a)
b)
this is paired t-test
t-Test: Paired Two Sample for Means | ||
Variable 1 | Variable 2 | |
Mean | 6.4 | 3.6 |
Variance | 1.8 | 2.8 |
Observations | 5 | 5 |
Pearson Correlation | 0.423163633 | |
Hypothesized Mean Difference | 0 | |
df | 4 | |
t Stat | 3.810317378 | |
P(T<=t) one-tail | 0.009467489 | |
t Critical one-tail | 2.131846786 | |
P(T<=t) two-tail | 0.018934979 | |
t Critical two-tail | 2.776445105 |
this is one-sided test
p-value= 0.00946 <0.05
we reject the null hypothesis
c)
yes,
L.A researcher suspects that college students test anxiety decreases the longer they are in college. After...
An educational researcher wishes to know if there is a difference in academic performance for college freshmen that live on campus and those that commute. Data was collected from 266 students. Can we conclude that freshman housing location and academic performance are related? Below Average Above Average Total 197 Location Average On campus 95 Off campus 135 Total 130 69 266 Copy Data Step 1 of 8: State the null and alternative hypothesis.
Are college students who take a freshman orientation course more likely to stay in college than those who do not take such a course? An article reported that out of 100 randomly selected college students who participated in an orientation course 57 returned for a second year. Of the 95 randomly selected students who did not take the orientation course, 40 returned for a second year. Test the claim that a larger proportion of college students return for a second...
A researcher is interested in determining whether there is a difference in male college students and female college students' preference for taking online classes over on-campus classes. The researcher surveys 82 female students, and found that 15 preferred online classes. The researcher surveys 70 male students, and found that 10 preferred online classes. Let's perform a hypothesis test at the 5% significance level. Test whether the proportion of females who prefer online classes is greater than the proportion of males...
a random sample of 10 college students are given an anxiety test before and after some intervention. Can we could that the intervention was effective to decrease the anxiety level of the students ? The > score means the > anxiety. 02.05 student Before 54 After 50 32 36 2 a + 5. 6 7 70 42 48 50 44 80 45 75 45 43 70 39 30 8 9 10 82 #A: If we measure the anxiety before and...
A researcher is interested in determining whether there is a difference in male college students and female college students' preference for taking online classes over on-campus classes. The researcher surveys 82 female students, and found that 15 preferred online classes. The researcher surveys 70 male students, and found that 10 preferred online classes. Let's perform a hypothesis test at the 5% significance level. Test whether the proportion of females who prefer online classes is greater than the proportion of males...
Multiple Choice Kim works in the undergraduate advising office and has noticed that students frequently report have more academic difficultly during their first year or college than during their later years. She finds this curious, especially since coursework in later years tends to be more demanding. Her co-worker, Kirk, points out that while freshman classes may be less demanding, students have less one-on-one instruction and students are still acclimating to college during their first year. To test whether students perform...
An education researcher claims that 54% of college students work year-round. In a random sample of 200 college students, 108 say they work year-round. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal. Do...
1. Nine students took the SAT test. Their scores are listed below. Later on, they took a test preparation course and retook the SAT. Their new scores are listed below. Use the Sign test to test the claim that the test preparation has no effect on their scores. Use α = 0.05. Student 1 2 3 4 5 6 7 8 9 Before 860 820 910 990 1000 930 870 1180 920 After 880 820 900 1030 1030 940 860...
A researcher with the Department of Education followed a cohort of students who graduated from high school in a certain year, monitoring the progress the students made toward completing a bachelor's degree. One aspect of his research was to determine whether students who first attended community college took longer to attain a bachelor's degree than those who immediately attended and remained at a 4-year institution. The data in the table attached below summarize the results of his study. Complete parts...
An education researcher claims that at most 8% of working college students are employed as teachers or teaching assistants. In a random sample of 200 working college students, 10% are employed as teachers or teaching assistants. At a = 0.01, is there enough evidence to reject the researcher's claim? Complete parts (a) through (e) below. (a) Identify the claim and state Ho and Ha Identify the claim in this scenario. Select the correct choice below and fill in the answer...