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

Author Question: A sample of 20 items from a population with an unknown is selected in order to develop an interval ... (Read 69 times)

Darron12

  • Full Member
  • ***
  • Posts: 158
on: Mar 25, 2023

Question 1

A random sample of 64 students at a university showed an average age of 25 years and a sample standard deviation of 2 years. The 98% confidence interval for the true average age of all students in the university is


◦

20.5 to 26.5


◦

24.4 to 25.6


◦

23.0 to 27.0


◦

20.0 to 30.0



Question 2

A sample of 20 items from a population with an unknown σ is selected in order to develop an interval estimate of μ. Which of the following is not necessary?


◦

We must assume the population has a normal distribution.


◦

We must use a t distribution.


◦

Sample standard deviation must be used to estimate σ.


◦

The sample must have a normal distribution.

Essentials of Statistics for Business and Economics ¦ Anderson, Sweeney, Williams, Camm, Cochran ¦ 7th Edition
Buy Test-Bank


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by Darron12 on Mar 25, 2023

sakura282000

  • Full Member
  • ***
  • Posts: 159
Reply #1 on: Mar 25, 2023
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
Answer Preview
Only 25% of students answer this correctly


Darron12

  • Member
  • Posts: 158
Reply 2 on: Mar 25, 2023
:D TYSM

frankwu0507

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

The newest statin drug, rosuvastatin, has been called a superstatin because it appears to reduce LDL cholesterol to a greater degree than the other approved statin drugs.

Did you know?

The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

Did you know?

About 60% of newborn infants in the United States are jaundiced; that is, they look yellow. Kernicterus is a form of brain damage caused by excessive jaundice. When babies begin to be affected by excessive jaundice and begin to have brain damage, they become excessively lethargic.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Sample preoperative checklist. Sample preoperative checklist.
Projections of the Racial-Ethnic Makeup of the U.S. Population Projections of the Racial-Ethnic Makeup of the U.S. Population
Selected Antifungal Drugs Selected Antifungal Drugs
Population and Settlement Population and Settlement
Number of Chromosomes in Selected Organisms Number of Chromosomes in Selected Organisms
The order of gene transfer in four Hfr strains The order of gene transfer in four Hfr strains
Video: Arthritis

For a complete list of videos, visit our video library