Question

In: Statistics and Probability

A measurement of a variable is said to be reliable when Group of answer choices it...

A measurement of a variable is said to be reliable when

Group of answer choices

it shows up on time to class

measures what it is believed to measure

it produces consistent results

none of the above

Question 6

For the next two questions consider the following research hypothesis: “Younger students will learn to use statistical software more quickly than older students.” What is the dependent variable?

Group of answer choices

age of students

number of computers previously purchased

time required to learn to use statistical software

presence or absence of math phobia

Question 7

What is the independent variable?

Group of answer choices

age of students

number of computers previously purchased

time required to learn statistical software

presence or absence of math phobia

Question 8

In order for a measurement to be valid it must also be reliable.

Group of answer choices

True

False

Question 9

What type of variable can theoretically assume any numerical value?

Group of answer choices

continuous

discrete

dichotomous

binary

Question 10

What do you call a continuous line that represents the frequency of scores within a class interval?

Group of answer choices

frequency polygon

line graph

histogram

tally marks

Question 11

If you wanted to examine the proportion of students in this class who is male compared to the proportion who is female, which of the following would be best suited to use?

Group of answer choices

ogive

line graph

pie chart

frequency polygon

Solutions

Expert Solution

Question 5:

Correct option:

it produces consistent results

Explanation:

Reliability implies consistency.

Question 6:

Correct option:

time required to learn to use statistical software

Explanation

Dependent variable is the variable of interest to the researcher. Here the researcher is interested in time required to learn to use statistical software

Question 7:

Correct option:

age of students

Explanation:
Independent variable is the one the researcher is manipulating in order to find its effect on dependent variable. Here the researcher is manipulating the age of students in order to study its effect on time required to learn to use statistical software.

Question 8:

Correct option:

True

Explanation:

A test can be reliable without being valid. But, a test cannot be valid unless it is reliable.

Question 9:

Correct option:

continuous

Explanation:
A variable is continuous if it can take any value in a given interval.

Question 10:

Correct option:

frequency polygon

Explanation:

Frequency Polygon is obtained by joining the mid points of each interval.

Question 11:

Correct option:

pie chart

Explanation:
Pie chart is a circular graphic which is divided into slices to illustrate numerical proportion.

orchestra answered 2 years ago
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