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

Author Question: A continuous random variable x is normally distributed with a mean of 250 and a standard deviation ... (Read 99 times)

nramada

  • Hero Member
  • *****
  • Posts: 580
on: Jun 24, 2018
A continuous random variable x is normally distributed with a mean of 250 and a standard deviation of 50 . Find the z-score for x = 285.

Question 2

Suppose it is known that 60 of students at a particular college are smokers. A sample of 500 students from the college is selected at random. Approximate the probability that at least 280 of these students are smokers.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

amy.lauersdorf90

  • Sr. Member
  • ****
  • Posts: 327
Reply #1 on: Jun 24, 2018
Answer to Question 1

0.7

Answer to Question 2

0.9664


nramada

  • Member
  • Posts: 580
Reply 2 on: Jun 24, 2018
:D TYSM

nothere

  • Member
  • Posts: 324
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

Did you know?

There are immediate benefits of chiropractic adjustments that are visible via magnetic resonance imaging (MRI). It shows that spinal manipulation therapy is effective in decreasing pain and increasing the gaps between the vertebrae, reducing pressure that leads to pain.

Did you know?

During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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.

Absorption & Stripping Design Random packing materials Absorption & Stripping Design Random packing materials
How to quickly find the vertex of a quadratic equation that is in standard form How to quickly find the vertex of a quadratic equation that is in standard form
Measuring the client’s weight with a standard platform scale Measuring the client’s weight with a standard platform scale
A karyotype arranges the chromosomes in a standard format A karyotype arranges the chromosomes in a standard format
Separation of variable number tandem repeat (VNTR) alleles after PCR amplification Separation of variable number tandem repeat (VNTR) alleles after PCR amplification
Video: Red alga life cycle Animation

For a complete list of videos, visit our video library