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
Marysya12 [62]
4 years ago
8

An insurance company finds that the ages of motorcyclists killed in crashes are normally distributed with a mean of 26.9 years a

nd a standard deviation of 8.4 years. a) If we randomly select one such motorcyclist, find the probability that he or s he was under 25 years of age.
Mathematics
2 answers:
MrRissso [65]4 years ago
5 0

Answer:

0.41053

Step-by-step explanation:

z=\frac{x-\mu}{\sigma}

z=\frac{25-26.9}{8.4}

z=-0.2262

P(X<25)=P(z<-0.2262)

=1-P(z<0.2262)

=1-0.58947

P(x<25) = 0.41053

The probability that a randomly selected person is under the age of 25 is 0.41053.

mel-nik [20]4 years ago
3 0

Answer:

0.41053

Step-by-step explanation:

The z-score, also known as standard score / z-value / normal score. It is a quantity without dimensions which can be used to determine number of standard deviations by which a number is far from the mean value. Numbers over the mean have positive z-scores and  below the mean have negative.

Here X is below the the mean so the z score is negative.

As we know

Z Score = (x - μ) / σ

Z Score = ( 25 - 26.9 ) / 8.4

Z score = -0.2262

Now We calculate P Value

P(X<25)=P ( z < -0.2262 )

P(X<25) =1 - P ( z < 0.2262)

P(X<25) =1 - 0.58947

P(x<25) = 0.41053

The probability that he or she was under 25 years of age is 0.41053.

You might be interested in
Estimate. Them multiply. Use your estimate to check your answer. For 18×8
frez [133]

Answer:

120

Step-by-step explanation:

18x8 is 124 but if you estimate then it is 120 bc 4 or less let it rest 5 or more add one more.

7 0
3 years ago
Pls help me on this question :-
Nastasia [14]

Answer:

We conclude that the rule for the table in terms of x and y is:

  • y = 3x+2

Step-by-step explanation:

The table indicates that there is constant change in the x and y values, meaning the table represents the linear function the graph of which would be a straight line.

We know the slope-intercept form of the line equation

y = mx+b

where m is the slope and b is the y-intercept.

Taking two points

  • (-2, -4)
  • (-1, -1)

Finding the slope between (-2, -4) and (-1, -1)

\mathrm{Slope}=\frac{y_2-y_1}{x_2-x_1}

\left(x_1,\:y_1\right)=\left(-2,\:-4\right),\:\left(x_2,\:y_2\right)=\left(-1,\:-1\right)

m=\frac{-1-\left(-4\right)}{-1-\left(-2\right)}

m=3

We know that the y-intercept can be determined by setting x = 0 and finding the corresponding y-value.

Taking another point (0, 2) from the table.

It means at x = 0, y = 2.

Thus, the y-intercept b = 2

Using the slope-intercept form of the linear line function

y = mx+b

substituting m = 3 and b = 2

y = 3x+2

Therefore, we conclude that the rule for the table in terms of x and y is:

  • y = 3x+2
7 0
3 years ago
7y means
olga55 [171]
Answer:

C

Explanation:

When a number is connected to a variable, (letter) you are multiplying them.
7 0
3 years ago
What does the combine place value strategy make it easier to find the difference
azamat
This may help you but I'm not so sure tho

7 0
3 years ago
Simplify: 6y + 5z + 8y – 3z
REY [17]
6y + 5z +8y- 3z \\&#10;14y + 2z\\ \\&#10;2 (7 y + z) &#10;
7 0
3 years ago
Read 2 more answers
Other questions:
  • A movie theater sold 422 tickets on Friday. On Saturday, they sold 518 tickets. What was the approximate percentage that ticket
    13·1 answer
  • Use the expansion of (4x+3)^3 to find the exact value of (4.02)^3
    11·1 answer
  • Please help! I’ll give brainliest!
    14·2 answers
  • A mouse has made holes in opposite corners of a rectangular kitchen. Starting from its hole
    7·1 answer
  • Choose the equation that represents the graph below.
    9·2 answers
  • Find the value of h(-67) for the function below.
    8·1 answer
  • -100x - 100 = 0<br>-100x = ?<br> x = ?​
    9·2 answers
  • Which fractions are equal to 2/3 choose ALL the correct answers.<br><br> 6/7, 5/6, 8/12, 4/5, 4/6
    15·2 answers
  • 7x - 4y = -5 ordered pair
    8·1 answer
  • Show that P = 6x + 2
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!