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
Rufina [12.5K]
2 years ago
7

A credit card company decides to study the frequency with which its cardholders charge for items from a certain change of retail

stores. The data values collected in the study appear to be normally distributed with a mean of 25 charged purchases and a standard distribution of 2 charged purchases. Out of the total number of cardholders about hw many would you expect are charging 27 or more in the study
Mathematics
1 answer:
gregori [183]2 years ago
6 0

Answer:

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

Mean of 25 charged purchases and a standard distribution of 2

This means that \mu = 25, \sigma = 2

Proportion above 27

1 subtracted by the pvalue of Z when X = 27. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{27 - 25}{2}

Z = 1

Z = 1 has a pvalue of 0.8413

1 - 0.8413 = 0.1587

Out of the total number of cardholders about how many would you expect are charging 27 or more in the study?

0.1587*100% = 15.87%

15.87% of the total number of cardholder would be expected to be charging 27 or more in the study.

You might be interested in
Meghan and Sabrina compared the amount of interest they each earned on their savings accounts. Each had deposited $1000, but Meg
Margarita [4]
Sabrina because she earned more money then  meghen
3 0
3 years ago
Read 2 more answers
Find the value of x.
ser-zykov [4K]

Answer:

the value of x will be 24

Step-by-step explanation:

3 0
3 years ago
What number must you add to complete the square?
eimsori [14]

Answer:

36

Step-by-step explanation:

x^2 + 12 x  = 40

To complete the square, take the coefficient of the x term

12

Divide by 2

12/2 = 6

Square it

6^2 = 36

Add 36 to each side

8 0
3 years ago
What is the value of x?
Nonamiya [84]

X = 30 degrees.

See the attached image

7 0
3 years ago
Statements: Reasons:
svlad2 [7]

Answer:

The answer to your question is below

Step-by-step explanation:

I hope it helps you

1.- m ∠2 = m ∠ 3

2.- ∠1 and ∠ 2 are adjacent angles

3.- m∠1 + m∠2 = 180°

4.-

5.- ∠1 and ∠3 are supplementary             linear pair angles are supplementary

8 0
3 years ago
Other questions:
  • The edges of the diameter of a circle are at (-1,2) and (3,-1). Write the equation of the circle in general form.
    14·1 answer
  • Could someone help me with a question?
    15·1 answer
  • Please help! if abcd is dilated by a factor of 3, the coordinate of b would be
    5·2 answers
  • Write out the first six multiple of 3 and 5 in separate lists
    8·2 answers
  • You can tell if the value of a function for a certain interval is positive just by 2 points looking at its graph. If the value i
    5·1 answer
  • 24. Identify the center and radius of the circle given the equation (x +15)2 + (7 - 9)2 = 25 .
    15·1 answer
  • Again can you guys help me
    7·1 answer
  • #9 please help<br><br> I’ll give brainlylist in return
    10·1 answer
  • Please tell me the answer as simple as you can
    7·1 answer
  • I need help with this problem
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!