# Data Set 7

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User Generated
Subject
Statistics
School
Abbott Academy of Cosmetology Arts and Sciences
Type
Homework
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Statistics Questions
Student Name
University Affiliation
Date of Submission

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Data Set 7-2
There were 184 seniors, 179 juniors, 267 sophomores, and 353 freshmen enrolled at a
small college.
1.In Data Set 7-2, what is the probability of picking a student at random and getting a
freshman?
184+179+267+353 = 982
353/982 = 0.36
To get the probability of selecting a freshman, get the total number of students, then get the
proportion of the freshmen in the school, that is the chance to select a freshman.
2.In Data Set 7-2, what is the probability of picking a student at random and getting either
a junior or a senior?
In this instance the probability of picking a junior is added to the probability of picking a
senior. This is because it is either or, not both at the same time.
182/982 + 179/982 = 361/982 = 0.37
3.What is the nature of the Data Set 7-2.(Describe)
The dataset has data that is categorized into 4 categories. The data is then recorded according
to the frequency of occurrence in the 4 categories. The categories are ordered according to the
years in school.
Data Set 7-3
A population of scores was normally distributed with a mean of 32 and a standard
deviation of 3.
4.Look at Data Set 7-3. What is the proportion that scored between 30 and 27?
Find z scores and them use tables to find probabilities.

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1 Statistics Questions Student Name University Affiliation Date of Submission 2 Data Set 7-2 There were 184 seniors, 179 juniors, 267 sophomores, and 353 freshmen enrolled at a small college. 1.In Data Set 7-2, what is the probability of picking a student at random and getting a freshman? 184+179+267+353 = 982 353/982 = 0.36 To get the probability of selecting a freshman, get the total number of students, then get the proportion of the freshmen in the school, that is the chance to select a freshman. 2.In Data Set 7-2, what is the probability of picking a student at random and getting either a junior or a senior? In this instance the probability of picking a junior is added to the probability of picking a senior. This is because it is either or, not both at the same time. 182/982 + 179/982 = 361/982 = 0.37 3.What is the nature of the Data Set 7-2.(Describe) The dataset has data that is categorized into 4 categories. The data is then recorded according to the frequency of occurrence in the 4 categories. The categories are ordered according to the years in school. Data Set 7-3 A population of scores was normally distributed with a mean of 32 and a standard deviation of 3. 4.Look ...
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