Question

A social scientist measures the number of minutes (per day) that a small hypothetical population of college students spends online.

Student | Score | Student | Score |
---|---|---|---|

A | 53 | F | 72 |

B | 28 | G | 93 |

C | 92 | H | 88 |

D | 92 | I | 88 |

E | 82 | J | 95 |

(a) What is the range of data in this population?

__________ min

(b) What is the IQR of data in this population?

______ min

(c) What is the SIQR of data in this population?

_____ min

(d) What is the population variance?

(e) What is the population standard deviation? (Round your answer
to two decimal places.)

__________ min

Answer #1

A social scientist measures the number of minutes (per day) that
a small hypothetical population of college students spends online.
Student Score Student Score A 26 F 89 B 93 G 81 C 89 H 58 D 92 I 92
E 71 J 96 (a) What is the range of data in this population? min (b)
What is the IQR of data in this population? min (c) What is the
SIQR of data in this population? min (d) What is...

A social scientist measures the number of minutes (per day) that
a small hypothetical population of college students spends online.
Student Score Student Score A 31 F 86 B 95 G 55 C 99 H 86 D 92 I 99
E 83 J 74 (a) What is the range of data in this population?
Correct: Your answer is correct. min (b) What is the IQR of data in
this population? Correct: Your answer is correct. min (c) What is
the...

1. The average number of minutes spent per day using social
media by a population of college sophomores is 29.6 minutes. If we
take a random sample of size n = 87 from this population and find
that the sample standard deviation is 7.3 minutes, we know the
sampling distribution of the sample mean in this case would have a
standard deviation equal to
A. 4.05 minutes.
B. 1.60 minutes.
C. 0.78 minutes.
D. 7.30 minutes.
E. 3.17minutes.
2. Return...

The Test Scores for a Statistics course are given in the Excel
below.
The data (X1, X2, X3, X4) are for each student.
X1 = score on exam #1
X2 = score on exam #2
X3 = score on exam #3
X4 = score on final exam
Your professor wants to know if all tests are created equal.
What is the F-Stat?
EXAM1
EXAM2
EXAM3
FINAL
73
80
75
65.86667
93
88
93
80.16667
89
91
90
78
96
98...

Q1 )Find the 1st quartile, 2nd quartile, third quartile and the
interquartile range of the following data set
72, 74, 75, 77, 79, 82, 83, 87, 88, 90, 91, 91, 91, 92, 96, 97,
97, 98, 100
The 1st Quartile :
The 2nd Quartile :
The 3rd Quartile :
The IQR :
Q2)
According to the empirical rule, if a population has a normal
distribution, approximately what percentage of values is within
one, two and three standard deviation of the...

A statistics student made the following grades on the first 6
tests: 76, 82, 92, 95, 92, 86. The total number of tests for the
semester is 7. If the median score for the whole semester was 92,
what could not have been the score of the last test?
a. 77
b.92
c.93
d. 94
e.96
A commuter travels many miles to work each morning. She has
timed this trip 5 times during the last month. The time (in
minutes)...

1.A hypothetical population consists of eight individuals ages
14, 15, 17, 18, 19, 24, 25, and 30 years. (Enter your answers to
three decimal places.)
(a) What is the probability that a person in this population is
a teenager?
(b) What is the probability of selecting a participant who is at
least 20 years old?
(c) What is the probability of selecting a participant older than
30?
Note that 8 is the sample space for this population.
2) Researchers often...

A social researcher employs a ratio-level measure to study
prejudice toward Arab Americans in the first month after 9/11. The
data below represents a set of responses to a series of questions
about Arab Americans that is scored from 0 to 100 (100 is extreme
prejudice).
Attitudes of 10 College Students toward Arab Americans:
Ratio Data
*higher scores indicate greater prejudice against Arab
Americans
Student
Score
A
98
B
21
C
95
D
22
E
6
F
96
G
11...

The data are not actual data, but are modeled after data
collected by Trautwein and Ammerman (2013) for a study on the
effects of cochlear implants (CI) on the language, speech, and
perception skills of 32 deaf children: 16 subjects with at least
one cochlear implant (CI) and 16 subjects (with hearing loss)
without an implant. (CI subjects were implanted at 13 or 14 months
of age. So, no subjects had CIs at the time of the first data
collection.)...

The Data
A central tenet to being a good instructor, I believe, is to be a
reflective practitioner of your craft. From time to time I find it
to be necessary to review and reflect on my work as an instructor
from a grade perspective. On our moodle page you will find a link
to a second word document titled “300 Grades”. This data sheet
contains both the alphanumeric grade (page 1) and the numerical
equivalent (page 2) for every...

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