Pagina de inicio
/
Medicina
/
Assignment: Significant Test and Hypotheses 7. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' attitudes toward school and study habits. Scores range from 0 to 200. The mean score for U.S. college students is about 115. A teacher suspects that older students have better attitudes toward school. She gives the SSHA to an SRS of 45 of the more than 1000 students at her college who are at least 30 years of age. a. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. b. The sample mean SSHA score was 1257 and the sample standard deviation was 298. A significance test yields a P-value of 0.0101. Interpret the P-value in context. c. What conclusion would you make? 8. A Gallup Poll report revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this result holds true in her large high school. She surveys a random sample of 150 students at her school. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. 9. Simon reads a newspaper report claiming that 12% of all adults in the United States are left-handed. He wonders if this figure holds true at the large community college he attends. Simon chooses an SRS of 100 students and records whether each student is right- or left-handed State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest.

Problemas

Assignment: Significant Test and Hypotheses 7. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' attitudes toward school and study habits. Scores range from 0 to 200. The mean score for U.S. college students is about 115. A teacher suspects that older students have better attitudes toward school. She gives the SSHA to an SRS of 45 of the more than 1000 students at her college who are at least 30 years of age. a. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. b. The sample mean SSHA score was 1257 and the sample standard deviation was 298. A significance test yields a P-value of 0.0101. Interpret the P-value in context. c. What conclusion would you make? 8. A Gallup Poll report revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this result holds true in her large high school. She surveys a random sample of 150 students at her school. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. 9. Simon reads a newspaper report claiming that 12% of all adults in the United States are left-handed. He wonders if this figure holds true at the large community college he attends. Simon chooses an SRS of 100 students and records whether each student is right- or left-handed State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest.

Assignment: Significant Test and Hypotheses 7. The Survey of Study Habits and Attitudes (SSHA) is a psychological test that measures students' attitudes toward school and study habits. Scores range from 0 to 200. The mean score for U.S. college students is about 115. A teacher suspects that older students have better attitudes toward school. She gives the SSHA to an SRS of 45 of the more than 1000 students at her college who are at least 30 years of age. a. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. b. The sample mean SSHA score was 1257 and the sample standard deviation was 298. A significance test yields a P-value of 0.0101. Interpret the P-value in context. c. What conclusion would you make? 8. A Gallup Poll report revealed that 72% of teens said they seldom or never argue with their friends. Yvonne wonders whether this result holds true in her large high school. She surveys a random sample of 150 students at her school. State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest. 9. Simon reads a newspaper report claiming that 12% of all adults in the United States are left-handed. He wonders if this figure holds true at the large community college he attends. Simon chooses an SRS of 100 students and records whether each student is right- or left-handed State appropriate hypotheses for performing a significance test. Be sure to define the parameter of interest.

Solución

avatar
Doloresexperto · Tutor durante 3 años
expert verifiedVerificación de expertos
3.5 (219 votos)

Responder

a. For the SSHA test:<br />H0: The mean SSHA score for students at least 30 years of age is 115.<br />H1: The mean SSHA score for students at least 30 years of age is not 115.<br /><br />b.-value of 0.0101 indicates that there is a 1.01% chance of obtaining a sample mean SSHA score of 1257 or more extreme, given that the null hypothesis is true. This is a very low probability, suggesting that the observed sample mean is unlikely to have occurred by chance alone.<br /><br />c. Since the P-value is less than the commonly used significance level of 0.05, we reject the null hypothesis. This suggests that there is sufficient evidence to support the teacher's claim that older students have better attitudes toward school.<br /><br />8. For the Gallup Poll result:<br />H0: The proportion of teens who seldom or never argue with their friends at Yvonne's high school is 72%.<br />H1: The proportion of teens who seldom or never argue with their friends at Yvonne's high school is not 72%.<br /><br />9. For the left-handedness claim:<br />H0: The proportion of left-handed adults at Simon's community college is 12%.<br />H1: The proportion of left-handed adults at Simon's community college is not 12%.
Haz clic para calificar: