1. A furniture store reduces the prices of sofas in an autumn sale. The number of sofas sold during the 19 days of the sale were:
1. A furniture store reduces the prices of sofas in an autumn sale. The number of sofas sold during the 19 days of the sale were:
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
100%
need help with questions number 3
Transcribed Image Text:1.
A furniture store reduces the prices of sofas in an autumn sale.
The number of sofas sold during the 19 days of the sale were:
2.
3.
Work out the median and the lower and upper quartiles for the number of sofas sold in
the sale.
The frequency table shows information about the number of children living in each house
on a street.
41, 44, 48, 55, 40, 44, 45, 42, 55, 55, 36, 36, 51, 47, 41, 38, 43, 48, 53
Number of
children
Frequency
Mean daily
temperature, t(°C)
Frequency
a.
b.
a.
b.
C.
d.
0
19
1
16 23 13
Work out the mean, median and modal values of the number of children in each house
in the street.
2 3
The grouped frequency table shows information from the large data set about the mean
daily temperature in Heathrow between May and October 2015.
43
Time, t (minutes) 0<t≤30
Frequency
14
11
8<t≤12 12<t<14 14<t<16 16<t≤18
33
4
41
52
6
Work out the class interval that contains the median of these data.
Calculate an estimate of the overall mean daily temperature between May and
October. Give your answer to 3 significant figures.
4. The table shows the time (t) in minutes that people left their cars in a supermarket car park.
32
5
1
18<t<20 20<t<29
30<t<60 60<t<90 90<t≤120
27
36
Explain why your answer is an estimate.
What is another name for the 75th percentile?
Why is it not possible to estimate the 90th percentile of this data?
120<t
12
15
Use interpolation to estimate the 75th percentile of the time that cars were left
in the car park.
5. The mean maximum daily temperature for the last week in August was 23°C and the mean
for the first ten days in September was 20°C.
What is the overall mean maximum daily temperature for these seventeen days?
Expert Solution
Step 1
Given:
The frequency distribution is shown below
| Mean daily temperature t | Frequency |
| 8-12 | 19 |
| 12-14 | 43 |
| 14-16 | 41 |
| 16-18 | 33 |
| 18-20 | 36 |
| 20-29 | 12 |
Step by step
Solved in 2 steps
Recommended textbooks for you
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
MATLAB: An Introduction with Applications
Statistics
ISBN:
9781119256830
Author:
Amos Gilat
Publisher:
John Wiley & Sons Inc
Probability and Statistics for Engineering and th…
Statistics
ISBN:
9781305251809
Author:
Jay L. Devore
Publisher:
Cengage Learning
Statistics for The Behavioral Sciences (MindTap C…
Statistics
ISBN:
9781305504912
Author:
Frederick J Gravetter, Larry B. Wallnau
Publisher:
Cengage Learning
Elementary Statistics: Picturing the World (7th E…
Statistics
ISBN:
9780134683416
Author:
Ron Larson, Betsy Farber
Publisher:
PEARSON
The Basic Practice of Statistics
Statistics
ISBN:
9781319042578
Author:
David S. Moore, William I. Notz, Michael A. Fligner
Publisher:
W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:
9781319013387
Author:
David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:
W. H. Freeman