« previous next »

Author Question: A random sample of 250 students at a university finds that these students take a mean of 14.6 credit ... (Read 114 times)

Mr. Wonderful

  • Hero Member
  • *****
  • Posts: 866
on: Jun 24, 2018
A random sample of 250 students at a university finds that these students take a mean of 14.6 credit hours per quarter with a standard deviation of 1.9 credit hours. The 90 confidence interval for the mean is 14.6+-0.198 Interpret the interval.
 
  A) 90 of the students take between 14.402 to 14.798 credit hours per quarter.
  B) The probability that a student takes 14.402 to 14.798 credit hours in a quarter is 0.90
  C) We are 90 confident that the average number of credit hours per quarter of the sampled students falls in the interval 14.402 to 14.798 hours.
  D) We are 90 confident that the average number of credit hours per quarter of students at the university falls in the interval 14.402 to 14.798 hours.

Question 2

A random sample of 250 students at a university finds that these students take a mean of 14.7 credit hours per quarter with a standard deviation of 1.9 credit hours. Estimate the mean credit hours taken by a student each quarter using a 95 confidence interval. Round to the nearest thousandth.
 
  A) 14.7  .236 B) 14.7  .015 C) 14.7  .171 D) 14.7  .011


medine

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jun 24, 2018
Answer to Question 1

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Did you know?

More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Did you know?

According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.

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.

Sample hypoglycemic protocol. Sample hypoglycemic protocol.
Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19 Model of a longitudinal study in which 983 students were surveyed in 1984 and then again in 1985, 19
Sample Advance Directive Cont. Sample Advance Directive Cont.
Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers. Schematic representations of (a) random, (b) alternating, (c) block, and (d) graft copolymers.
A company that sells sweatshirts finds that the profit can be modelled by P(s)= ... A company that sells sweatshirts finds that the profit can be modelled by P(s)= ...
Discrete random variables- Probability Distribution Function Discrete random variables- Probability Distribution Function
Video: Baroreceptor Reflex

For a complete list of videos, visit our video library