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

Author Question: The life expectancy in the United States is 75 with a standard deviation of 7 years. A random sample ... (Read 86 times)

P68T

  • Hero Member
  • *****
  • Posts: 509
on: Jun 24, 2018
The life expectancy in the United States is 75 with a standard deviation of 7 years. A random sample of 49 individuals is selected.
 a. What is the probability that the sample mean will be larger than 77 years?
  b. What is the probability that the sample mean will be less than 72.7 years?
  c. What is the probability that the sample mean will be between 73.5 and 76 years?
  d. What is the probability that the sample mean will be between 72 and 74 years?
  e. What is the probability that the sample mean will be larger than 73.46 years?

Question 2

A standard normal distribution is a normal distribution with _____.
 a. a mean of 1 and a standard deviation of 0
  b. a mean of 0 and a standard deviation of 1
  c. any mean and a standard deviation of 1
  d. any mean and any standard deviation


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Dinolord

  • Sr. Member
  • ****
  • Posts: 313
Reply #1 on: Jun 24, 2018
Answer to Question 1

a. .0228
b. .0107
c. .7745
d. .1573
e. .9382

Answer to Question 2

b


P68T

  • Member
  • Posts: 509
Reply 2 on: Jun 24, 2018
Excellent

Chelseyj.hasty

  • Member
  • Posts: 319
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Did you know?

The average person is easily confused by the terms pharmaceutics and pharmacology, thinking they are one and the same. Whereas pharmaceutics is the science of preparing and dispensing drugs (otherwise known as the science of pharmacy), pharmacology is the study of medications.

Did you know?

Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

Did you know?

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

These species are all at risk of extinction. Species with “slow” life-h These species are all at risk of extinction. Species with “slow” life-h
Zebras are several species of African equids (horse family) united by their distinctive black and wh Zebras are several species of African equids (horse family) united by their distinctive black and wh
Continental United States Hurricane Strikes from 1950-2011 Continental United States Hurricane Strikes from 1950-2011
How to manually find the mean, variance, and standard deviation for a set of numbers How to manually find the mean, variance, and standard deviation for a set of numbers
) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase ) Random assortment of maternal (blue) and paternal (purple) chromosomes at metaphase
STDs in the United Stated STDs in the United Stated
Video: Summation - defined, spatial, temporal & AP generation or not

For a complete list of videos, visit our video library