This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: Independent random samples of the scores of 10 daily quizzes from day students and 15 quizzes from ... (Read 132 times)

lbcchick

  • Hero Member
  • *****
  • Posts: 550
on: Jun 24, 2018
Independent random samples of the scores of 10 daily quizzes from day students and 15 quizzes from evening students were gathered. It was decided to use the Mann-Whitney-Wilcoxon test to determine if there is a significant difference between the populations of scores for the two groups of students.
 a. Provide the hypotheses for this test.
  b. Compute the mean W.
  c. Compute the standard deviation W.
  d. The sum of the ranks for the day students was determined to be 184.5 . Compute the test statistic z.
  e. Use  = .05 and test to determine if there is a significant difference in the populations of the scores of the two groups.

Question 2

_____ can be used to determine the percentage of data values that must be within one, two, and three standard deviations of the mean for data having a bell-shaped distribution.
 a. Chebyshev's theorem
  b. The empirical rule
  c. A five-number summary
  d. A box plot


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

ynlevi

  • Sr. Member
  • ****
  • Posts: 338
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. H0: The two populations are identical
Ha: The two populations are not identical
b. 130
c. 18.0278
d. 3.00
e. p-value = .0026 <  = .05; the null hypothesis is rejected; populations are not identical, there is significant difference between the populations of scores for the two groups of students.

Answer to Question 2

b


lbcchick

  • Member
  • Posts: 550
Reply 2 on: Jun 24, 2018
YES! Correct, THANKS for helping me on my review

softEldritch

  • Member
  • Posts: 334
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

Independent Assortment p1 Independent Assortment p1
Tooth enamel is laid down in daily increments, with darker bands accumulating about once a week. Tooth enamel is laid down in daily increments, with darker bands accumulating about once a week.
Both students with intellectual disability (ID) and students who are intellectually gifted need ... Both students with intellectual disability (ID) and students who are intellectually gifted need ...
Massage Room Daily Maintenance Checklist Massage Room Daily Maintenance Checklist
Food Sources of Carbohydrates You need to eat at least 130 grams of carbohydrates daily Food Sources of Carbohydrates You need to eat at least 130 grams of carbohydrates daily
Mendel’s test cross to verify independent assortment Mendel’s test cross to verify independent assortment
Video: Cognitive development by Piaget (Preoperational stage or intelligence)

For a complete list of videos, visit our video library