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
Which table shows an independent quantity of 3 with a corresponding dependent quantity of 6
Ulleksa [173]
The answer is b because it has the 3 with 6 corresponding.<span />
8 0
3 years ago
What will happen if pressure is increased?
Anika [276]

Answer:

the equilibrium will shift towards the side

3 0
3 years ago
PLEASE HELP ME!!!!!
Vlada [557]

Answer:

I'm not 100% sure but I believe the answer is A

4 0
2 years ago
Please help me. I'm stupid.
Gwar [14]

Answer:

\displaystyle 36\:units

Step-by-step explanation:

Split up this Isosceles, Right Triangle into two congruent smaller right triangles. The reflexive side [the line that splits them apart] is 6 units, and both legs are 8 units, leaving the hypotenuses to AUTOMATICALLY be 10 units, according to the Pythagorean Theorem:

\displaystyle a^2 + b^2 = c^2 \\ \\ 6^2 + 8^2 = 10^2 \\ \\ 36 + 64 = 100 \\ \\ 100 = 100

With this Pythagorean Triple, we know that our dimensions are correct. Now, to find the perimeter, just add up all the sides EXCEPT for the divider:

\displaystyle 2[10] + 2[8] = 20 + 16 = 36

I am joyous to assist you anytime.

3 0
3 years ago
Help please!!
kondor19780726 [428]
C is the correct answer. A line is proportional if it is a straight line that passes through the origin, and while it does pass through the origin, it isn’t completely straight.
8 0
2 years ago
Other questions:
  • How do I Find the value of y?
    11·2 answers
  • William says that 15 years from now his age will be 3 times his age 5 years ago if x represent William present age complete the
    5·1 answer
  • How does changing the function from f(x) = −4 cos 3x to g(x) = −4 cos 3x − 6 affect the range of the function?
    11·2 answers
  • The irregular figure on the left has been decomposed into the figures on the right.
    13·2 answers
  • What is 4x-8=9y-5 in standard form
    7·1 answer
  • Can someone please help first answer gets brainlist
    13·1 answer
  • Jim Mead is a veterinarian who visits a Vermont farm to examine prize bulls. In order to examine a bull, Jim first gives the ani
    5·1 answer
  • Richard and teo have a combined age of 42. Richard is 9 years older that twice teos age. How old are Richard and Teo
    9·1 answer
  • Sarah makes a red hair bow using 215 inches of ribbon. She makes a purple hair bow using 18.4 inches of ribbon.
    12·1 answer
  • The height of two plants is in the ratio 7 : 9. The height if the taller plant is 26cm more than the height of the shorter plant
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!