Learning Materials
Features
Discover
Chapter 1: Q T1.7. (page 79)
Forty students took a statistics examination having a maximum of points. The score distribution is given in the following stem-and-leaf plot:
The third quartile of the score distribution is equal to
The correct option is (b)
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
C-sections Do male doctors perform more cesarean sections (C-sections) than female doctors? A study in Switzerland examined the number of cesarean sections (surgical deliveries of babies) performed in a . Section Describing Quantitative Data with Numbers year by samples of male and female doctors. Here are summary statistics for the two distributions:
(a) Based on the computer output, which distribution would you guess has a more symmetrical shape? Explain.
(b) Explain how the IQRs of these two distributions can be so similar even though the standard deviations are quite different.
(c) Does it appear that males perform more C-sections? Justify your answer
Which of the following bar graphs is equivalent to the pie chart in Question T1.2?
El Niño and the monsoon It appears that El Niño, the periodic warming of the Pacific Ocean west of South America, affects the monsoon rains that are essential for agriculture in India. Here are the monsoon rains (in millimeters) for the strong El Niño years between and
(a) To make a stem plot of these rainfall amounts, round the data to the nearest 10, so that stems are hundreds of millimeters and leaves are tens of millimeters. Make two stem plots, with and without splitting
the stems. Which plot do you prefer?
(b) Describe the shape, center, and spread of the distribution.
(c) The average monsoon rainfall for all years from to is about millimeters. What effect does El Niño appear to have on monsoon rains?
A survey was designed to study how business operations vary according to their size. Companies were classified as small, medium, or large. Questionnaires were sent to randomly selected businesses of each size. Since not all questionnaires in a survey of this type are returned, researchers decided to investigate the relationship between the response rate and the size of the business. The data are given in the following two-way table.
What percent of all small companies receiving questionnaires responded?
The histogram below shows the distribution of the per cent of
women aged 15 and over who have never married in each
of the 50 states and the District of Columbia.
The leftmost bar in the histogram covers per cent of never-married women ranging from about
(a) to
(b)to
(c)
(d) to
(e) None of these.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App