Homework Answers
Dr. Lawson should use Independent Measures t-test, to test whether there is a statistically significant difference between the means in two unrelated groups.
Add Answer to:
QUESTION 3 Dr. Lawson wants to determine if student happiness is greater this semester with his...
A professor believes the class he is teaching in the current semester is below the average...
A professor believes the class he is teaching in the current semester is below the average of the classes he has taught. In order to test this hypothesis, he analyses the scores of tests of all 120 students he teaches this semester. Their average score of this test is 79 out of 100, with a standard deviation of 12. The mean score of the tests for all students that he has taught for the last thirty-two years is 83 out...
At a university, the average cost of books per student has been $600 per student per...
At a university, the average cost of books per student has been $600 per student per semester. The Dean of Students believes that the costs are increasing and that the average is now greater than $600. He surveys a sample of 40 students and finds that for the most recent semester their average cost was $645 with a standard deviation of $75. What is the test value for this hypothesis test? Test value: ? Round your answer to two decimal...
Indicate the correct test procedure and reasoning. A researcher wishes to determine whether listening to music...
Indicate the correct test procedure and reasoning. A researcher wishes to determine whether listening to music affects students' performance on memory test. He randomly selects 50 students and has each student perform a memory test once while listening to music and once without listening to music. He obtains the mean and standard deviation of the 50 "with music" scores and obtains the mean and standard deviation of the 50 "without music scores" O Two-sample t-test, since the researcher has two...
A student believed that students in a Health Sciences program at his college studied, on average,...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean Health Sciences 42 24.3 5.65 Other Programs 35 22.0 8.35 Let u...
A student believed that students in a Health Sciences program at his college studied, on average,...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. n Sample Mean Sample Standard Deviation Health Sciences 42 24.3 5.65 Other Programs 35 22.0 8.35 Let µ1...
A researcher wants to know if students at UCLA have a similar GPA average as all...
A researcher wants to know if students at UCLA have a similar GPA average as all college students world-wide. The world wide average is 2.8 with a standard deviation of 0.44. The researcher randomly gets the GPA of 100 UCLA students and determines the sample mean to be 2.7 with a standard deviation of 0.38. What is the best statistical test to use to determine if the GPA of UCLA students is similar to the world wide average? A. One...
Dr. Hanh hypothesizes that her statistics course will have an impact on student life satisfaction. To...
Dr. Hanh hypothesizes that her statistics course will have an impact on student life satisfaction. To test this hypothesis, she collects life satisfaction ratings for all students in the course at the start of the semester and again at the end of the semester. Below are the data. What can Dr. Hanh conclude with an an α of 0.05? start end 82 75 81 91 87 84 91 84 93 90 87 79 a) What is the appropriate test statistic?...
A student believed that students in a Health Sciences program at his college studied, on average,...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean 42 Health Sciences 24.3 5.65 35 Other Programs 22.0 8.35 Let My...
A student believed that students in a Health Sciences program at his college studied, on average,...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean Health Sciences 42 24.3 5.65 Other Programs 35 22.0 8.35 What is...
QUESTION 3 An instructor of an extremely large class (1000 students) starts grading an exam. After...
QUESTION 3 An instructor of an extremely large class (1000 students) starts grading an exam. After grading 100 of the assignments he calculates the sample average as 80 with a standard deviation of 10, He then correctly determines that he can 95% confident that the average student score is between 78.04 and 81.96. He continues grading, and after grading a total of 400 exams the sample average is 80 with a sample deviation of 20. How confident is he that...
Indicate the correct test procedure and reasoning. A researcher wishes to determine whether listening to music affects students' performance on memory test. He randomly selects 50 students and has each student perform a memory test once while listening to music and once without listening to music. He obtains the mean and standard deviation of the 50 "with music" scores and obtains the mean and standard deviation of the 50 "without music scores" O Two-sample t-test, since the researcher has two...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean Health Sciences 42 24.3 5.65 Other Programs 35 22.0 8.35 Let u...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean 42 Health Sciences 24.3 5.65 35 Other Programs 22.0 8.35 Let My...
A student believed that students in a Health Sciences program at his college studied, on average, more than students in other programs. He decided to assess whether this was true by collecting data on the typical number of hours per week that students studied during the semester. He collected data from a random sample of students. The table below summarizes the results. Sample Standard Deviation n Sample Mean Health Sciences 42 24.3 5.65 Other Programs 35 22.0 8.35 What is...
QUESTION 3 An instructor of an extremely large class (1000 students) starts grading an exam. After grading 100 of the assignments he calculates the sample average as 80 with a standard deviation of 10, He then correctly determines that he can 95% confident that the average student score is between 78.04 and 81.96. He continues grading, and after grading a total of 400 exams the sample average is 80 with a sample deviation of 20. How confident is he that...
Most questions answered within 3 hours.
-
An infinite sheet of charge that has a surface charge density of
39 nC/m2 lies in...
asked 42 minutes ago -
After watching the lectures I am still having a hard time
understanding these equations.
1. The...
asked 1 hour ago -
Testing:
H0:μ=56.9
H1:μ<56.9
Your sample consists of 23 subjects, with a mean of 56.3 and
standard...
asked 1 hour ago -
straight wire, labeled as Wire A, lies horizontally on a
tabletop and is oriented to run...
asked 1 hour ago -
For a Chi-Squared Goodness of Fit Test about a uniform
distribution, complete the table.
Round to...
asked 2 hours ago -
Milk of magnesia is only slightly soluble in water. Kc for the
reaction Mg(OHs)(s)>Mg2+(a) + 2OH-1(aq)...
asked 2 hours ago -
Excel's HYPGEOM.DIST function can be used to compute _____.
a. both hypergeometric probabilities and cumulative
hypergeometric...
asked 2 hours ago -
The rocket used for the human lunar missions was the Saturn V
rocket. At liftoff the...
asked 2 hours ago -
1. The East Street Bagel Shop has a weekly demand for 3,500
bagels, which they make...
asked 2 hours ago -
paraphrasing each paragraph
“Where two or more persons knowingly act together unlawfully,
the act of each...
asked 2 hours ago -
The lateral line system in fish is contained which of the
following?
chemoreceptors
photoreceptors
mechanoreceptors
odor...
asked 2 hours ago -
Find the y-intercept of y =-5 x. The y-intercept of y equals
negative 5 x is______...
asked 2 hours ago