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
horsena [70]
3 years ago
11

A retail store did research and determined that, on average, each customer spends 40 minutes in their store per visit, with a st

andard deviation of 2 minutes. What percentage of customers spend more than 46 minutes?
Mathematics
1 answer:
Blababa [14]3 years ago
6 0

Answer:

0.13% of customers spend more than 46 minutes

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore 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 pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

\mu = 40, \sigma = 2

What percentage of customers spend more than 46 minutes?

This is 1 subtracted by the pvalue of Z when X = 46. So

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

Z = \frac{46 - 40}{2}

Z = 3

Z = 3 has a pvalue of 0.9987

1 - 0.9987 = 0.0013

0.13% of customers spend more than 46 minutes

You might be interested in
Which radical expressions are equivalent to 7 5/4
Troyanec [42]

Answer: = √(22·2) (x2·x) y2 (z4. z) EXAMPLE Put 3√24 x6 y5 z10 in standard form. EXAMPLE Put 3√− 2 x11 y4 in standard form. EXAMPLE Put 4√64 x4 y10 in standard form. DEFINITION Radical expressions are said to be similar when they have the same radical index and the same radicand. EXAMPLES 1. The redial expressions 3 √2 and 5 √2 are similar. 2.

Step-by-step explanation:

Yw and mark me brainiest

4 0
2 years ago
Read 2 more answers
Gabrielle took a Spanish test with 50 questions and answered 44 of them correctly. What percent of the questions did Gabrielle a
mrs_skeptik [129]
She answered 88% correct. 44 times 2 is 88.
7 0
3 years ago
Read 2 more answers
What is 2x=16 i to explan it
valentina_108 [34]

Answer:

2x=16

/2    /2

x=8

Step-by-step explanation:

just need to isolate the x, by dividing by two on both sides.

hope this helps :)

3 0
3 years ago
Read 2 more answers
Why is this app not working?
Aloiza [94]

Answer:

try restarting it or re downloading

3 0
3 years ago
Read 2 more answers
Find the volume of a rectangular prism with length = 9, width = 5, and
MatroZZZ [7]
I’m not gonna play today at the same time
7 0
3 years ago
Other questions:
  • Find the equation for the linear function that passes through the points (−5,−6) and (10,3). Answers must use whole numbers and/
    6·2 answers
  • What is the slope of a line that is perpendicular to 4x-8y=64
    6·1 answer
  • 23. The measure of an angle is 46º. The measure of
    11·2 answers
  • Pls help im having such a bad day already and i get yelled at 24/7
    14·2 answers
  • Please help me nowwww
    6·1 answer
  • Write a number sentence to add 6 ones to 21
    9·2 answers
  • A sequence is always infinite. True False
    5·2 answers
  • Do you add or multiply when you do area ​
    10·2 answers
  • A yard contains 16 ounces. 9 ounces is what fraction of a pound?
    14·2 answers
  • Directions:Classify the following polynomials by degree and number of terms.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!