To determine if the car ownership affects a student's academic achievement, two random samples of 100...
To determine if the car ownership affects a student's academic achievement, two random samples of 100 male students were drawn from the student population. The mean grade point of average of non-car owners was 2.70 with a variance of 0.36, and for a car owners this was 2.54 and 0.40. Does the data present a significant difference between the two? Use Hypothesis testing.
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question level of significance Alfa value was not know so the
appropriate conclusion can not be made. If you have know
significance level then write your answer accordingly.
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To determine if the car ownership affects a student's academic
achievement, two random samples of 100...
The following observations are from two independent random samples, drawn from normally distribut...
The following observations are from two independent random samples, drawn from normally distributed populations. Sample 1 9.74, 9.04, 8.06, 6.09, 7.51 Sample 2 |[25.96, 26,27, 26,34, 39.09, 33.88, 28.87, 33.46] We are interested in testing the null hypothesis that the two population variances are equal, against the one-sided alternative that the variance of Population 1 is larger than the variance of Population 2. Define Population 1 to be the population with the larger sample variance a) What are the appropriate...
a) b) Salary information regarding two independent random samples of male and female employees of a...
a)
b)
Salary information regarding two independent random samples of male and female employees of a large company is shown below. Male Female 64 36 Sample size Sample mean salary (in $1000s) Population variance 44 41 128 72 If you are interested in testing whether the average salary of males is significantly greater than that of females, what is the null hypothesis? O Ho: male < female Ho male > female Ho: male > female None of the answers is...
Problem 10.12. A course can be taken for credit either by attending lectures at fixed times...
Problem 10.12. A course can be taken for credit either by attending lectures at fixed times and days, or by taking online sessions that can be done a the student's own pace and at those times/days that the student chooses. The course coordinator wants to determine if these two ways of taking the course resulted in a significant difference in achievement as measured by the final exam for the course. The table below gives the scores on an examination with...
Independent random samples of students were taken from two high schools, R and S, and the...
Independent random samples of students were taken from two high schools, R and S, and the proportion of students who drive to school in each sample was recorded. The difference between the two sample proportions (R minus S) was 0.07. Under the assumption that all conditions for inference were met, a hypothesis test was conducted where the alternative hypothesis was the population proportion of students who drive to school for R was greater than that for S. The p-value of...
1. Independent random samples of students were taken from two high schools, R and S, and...
1. Independent random samples of students were taken from two high schools, R and S, and the proportion of students who drive to school in each sample was recorded. The difference between the two sample proportions (R minus S) was 0.07. Under the assumption that all conditions for inference were met, a hypothesis test was conducted where the alternative hypothesis was the population proportion of students who drive to school for R was greater than that for S. The p-value...
Two random samples of student loans were collected: one from students at for-profit schools and another...
Two random samples of student loans were collected: one from students at for-profit schools and another from students at non-profit schools. The accompanying data show the sample sizes and the number of loans in each sample that defaulted. Complete parts a through c. Click the icon to view the loan data. a. Perform a hypothesis test using a = 0.10 to determine if the proportion of for-profit loans that default is larger than the proportion of loans for nonprofit schools...
QUESTION 1 Salary information regarding two independent random samples of male and female employees of a...
QUESTION 1 Salary information regarding two independent random samples of male and female employees of a large company is shown below. Male Female 36 41 72 Sample size 64 Sample mean salary (in44 S1000s) Population variance 128 The point estimate of the difference between the means of the two populations (Male - Female) is -28 4 -4 Refer to Question 1. The standard error for the difference between the two means is_ 4 7.46 4.24 2.0 Refer to Question 1...
Perform the five step hypothesis testing. Y? IV. (5 points) A course can be taken for...
Perform the five step hypothesis testing.
Y? IV. (5 points) A course can be taken for credit either by attending lecture sessions at fixed times and days, or by doing online sessions that can be done at the student's own pace and at those times the student chooses. The course coordinator wants to determine if these two ways of taking the course resulted in a significant difference in achievement as measured by the final exam for the course. The below...
1. You have a dataset from a random sample of U.S. adults and are analyzing two...
1. You have a dataset from a random sample of U.S. adults and are analyzing two variables measured as follows:Sex (0=male; 1=female) and Felony criminal record (0=no; 1=yes). Which statistic is most appropriate for describing the strength of the relationship between these two variables? Chi-square Phi-coefficient Goodman and Kruskal's gamma Yule's Q None of the above 2. A hypothesis test for the difference between two independent sample means assumes ____________. we have two samples that are independently selected we have...
Two random samples of student loans were collected: one from students at for-profit schools and another...
Two random samples of student loans were collected: one from students at for-profit schools and another from students at non-profit schools. The accompanying data show the sample sizes and the number of loans in each sample that defaulted. Complete parts a through c. Click the icon to view the loan data. a. Perform a hypothesis test using a = 0.10 to determine if the proportion of for-profit loans that default is larger than the proportion of loans for nonprofit schools...
The following observations are from two independent random samples, drawn from normally distributed populations. Sample 1 9.74, 9.04, 8.06, 6.09, 7.51 Sample 2 |[25.96, 26,27, 26,34, 39.09, 33.88, 28.87, 33.46] We are interested in testing the null hypothesis that the two population variances are equal, against the one-sided alternative that the variance of Population 1 is larger than the variance of Population 2. Define Population 1 to be the population with the larger sample variance a) What are the appropriate...
a)
b)
Salary information regarding two independent random samples of male and female employees of a large company is shown below. Male Female 64 36 Sample size Sample mean salary (in $1000s) Population variance 44 41 128 72 If you are interested in testing whether the average salary of males is significantly greater than that of females, what is the null hypothesis? O Ho: male < female Ho male > female Ho: male > female None of the answers is...
Problem 10.12. A course can be taken for credit either by attending lectures at fixed times and days, or by taking online sessions that can be done a the student's own pace and at those times/days that the student chooses. The course coordinator wants to determine if these two ways of taking the course resulted in a significant difference in achievement as measured by the final exam for the course. The table below gives the scores on an examination with...
Two random samples of student loans were collected: one from students at for-profit schools and another from students at non-profit schools. The accompanying data show the sample sizes and the number of loans in each sample that defaulted. Complete parts a through c. Click the icon to view the loan data. a. Perform a hypothesis test using a = 0.10 to determine if the proportion of for-profit loans that default is larger than the proportion of loans for nonprofit schools...
QUESTION 1 Salary information regarding two independent random samples of male and female employees of a large company is shown below. Male Female 36 41 72 Sample size 64 Sample mean salary (in44 S1000s) Population variance 128 The point estimate of the difference between the means of the two populations (Male - Female) is -28 4 -4 Refer to Question 1. The standard error for the difference between the two means is_ 4 7.46 4.24 2.0 Refer to Question 1...
Perform the five step hypothesis testing.
Y? IV. (5 points) A course can be taken for credit either by attending lecture sessions at fixed times and days, or by doing online sessions that can be done at the student's own pace and at those times the student chooses. The course coordinator wants to determine if these two ways of taking the course resulted in a significant difference in achievement as measured by the final exam for the course. The below...
Two random samples of student loans were collected: one from students at for-profit schools and another from students at non-profit schools. The accompanying data show the sample sizes and the number of loans in each sample that defaulted. Complete parts a through c. Click the icon to view the loan data. a. Perform a hypothesis test using a = 0.10 to determine if the proportion of for-profit loans that default is larger than the proportion of loans for nonprofit schools...
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