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

Author Question: Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500 ... (Read 180 times)

bio_gurl

  • Hero Member
  • *****
  • Posts: 524
on: Jun 24, 2018
Simple random sampling has been used to obtain a sample of 81 elements from a population of size 500 . The sample mean is 120, and the sample standard deviation is determined to be 36.
 a. Estimate the standard error of the mean.
  b. Develop an approximate 95 confidence interval for the population mean.
  c. Estimate the population total.
  d. Develop an approximate 95 confidence interval for the population total.

Question 2

According to the Empirical Rule, if the data form a bell shaped normal distribution approximately ___________________ _ percent of the observations will be contained within 3 standard deviations around the mean.
 Fill in the blank(s) with correct word


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

heyhey123

  • Sr. Member
  • ****
  • Posts: 353
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. 3.7 (rounded)
b. 112.68 to 127.32
c. 60,000
d. 56,338.3 to 63,661.7

Answer to Question 2

99.7


bio_gurl

  • Hero Member
  • *****
  • Posts: 524
Reply #2 on: Jun 24, 2018
Correct answers!


heyhey123

  • Sr. Member
  • ****
  • Posts: 353
Reply #3 on: Jun 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

Did you know?

Signs of depression include feeling sad most of the time for 2 weeks or longer; loss of interest in things normally enjoyed; lack of energy; sleep and appetite disturbances; weight changes; feelings of hopelessness, helplessness, or worthlessness; an inability to make decisions; and thoughts of death and suicide.

Did you know?

Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

Did you know?

In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).

Did you know?

According to animal studies, the typical American diet is damaging to the liver and may result in allergies, low energy, digestive problems, and a lack of ability to detoxify harmful substances.

The proboscis monkey demonstrates that large gut size contributes to a lower EQ. The proboscis monkey demonstrates that large gut size contributes to a lower EQ.
Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100 Risk of death from motorcycle accidents (dashed lines) and passenger accidents (solid lines) per 100
The formed elements: In this image, the red cells are red, the white cells are white, and the ... The formed elements: In this image, the red cells are red, the white cells are white, and the ...
Population Growth and Change Population Growth and Change
Population Growth Population Growth
The Size Of Your Baby’s Stomach The Size Of Your Baby’s Stomach
Video: Requirements for nervous signals

For a complete list of videos, visit our video library