Question

A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 380 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 380 individuals and asks them the same questions. Can the psychologist confirm his theory that the attitudes have changed from the first survey to the second survey? Attitude 1st Survey 2nd Survey Optimistic 0.23 0.16 Slightly Optimistic 0.17 0.19 Slightly Pessimistic 0.29 0.34 Pessimistic 0.31 0.31 Find the value of the test statistic. Round your answer to three decimal places. Do we reject or fail to reject null hypothesis?

Answer #1

The statistical software output for this problem is:

Hence,

Test statistic = **6.705**

Assuming significance level as 0.05, we fail to reject null hypothesis.

A psychologist conducted a survey of the attitude towards the
sustainability of American energy consumption with 380380 randomly
selected individuals several years ago. The psychologist believes
that these attitudes have changed over time. To test this he
randomly selects 380380 individuals and asks them the same
questions. Can the psychologist confirm his theory that the
attitudes have changed from the first survey to the second
survey?
Attitude 1st Survey 2nd Survey
Optimistic 0.23 0.16
Slightly Optimistic 0.17 0.19
Slightly Pessimistic ...

A psychologist conducted a survey of the attitude towards the
sustainability of American energy consumption with 380 randomly
selected individuals several years ago. The psychologist believes
that these attitudes have changed over time. To test this he
randomly selects 380 individuals and asks them the same questions.
Can the psychologist confirm his theory that the attitudes have
changed from the first survey to the second survey?
Attitude
1st Survey
2nd Survey
Optimistic
6%
1%
Slightly Optimistic
29%
30%
Slightly Pessimistic...

A psychologist conducted a survey of the attitude towards the
sustainability of American energy consumption with 230 randomly
selected individuals several years ago. The psychologist believes
that these attitudes have changed over time. To test this he
randomly selects 230 individuals and asks them the same questions.
Can the psychologist confirm his theory that the attitudes have
changed from the first survey to the second survey? Attitude 1st
Survey 2nd Survey Optimistic 35%, 38% Slightly Optimistic 12%, 14%
Slightly Pessimistic...

A psychologist
conducted a survey of the attitude towards the sustainability of
American energy consumption with 250 randomly selected individuals
several years ago. The psychologist believes that these attitudes
have changed over time. To test this he randomly selects 250
individuals and asks them the same questions. Can the psychologist
confirm his theory that the attitudes have changed from the first
survey to the second survey?
Attitude
1st Survey
2nd Survey
Optimistic
7%
6%
Slightly
Optimistic
9%
6%
Slightly
Pessimistic...

A psychologist conducted a survey of the attitude towards the
sustainability of American energy consumption with 250 randomly
selected individuals several years ago. The psychologist believes
that these attitudes have changed over time. To test this he
randomly selects 250 individuals and asks them the same questions.
Can the psychologist confirm his theory that the attitudes have
changed from the first survey to the second survey?
Attitude 1st Survey 2nd Survey
Optimistic 7% 5%
Slightly Optimistic 11% 18%
Slightly Pessimistic...

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