Author Question: We determine the approximate width of the classes by subtracting the smallest observation from the ... (Read 35 times)

schs14

  • Hero Member
  • *****
  • Posts: 569
We determine the approximate width of the classes by subtracting the smallest observation from the largest and dividing the answer by the number of ___________________ _.
 Fill in the blank(s) with correct word

Question 2

Students in statistics classes were asked whether they preferred a 10-minute break or to get out of class 10 minutes early. In a random sample of 150 students, 40 preferred a 10-minute break, 80 preferred to get out 10 minutes early, and 30 had no preference. We want to determine if there is a difference in students' preferences. The hypothesis is to be tested at the 5 level of significance. The decision rule is not to reject the null hypothesis if _____.
 a. 1.96 < z < 1.96
  b. 1.645 < z < 1.645
  c. z > 1.96 or z < 1.96
  d. the number of + signs is greater than or equal to 20 and less than or equal to 130



AmberC1996

  • Sr. Member
  • ****
  • Posts: 317
Answer to Question 1

classes
intervals

Answer to Question 2

a



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

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

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Did you know?

Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Never take aspirin without food because it is likely to irritate your stomach. Never give aspirin to children under age 12. Overdoses of aspirin have the potential to cause deafness.

For a complete list of videos, visit our video library