What r-codes, would I need to answer questions 1? The University of Rochester Alumni and Advancement Center (AAC) is looking to analyze trends amongdonors. In particular, they have a sample of 94 donors who gave a gift in response to a recent solicitation.Suppose you have been hired by the AAC to analyze trends among the donors. The data are stored in thefile donors.csv.For each question:• Provide appropriate summaries (both graphic and numeric) to begin exploring the data.• Assess all assumptions needed for performing the corresponding test to answer the question of interest.• Determine the most appropriate test and perform it.- Make sure to state your hypotheses, the test statistic, and p-value.Interpret the results and summarize your findings.The more robust your responses are, the better. Think of this as you having been hired and you are in chargeof running all applicable analyses and putting together a nice report of what you have found.Use a significance level of a = 0.05 for this entire project.1. Examine the affiliation of the donor (affiliation, either undergraduate alumni, graduate alumni,parent, or friend). Each donor falls into only one category. Based on past solicitations, it is believedthat donations are equally likely from each of the affiliations. Does this appear to still be true?2. Examine the age of donors (age, in years) by type of donation (type, either academic or medical). Doesthe average age of donors differ based on the type of donation? In addition to answering this question,calculate the power of the parametric test to detect a difference of 4 years in age.3. Examine time since last donation (time, in days) by affiliation (affiliation). Does the average timesince last donation differ based on affiliation? AAC staff would like to know whether alumni wait lesstime between donations than non-alumni (i.e. parents and friends), whether undergraduates wait lesstime between donations than graduate alumni, and whether friends wait less time between donationsthan parents.4. Examine type of donation by sex. In particular, is the type of donation related to the sex of the donor?5. Consider only donations made by graduate alumni (i.e. affiliation=="Graduate Alumni"). For thesedonors, is the type of donation related to their sex?6. How can donation amount (amount, in US dollars) be best predicted? To examine this question, makesummary plots and display basic numerical summaries. Use a model selection method (with appropriatejustification as to why you choose it) to determine the predictors you feel best predict donation amount.Then, fit the resulting model, assess the model assumptions, discuss the significance of the model andpredictors, and generally discuss how well you believe the model works in describing donation amount. donorsincome time affiliationsextypeage amount204800248 Undergraduate Alumni female Medical39 445.9356000141 Undergraduate Alumni other Academic 50114.566560069 Undergraduate Alumni other Medical48181.3370400288 Undergraduate Alumni maleMedical34143.8790800308 FriendmaleAcademic49120.47108800192 Graduate AlumnimaleAcademic 51157.91132800166 Undergraduate Alumni maleMedical42160.66123200229 Parentfemale Medical43205.976400173 Parentother Academic47108.3278800360 Graduate Alumnifemale Academic56122.551200316 Undergraduate Alumni female Academic49-7.277600194 ParentmaleMedical3465.67

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The University of Rochester Alumni and Advancement Center (AAC) is looking to analyze trends among donors. In particular, they have a sample of 94 donors who gave a gift in response to a recent solicitation. Suppose you have been hired by the AAC to analyze trends among the donors. The data are stored in the file donors.csv. For each question:

The University of Rochester Alumni and Advancement Center (AAC) is looking to analyze trends among donors. In particular, they have a sample of 94 donors who gave a gift in response to a recent solicitation. Suppose you have been hired by the AAC to analyze trends among the donors. The data are stored in the file donors.csv. For each question:

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Concept explainers

Permutations and Combinations

If there are 5 dishes, they can be relished in any order at a time. In permutation, it should be in a particular order. In combination, the order does not matter. Take 3 letters a, b, and c. The possible ways of pairing any two letters are ab, bc, ac, ba, cb and ca. It is in a particular order. So, this can be called the permutation of a, b, and c. But if the order does not matter then ab is the same as ba. Similarly, bc is the same as cb and ac is the same as ca. Here the list has ab, bc, and ac alone. This can be called the combination of a, b, and c.

Counting Theory

The fundamental counting principle is a rule that is used to count the total number of possible outcomes in a given situation.

Topic Video

Question

What r-codes, would I need to answer questions 1?

The University of Rochester Alumni and Advancement Center (AAC) is looking to analyze trends among
donors. In particular, they have a sample of 94 donors who gave a gift in response to a recent solicitation.
Suppose you have been hired by the AAC to analyze trends among the donors. The data are stored in the
file donors.csv.
For each question:
• Provide appropriate summaries (both graphic and numeric) to begin exploring the data.
• Assess all assumptions needed for performing the corresponding test to answer the question of interest.
• Determine the most appropriate test and perform it.
- Make sure to state your hypotheses, the test statistic, and p-value.
Interpret the results and summarize your findings.
The more robust your responses are, the better. Think of this as you having been hired and you are in charge
of running all applicable analyses and putting together a nice report of what you have found.
Use a significance level of a = 0.05 for this entire project.
1. Examine the affiliation of the donor (affiliation, either undergraduate alumni, graduate alumni,
parent, or friend). Each donor falls into only one category. Based on past solicitations, it is believed
that donations are equally likely from each of the affiliations. Does this appear to still be true?
2. Examine the age of donors (age, in years) by type of donation (type, either academic or medical). Does
the average age of donors differ based on the type of donation? In addition to answering this question,
calculate the power of the parametric test to detect a difference of 4 years in age.
3. Examine time since last donation (time, in days) by affiliation (affiliation). Does the average time
since last donation differ based on affiliation? AAC staff would like to know whether alumni wait less
time between donations than non-alumni (i.e. parents and friends), whether undergraduates wait less
time between donations than graduate alumni, and whether friends wait less time between donations
than parents.
4. Examine type of donation by sex. In particular, is the type of donation related to the sex of the donor?
5. Consider only donations made by graduate alumni (i.e. affiliation=="Graduate Alumni"). For these
donors, is the type of donation related to their sex?
6. How can donation amount (amount, in US dollars) be best predicted? To examine this question, make
summary plots and display basic numerical summaries. Use a model selection method (with appropriate
justification as to why you choose it) to determine the predictors you feel best predict donation amount.
Then, fit the resulting model, assess the model assumptions, discuss the significance of the model and
predictors, and generally discuss how well you believe the model works in describing donation amount.

donors
income time affiliation
sex
type
age amount
204800
248 Undergraduate Alumni female Medical
39 445.93
56000
141 Undergraduate Alumni other Academic 50
114.56
65600
69 Undergraduate Alumni other Medical
48
181.33
70400
288 Undergraduate Alumni male
Medical
34
143.87
90800
308 Friend
male
Academic
49
120.47
108800
192 Graduate Alumni
male
Academic 51
157.91
132800
166 Undergraduate Alumni male
Medical
42
160.66
123200
229 Parent
female Medical
43
205.9
76400
173 Parent
other Academic
47
108.32
78800
360 Graduate Alumni
female Academic
56
122.5
51200
316 Undergraduate Alumni female Academic
49
-7.2
77600
194 Parent
male
Medical
34
65.67

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