Question 1

Consider the following data:  Create a stem and leaf display for the sample.
Stem and leaf of C1,N = 20 Leaf Unit = 0.10

Accepted Answer

The answer of Consider the following data:  Create a...

Question 2

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained:  What percentage of those surveyed were female and could not recall the company?
A)40.0%
B)22.0%
C)52.4%
D)66.7%
E)37.9%

Accepted Answer

The answer of Recently an advertising company called 200 people...

Question 3

Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the distances over 24 miles. 
A).375
B).150
C).125
D).025
E).325

Accepted Answer

The answer of Consider the following data on distances traveled...

Question 4

The following is a partial relative frequency distribution of grades in an introductory statistics course.  Find the relative frequency for B grade
A).78
B).27
C).65
D).37
E).47

Accepted Answer

The answer of The following is a partial relative frequency...

Question 5

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8
Complete this frequency table for these data

Accepted Answer

The answer of The number of items rejected daily by...

Question 6

The following is a relative frequency distribution of grades in an introductory statistics course.  If this was the distribution of 200 students,find the frequency of failures:
A)12
B)6
C)23
D)46
E)3

Accepted Answer

The answer of The following is a relative frequency distribution...

Question 7

The local electronics retailer has recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.The following results were obtained:  What percentage of purchases were Plasma televisions by customers with the smallest credit balances?
A)50.00%
B)39.20%
C)56.30%
D)34.80%
E)19.6%

Accepted Answer

The answer of The local electronics retailer has recently conducted...

Question 8

The following is a relative frequency distribution of grades in an introductory statistics course.  If this was the distribution of 200 students,find the frequency for the highest two grades:
A)44
B)118
C)59
D)74
E)35

Accepted Answer

To find the frequency for the highest two grades, we need to add the frequencies of the last two class intervals. From the distribution, the last two class intervals are 90-99 and 100-109. Adding their frequencies, we get 74 + 44 = 118. Therefore, the best choice is B.

Question 9

Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance. 
A).375
B).150
C).500
D).300
E).333

Accepted Answer

The answer of Consider the following data on distances traveled...

Question 10

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8
Construct a stem-and-leaf plot.

Accepted Answer

The answer of The number of items rejected daily by...

Question 11

The local electronics retailer has recently conducted a study on purchasers of large screen televisions.The study recorded the type of television and the credit account balance of the customer at the time of purchase.The following results were obtained:  What percentage of the customers with the highest credit balances purchased an LCD television?
A)36.30%
B)5.90%
C)19.60%
D)56.30%
E)16.20%

Accepted Answer

Looking at the table, we can see that the highest credit balance range is 1500+. For this range, the total number of customers is 170 and the number of customers who purchased an LCD TV is 10. Thus, the percentage of customers with the highest credit balances who purchased an LCD television is (10/170) x 100 = 5.88%, which rounds up to 5.90%. Therefore, the correct answer is B.

Question 12

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 How many classes should be used in the construction of a histogram?
A)6
B)5
C)7
D)4
E)8

Accepted Answer

To determine the number of classes for a histogram, a common rule is to use between 5 and 20 classes, depending on the range of the data and the desired level of detail. In this case, the range of the data is from 4 to 28, which is 24. Using the Sturges' rule, which suggests the number of classes = 1 + log2(n), where n is the sample size, we get:

1 + log2(30) ≈ 6 classes

However, using too many classes can make the histogram too detailed, while too few classes can oversimplify the data. Therefore, it is recommended to use 5 or 6 classes in this case, as they typically provide a good balance between detail and simplicity. Therefore, the best choice is B) 5 classes.

Question 13

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8
Construct an Ogive plot

Accepted Answer

The answer of The number of items rejected daily by...

Question 14

Consider the following data on distances traveled by people to visit the local amusement park.  Construct an Ogive plot that corresponds to the frequency table.

Accepted Answer

The answer of Consider the following data on distances traveled...

Question 15

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below:
24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50
Construct an Ogive plot

Accepted Answer

The answer of The number of weekly sales calls by...

Question 16

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50
How many classes should be used in the construction of a histogram?
A)4
B)6
C)10
D)5
E)2

Accepted Answer

Classes are determined by the value of k, where 2^k yields a value that is closest to the sample size and is also larger than the sample size. k = 5, so 2⁵ = 32.

Question 17

The following is a relative frequency distribution of grades in an introductory statistics course.  If this was the distribution of 200 students,give the frequency distribution for this data:

Accepted Answer

The answer of The following is a relative frequency distribution...

Question 18

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained:  What percentage of those surveyed could not correctly recall the company?
A)58.00%
B)56.89%
C)55.00%
D)43.10%
E)42.00%

Accepted Answer

The answer of Recently an advertising company called 200 people...

Question 19

Using the following data,what would be the leaf unit in a stem and leaf display? 
A)1.0
B)10
C).10
D).01
E).20

Accepted Answer

The leaf unit is determined by the smallest value of the data set. In this case, the smallest value is 0.10, so the leaf unit would be .10. The other options are not the smallest value in the data set.

Question 20

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50
What is the shape of the distribution of the data?
A)Skewed with tail to the right
B)Skewed with tail to the left
C)Normal
D)Bi-model

Accepted Answer

The data appears to be skewed with a tail to the right, as the majority of the data is concentrated on the left side of the distribution and the tail extends to the right.

Quiz 2: Descriptive Statistics: Tabular and Graphical Methods

Consider the following data: Create a stem and leaf display for the sample. Stem and leaf of C1,N = 20 Leaf Unit = 0.10

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained: What percentage of those surveyed were female and could not recall the company?

Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the distances over 24 miles.

The following is a partial relative frequency distribution of grades in an introductory statistics course. Find the relative frequency for B grade

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 Complete this frequency table for these data

The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students,find the frequency of failures:

The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students,find the frequency for the highest two grades:

Consider the following data on distances traveled by people to visit the local amusement park and calculate the relative frequency for the shortest distance.

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 Construct a stem-and-leaf plot.

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 How many classes should be used in the construction of a histogram?

The number of items rejected daily by a manufacturer because of defects for the last 30 days are: 20,21,8,17,22,19,18,19,14,17,11,6,21,25,4,19,9,12,16,16,10,28,24,6,21,20,25,5,17,8 Construct an Ogive plot

Consider the following data on distances traveled by people to visit the local amusement park. Construct an Ogive plot that corresponds to the frequency table.

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 Construct an Ogive plot

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 How many classes should be used in the construction of a histogram?

The following is a relative frequency distribution of grades in an introductory statistics course. If this was the distribution of 200 students,give the frequency distribution for this data:

Recently an advertising company called 200 people and asked to identify the company that was in an ad running nationwide.The following results were obtained: What percentage of those surveyed could not correctly recall the company?

Using the following data,what would be the leaf unit in a stem and leaf display?

The number of weekly sales calls by a sample of 25 pharmaceutical salespersons is below: 24,56,43,35,37,27,29,44,34,28,33,28,46,31,38,41,48,38,27,29,37,33,31,40,50 What is the shape of the distribution of the data?