
MATLAB: A Practical Introduction to Programming and Problem Solving
5th Edition
ISBN: 9780128154793
Author: Stormy Attaway Ph.D. Boston University
Publisher: Elsevier Science
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Chapter 14, Problem 14.2P
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Does money buy happiness? This is an age-old question. A random sample of 1993 subjects were asked to rate their happiness
(Not too happy, Pretty happy, or Very happy) and also report their level of income (Above average, average, below average).
The table of the observations is presented below.
Income
Not too happy Pretty happy
Very happy
Total
Above Average
26
233
164
423
Average
117
473
293
883
Below Average
172
383
132
687
Total
315
1089
589
1993
1. Which variable is the response and which is the explanatory variable? [Select]
2. What are the null and alternative hypotheses for testing if there is a relationship between level of income and happiness?
[Select]
and H₁ is [Select]
Ho is
3. What is the chi-square test statistic?
[Select]
4. Which cell contributed the most to the overall chi-square test statistic? [Select]
5. What are the degrees of freedom? [Select]
6. What is the decision about Ho? [Select]
Question 9
<
0/2 pts 299 Details
cor
The numbers of false fire alarms were counted each month at a number of sites. The results are given in
the following table.
Month
January
Number of False Alarms
31
February
37
March
39
April
41
May
44
June
29
July
45
August
40
September
44
October
27
35
29
November
December
Click Download CSV to download csv file of data or copy/paste the data into Excel. After downloading the
file, you may want to save it as an Excel Workbook.
Test the hypothesis that false alarms are equally likely to occur in any month. Use 10% level
of significance.
Procedure: Select an answer
What is the total count (that is, total number of false alarms counted):
If false alarms are equally likely to occur in any month of 12 months, then what is the expected number
of false alarms to occur in any month from the total false alarms of the year (Rounded to 3 or more decimal
places):
Assumptions: (select everything that applies)
Random sample
Normal populations
Observed count for…
or
Search
Do the needs of patients in the emergency room differ for those who come by car vs. those by ambulance?
Of the randomly selected emergency room patients who came by car 62 had an injury, 48 were sick, 49 had
heart problems and 53 had other needs.
Of the randomly selected emergency room patients who came by ambulance 48 had an injury, 29 were sick,
52 had heart problems and 28 had other needs.
Conduct the appropriate hypothesis test using an a = 0.10 level of significance.
a. What is the correct statistical test to use?
O Goodness-of-Fit
O Homogeneity
O Independence
O Paired t-test
b. What are the null and alternative hypotheses?
Ho:
O Means of transportation to the emergency room and emergency room needs are independent.
O Means of transportation to the emergency room and emergency room needs are dependent.
O The distribution of emergency room needs for patients who come by car is not the same as it is
for patients who come by ambulance.
O The distribution of emergency room…
Chapter 14 Solutions
MATLAB: A Practical Introduction to Programming and Problem Solving
Chapter 14, Problem 14.1PChapter 14, Problem 14.2PChapter 14, Problem 14.3PChapter 14, Problem 14.4PChapter 14, Problem 14.5PChapter 14, Problem 14.6PChapter 14, Problem 14.7PChapter 14, Problem 14.8PChapter 14, Problem 14.9PChapter 14, Problem 1E
Chapter 14, Problem 2EChapter 14, Problem 3EChapter 14, Problem 4EChapter 14, Problem 6EChapter 14, Problem 7EChapter 14, Problem 8EChapter 14, Problem 9EChapter 14, Problem 10EChapter 14, Problem 11EChapter 14, Problem 12EChapter 14, Problem 14EChapter 14, Problem 15EChapter 14, Problem 16EChapter 14, Problem 17EChapter 14, Problem 18EChapter 14, Problem 19EChapter 14, Problem 20EChapter 14, Problem 22EChapter 14, Problem 23EChapter 14, Problem 24EChapter 14, Problem 25EChapter 14, Problem 26EChapter 14, Problem 27EChapter 14, Problem 28EChapter 14, Problem 29EChapter 14, Problem 30EChapter 14, Problem 31EChapter 14, Problem 32EChapter 14, Problem 33EChapter 14, Problem 34EChapter 14, Problem 35EChapter 14, Problem 36EChapter 14, Problem 37EChapter 14, Problem 38EChapter 14, Problem 39EChapter 14, Problem 40EChapter 14, Problem 41EChapter 14, Problem 42EChapter 14, Problem 43EChapter 14, Problem 44EChapter 14, Problem 45EChapter 14, Problem 46EChapter 14, Problem 47E
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