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statistical methods

Authored by Kruthi jakkani

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University

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statistical methods
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15 questions

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1.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A ___ is a large group that includes everything being studied.

Sample
Stratified Sampling Method
Population
Voluntary-Response

2.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A ___ is a small portion of the population used to gather data from.

Systematic Sampling Method
Sample
Population
Bias

3.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Why do we randomly select our samples?

to control every aspect
reduce bias
so we don't get the same answers from everyone
because it is easier to do

4.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A teacher wants to know the average time spent doing homework by the students in her class of 20 girls and 5 boys.
She randomly selects 5 students.

Convenience Sampling
Systematic Sample
Stratified Sample
Random Sample

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do we calculate the standard deviation of a dataset?

Square root the dataset's variance

Square root the dataset's deviance from the mean

Square the dataset's variance

Square the dataet's deviance from the mean

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What proportion of the population's data do we expect to lie within 2 standard deviations of the mean?

68%

90%

95%

99.7%

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Find the range of the data 45, 76, 98, 21, 52, 39

108

2

36.5

77

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