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 | 6% | 13% |
Slightly Optimistic | 12% | 17% |
Slightly Pessimistic | 22% | 12% |
Pessimistic | 60% | 58% |
Step 6 of 10 :
Find the value of the test statistic. Round your answer to three decimal places.
Step 7 of 10:
find the degrees of freedom associated with the test statistic.
Step 8 of 10 :
Find the critical value of the test at the 0.005 level of significance. Round your answer to three decimal places.
step 9 of 10:
make the decision to reject or fail to reject the null hypothesis at 0.005 level of significance.
step 10 of 10:
state the conclusion of the hypothesis test at the 0.005 level of significance
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with...
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 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 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 8% 3% Slightly Optimistic 26% 30% Slightly Pessimistic...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 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% 11% Slightly Optimistic 28% 24% Slightly Pessimistic...
A psychologist conducted a survey of the attitude towards the sustainability of American energy consumption with 370 randomly selected individuals several years ago. The psychologist believes that these attitudes have changed over time. To test this he randomly selects 370 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% 11% Slightly Optimistic 28% 24% Slightly Pessimistic...
A researcher wants to study the relationship between salary and gender. She randomly selects 368 individuals and determines their salary and gender. Can the researcher conclude that salary and gender are dependent? Income Male Female Total Below $25,000 57 60 117 $25,000-$50,000 48 44 92 $50,000-$75,000 48 45 93 Above $75,000 3131 35 66 Total 184 184 368 Copy Data Step 1 of 8: State the null and alternative hypothesis. Step 2 of 8: Find the expected value for the...
A poll printed the results of a survey of 880 Americans focusing on their perception of the quality of Japanese products. It has been observed that the sentiment towards Japanese products has actually improved over time. Is there sufficient evidence to conclude that American sentiment towards Japanese products changed from 1999 to 2005? 1999 2005 Good to Excellent | 24 % | 25 % 26 % | 28 % Below Average | 21 % | 18% No Opinion | 29...
statistic stuff A university had conducted a survey to recognize the student attitude towards a proposed change in dormitory regulations: allow undergraduates of opposite sexes to share a room. In a random sample of 350 undergraduate students, 186 were males and 164 were females. The results showed that 129 of the male students and 94 of the female students supported the change. (a) Construct a contingency table for the data from this survey. (b) The university wants to know if...
A Gallup poll to survey the top concerns of Americans was conducted. Suppose that 743 women and 713 men were independently and randomly selected, and that 383 women and 282282 men chose the state of the economy as their biggest concern. Can we conclude that the proportion of women ( p1 ), choosing the state of the economy as their biggest concern, exceeds the proportion of men ( p2 )? Use a significance level of α=0.1 for the test. Step 1...
A Gallup poll to survey the top concerns of Americans was conducted. Suppose that 387 women and 359 men were independently and randomly selected, and that 241 women and 202 men chose the state of the economy as their biggest concern. Can we conclude that the proportion of women (p1), choosing the state of the economy as their biggest concern, exceeds the proportion of men (p2)? Use a significance level of α=0.01 for the test. Step 1 of 6: State the...
critical value is 7.779 I think A survey was conducted two years ago asking college students their top motivations for using a credit card. To determine whether this distribution has changed, you randomly select 425 college students and ask each one what the top motivation is for using a credit card. Can you conclude that there has been a change in the claimed or expected distribution? Use a = 0.10. Complete parts (a) through (d). Response Old Survey % Rewards...