leaves on the last stem
 
 
35.When making a stemplot, it is appropriate to _______ if the values have many digits.
 A)split the stems
 B)split the leaves
 C)trim the stems
 D)trim the leaves
 
 
36.When making a stemplot, it is appropriate to _______ if the values cover a very small range.
 A)split the stem
 B)split the leaves
 C)trim the stem
 D)trim the leaves
 
 
37.What method is useful when comparing two distributions using a stemplot?
 A)Splitting the stem
 B)Trimming the leaves
 C)Back-to-back stemplots
 D)None of the above
 
 
38.Thirty students were asked, “How much time did you spend studying for the last quiz?” The histograms below were all used on the same data; however, the class size was changed for each one. Which histogram below best displays the data?
 A) 

 B) 

 C) 

 D) 

 
 
39.The stemplot below displays data from 30 students who were asked, “How much time in minutes do you spend on the Internet?” What do you notice about the stemplot?
Variable: Time spent on the Internet
 
The decimal point is 2 digits to the right of the colon.
 
0 : 111123334
0 : 59
1 : 022
1 :
2 : 013333
2 : 5
3 : 224
3 :
4 :
4 :
5 : 4
5 : 678
6 :
6 : 5
7 :
7 :
8 :
8 : 7
 A)The stems were split.
 B)The leaves were trimmed.
 C)The stems were split and the leaves were trimmed.
 D)None of the above
 
 
40.Large data sets with quantitative variables are best displayed using ________.
 A)stemplots
 B)histograms
 C)stemplots and histograms
 D)none of the above
 
 
41.When making histograms, the classes ________.
 A)should be equal width
 B)do not need to be equal width
 C)should be selected randomly
 D)should always be a width of 10
 
 
42.The histogram below shows data from 30 students who were asked, “How much time do you spend on the Internet in minutes?” How could you improve the histogram to better display the distribution?

 A)Increase the class size.
 B)Decrease the class size.
 C)Do nothing—the histogram is appropriate.
 D)Add two more data points.