1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
damaskus [11]
2 years ago
14

The length of a phone conversation is normally distributed with a mean of 4 minutes and a standard deviation of .6 minutes. What

is the probability that a conversation lasts longer than 5 minutes? 0.04746 0.45254 0.54746 0.95254
Mathematics
1 answer:
Ivanshal [37]2 years ago
8 0

Answer:

0.04746

Step-by-step explanation:

To answer this one needs to find the area under the standard normal curve to the left of 5 minutes when the mean is 4 minutes and the std. dev. is 0.6 minutes.  Either use a table of z-scores or a calculator with probability distribution functions.

In this case I will use my old Texas Instruments TI-83 calculator.  I select the normalcdf( function and type in the following arguments:  :

normalcdf(-100, 5, 4, 0.6).  The result is 0.952.  This is the area under the curve to the left of x = 5.  But we are interested in finding the probability that a conversation lasts longer than 5 minutes.  To find this, subtract 0.952 from 1.000:   0.048.  This is the area under the curve to the RIGHT of x = 5.

This 0.048 is closest to the first answer choice:  0.04746.

You might be interested in
PLZ HELP 67 POINTS. 1 + 1<br>​
Arada [10]

Answer:

100% its 2 my guy trust meeee

7 0
2 years ago
Read 2 more answers
A piece of furniture has a retail price of $3,200 and is on sale at a 30% discount. how much money will be saved if the piece of
d1i1m1o1n [39]
.30 × 3,200 = 960

$960 will be saved
6 0
2 years ago
Help pls!!!!!!!!!!!!!!!!!
const2013 [10]

Answer: just turn them into decimals and use a calculator then turn them back into fractions in simplified form

Step-by-step explanation:

7 0
3 years ago
Which function has a vertex at ( 2 , -5 )?
Mice21 [21]
The answer is C) y= |x-2| -5
3 0
3 years ago
Plz help me with this algreba question
USPshnik [31]
I can’t see it I’m sorry
3 0
2 years ago
Other questions:
  • Jill’s teacher asked her to construct a rectangular prism from unit cubes. She has built the structure about. In order for Jill
    5·1 answer
  • Sasha drinks 2.5 liters of water each weekday.She drinks a total of 3 liters of water on the weekend.What is the to total volume
    7·1 answer
  • the floor plan of a house is drawn using a scale of in = 8ft. What is the length of the basement if it is 2.5 inches long on the
    5·1 answer
  • Jill’s bowling scores are approximately normally distributed with mean 170 and standard deviation 20, while Jack’s scores are ap
    6·1 answer
  • Name the constant of proportionality for the equation below:<br><br><br><br><br> y = -2/3 x
    13·1 answer
  • PLEASE HELP ME!!! SORRY I CAN ONLY GIVE 30 POINTS
    12·2 answers
  • Find the sine of Write your answer in simplified, rationalized form. Do not round.<br> Please help!!!!!
    7·1 answer
  • JUST THE FIRST ONE EASY PLS ASAP
    15·1 answer
  • A mountain bike is prices at $413 if the sale tax is 6.5 percent what is the cost to purchase the mountain bike ? Round to the n
    14·2 answers
  • The sum of a number $x$ and 4 equals 12.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!