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 161 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
Wow, this really help

T4T

  • Member
  • Posts: 348
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

The FDA recognizes 118 routes of administration.

Did you know?

The Centers for Disease Control and Prevention (CDC) was originally known as the Communicable Disease Center, which was formed to fight malaria. It was originally headquartered in Atlanta, Georgia, since the Southern states faced the worst threat from malaria.

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

The Food and Drug Administration has approved Risperdal, an adult antipsychotic drug, for the symptomatic treatment of irritability in children and adolescents with autism. The approval is the first for the use of a drug to treat behaviors associated with autism in children. These behaviors are included under the general heading of irritability and include aggression, deliberate self-injury, and temper tantrums.

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

The chromosomal basis of independent assortment. The chromosomal basis of independent assortment.
Part of this child's pattern of daily living is attending child care during the work day Part of this child's pattern of daily living is attending child care during the work day
Major Findings of the High Scope Preschool Study High Scope participants showed better academic per Major Findings of the High Scope Preschool Study High Scope participants showed better academic per
To help his students understand the term generalized other, Mead used baseball as an illustration. ... To help his students understand the term generalized other, Mead used baseball as an illustration. ...
Daily Alertness Activity (2 of 2) Daily Alertness Activity (2 of 2)
If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ... If the random variable x is exponentially distributed with parameter λ = 4, then P(x ≤ ...
Video: Role of the urinary system - acidosis and alkalosis

For a complete list of videos, visit our video library