STAT3331 MindTap Practice Problems Ch 2
Questions and Comprehensive Answers Graded
A 2024-2025
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(a)What is your age? - ✔️✔️*Quantitative
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(b)Are you male or female? - ✔️✔️*Categorical
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(c)When did you first start reading the WSJ? High school, college, early career,
midcareer, late career, or retirement? - ✔️✔️*Categorical
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(d)How long have you been in your present job or position? - ✔️✔️*Quantitative
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(e)What type of vehicle are you considering for your next purchase? Nine response
categories include sedan, sports car, SUV, minivan, and so on. - ✔️✔️*Categorical
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
,(a)What percentage of GMAT scores are 647 or higher? - ✔️✔️*16%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(b)What percentage of GMAT scores are 747 or higher? - ✔️✔️*2.4%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(c)What percentage of GMAT scores are between 447 and 547? - ✔️✔️*34%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(d)What percentage of GMAT scores are between 347 and 647? - ✔️✔️*81.5%
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
(a)Considering only offices without a wait-tracking system, what is the z-score for the
10th patient in the sample (wait time = 37 minutes)?If required, round your answers to
two decimal places. - ✔️✔️*0.48
, Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
(b)Considering only offices with a wait-tracking system, what is the z-score for the 6th
patient in the sample (wait time = 37 minutes)?If required, round your answers to two
decimal places. - ✔️✔️*2.13
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
How does this z-score compare with the z-score you calculated for part (a)?
Both patients had wait times that ___ the means of their respective samples, as
indicated by the ___ z-scores. - ✔️✔️*exceeded
*positive
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Questions and Comprehensive Answers Graded
A 2024-2025
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(a)What is your age? - ✔️✔️*Quantitative
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(b)Are you male or female? - ✔️✔️*Categorical
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(c)When did you first start reading the WSJ? High school, college, early career,
midcareer, late career, or retirement? - ✔️✔️*Categorical
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(d)How long have you been in your present job or position? - ✔️✔️*Quantitative
A Wall Street Journal subscriber survey asked 46 questions about subscriber
characteristics and interests. State whether each of the following questions provides
categorical or quantitative data.
(e)What type of vehicle are you considering for your next purchase? Nine response
categories include sedan, sports car, SUV, minivan, and so on. - ✔️✔️*Categorical
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
,(a)What percentage of GMAT scores are 647 or higher? - ✔️✔️*16%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(b)What percentage of GMAT scores are 747 or higher? - ✔️✔️*2.4%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(c)What percentage of GMAT scores are between 447 and 547? - ✔️✔️*34%
The Graduate Management Admission Test (GMAT) is a standardized exam used by
many universities as part of the assessment for admission to graduate study in
business. The average GMAT score is 547 (Magoosh web site). Assume that GMAT
scores are bell-shaped with a standard deviation of 100.
If required, round your answers to one decimal place.
(d)What percentage of GMAT scores are between 347 and 647? - ✔️✔️*81.5%
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
(a)Considering only offices without a wait-tracking system, what is the z-score for the
10th patient in the sample (wait time = 37 minutes)?If required, round your answers to
two decimal places. - ✔️✔️*0.48
, Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
(b)Considering only offices with a wait-tracking system, what is the z-score for the 6th
patient in the sample (wait time = 37 minutes)?If required, round your answers to two
decimal places. - ✔️✔️*2.13
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
Click on the datafile logo to reference the data.
Without Wait-Tracking System
24,67,17,20,31,44,12,23,16,37
With Wait-Tracking System
31,11,14,18,12,37,9,13,12,15
How does this z-score compare with the z-score you calculated for part (a)?
Both patients had wait times that ___ the means of their respective samples, as
indicated by the ___ z-scores. - ✔️✔️*exceeded
*positive
Suppose that the average waiting time for a patient at a physician's office is just over 29
minutes. In order to address the issue of long patient wait times, some physicians'
offices are using wait-tracking systems to notify patients of expected wait times.
Patients can adjust their arrival times based on this information and spend less time in
waiting rooms. The following data show wait times (minutes) for a sample of patients at
offices that do not have a wait-tracking system and wait times for a sample of patients at
offices with a wait-tracking system.
