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
Stolb23 [73]
2 years ago
7

A set of wrist watch prices are normally distributed with a mean of 767676 dollars and a standard deviation of 101010 dollars. W

hat proportion of wrist watch prices are between 636363 dollars and 909090 dollars? You may round your answer to four decimal places. S

Mathematics
1 answer:
Akimi4 [234]2 years ago
7 0

Answer:

0.8224

Step-by-step explanation:

Data

  • mean: $76
  • standard deviation, sd: $10
  • first value of interest, x1: $63
  • second value of interest, x2: $90

z-score for x1:

z1 = (x1 - mean)/sd = (63 - 76)/10 = -1.3

z-score for x2:

z2 = (x2 - mean)/sd = (90 - 76)/10 =  1.4

The  proportion of wrist watch prices are between $63 and $90 is:

P(z1 < z < z2) = P(z < 1.4) - P(z < -1.3)

P(z < 1.4) = 0.9192 (see first picture attached)

P(z < -1.3) = 0.0968 (see second picture attached)

P(z1 < z < z2) = 0.9192 - 0.0968 = 0.8224

You might be interested in
Another question (picture)
ASHA 777 [7]


\left( 16 x^8 y^{-12} \right)^{\frac 1 2} = 16^{\frac 1 2} (x^8)^{\frac 1 2} (y^{-12})^{\frac 1 2} = 4 x^4 y^{-6} = \dfrac{4 x^4}{y^6}


Third choice



8 0
3 years ago
What conclusion can you make from the information below?
mel-nik [20]

Answer:

A.louis drive a chevolet

Step-by-step explanation:

from the question three different people drive different cars . since two out of the three people has been excluded from driving a particular car i.e the third person is the one driving Chevrolet

5 0
3 years ago
A measure of______ for a numerical data set summarizes all of its values with a single number? A) symmetry B)shape C) deviation
rusak2 [61]

Answer:

D) center

Step-by-step explanation:

i am taking the test rn and i got it correct just now

-chilly

8 0
3 years ago
Change 1/2 as a fraction
dimaraw [331]

Answer:

0.50 ,1/2 as a fraction 1/2

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
The perimeter of a right triangle is 24 meters, and the area is 24 square meters. The lengths of the sides are each multiplied b
IRINA_888 [86]

Answer:

384m

Step-by-step explanation:

24 x 4 = 96

96 x 4 = 384

4 0
3 years ago
Other questions:
  • 2x + 3 = 4x + 2<br><br> No solution, One solution, or Many solutions
    8·2 answers
  • Which is not a true statement? A 0.3711 &gt; 0.3801 B 0.4290 = 0.429 C 0.6798 &lt; 0.6801 D 0.943 &gt; 0.1
    6·2 answers
  • Starting at home, Ishaan traveled uphill to the gift store for 18 minutes at just 10 mph. He then traveled back home along the s
    5·1 answer
  • The two lines graphed
    8·2 answers
  • a small submarine is at an elevation of -30 feet compared to sea level. what is its elevation after it ascends 9 feet? PLEASE HE
    11·2 answers
  • Comparing symbols in a picture graph
    15·2 answers
  • What is the relationship between the number of sides of the base of a prism and the number of lateral faces? The number of sides
    9·2 answers
  • HELP! I WILL GIVE BRAINLIEST!
    13·2 answers
  • Anyone who know what the answer please please faster???!??!
    5·2 answers
  • The nth term of a sequence is<br> 2n^2 + 4n - 1<br> Work out the 10th term of the sequence
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!