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
Wewaii [24]
3 years ago
6

A gray-scale digital camera with 1,000,000 pixels takes a picture (the picture is made of 1,000,000 parts and each part has a ce

rtain amount of gray). A histogram is made where the data is the amount of gray in each of these parts. The histogram looks bell-shaped with a mean of 125 gray levels and a standard deviation of 15.
Approximately how many pixels have a gray scale of between 110 and 140?

A. 30
B. 500,000
C. 680,000
D. 950,000
Mathematics
1 answer:
pashok25 [27]3 years ago
5 0
Let X be a random variable representing the mean gray scale of each pixel.
P(110 ≤ X ≤ 140) = P(X < 140) - P(X < 110) = P(z < (140 - 125)/15) - P(z < (110 - 125)/15) = P(z < 1) - P(z < -1) = P(z < 1) - [1 - P(z < 1)] = 2P(z < 1) - 1 = 2(0.84134) - 1 = 1.68268 - 1 = 0.68268

Number of pixels that have gray scale of between 110 and 140 = 0.68268 x 1000000 = 682680 = approximately 680,000
You might be interested in
About 10% of the human population is left-handed. Suppose a researcher speculates that artists are more likely to be left-handed
nevsk [136]

Answer:

Given the information in the question;

a) The parameter of interest is the population of artists who are left-handed and its is 10% = (10/1000 = 0.10

b) The Null hypothesis and alternative hypothesis are;

<em>H₀ : p </em>= 0.10

<em>H₁ : p</em> > 0.10

c) The sample proportion is calculated as:

p = number of left handed artist / sample size

p = 26 / 200

p = 0.13

d) To find the p-value, The researcher should calculate the probability that the sample proportion would be 0.13 or larger for a sample of size 200 if the population proportion is actually 0.10.

4 0
4 years ago
Pls respond algebra 1 super easy!! thank you!!
WARRIOR [948]
I think you have to like find the median and then you have to see if the mean is more
6 0
3 years ago
Write an inequality that could be used to solve the following problem. Do not solve. Sal's Pizza charges $14 for a large cheese
Novosadov [1.4K]
He can get 2 toppings on his pizza because 20-14=6 and 2*3=6
3 0
4 years ago
Find the derivative of the following functions: a. f(x) = (x^3 + 5)^1/4 - 15e^x^3 b. f(x) = (x - 3)^2 (x - 5)/(x - 4)^2(x^2 + 3)
Darya [45]

Answer:

Step-by-step explanation:

Given function is

(a)F(x)=\left ( x^{3}+5\right )^{0.25}-15e^{x^{3}}

F^{'}\left ( x\right )=0.25\left ( x^{3}+5\right )^{-0.75}\frac{\mathrm{d} x^{3}}{\mathrm{d} x}-15e^{x^{3}}\frac{\mathrm{d} x^{3}}{\mathrm{d} x}

F^{'}\left ( x\right )=0.25\left ( x^{3}+5\right )^{-0.75}\times 3x^{2}-15e^{x^{3}}\times \left ( 3x^{2}\right )

(b)F(x)=\frac{\left ( x-3\right )^2\left ( x-5\right )}{\left ( x-4\right )^2\left ( x^{2}+3\right )^5}

F^{'}\left ( x\right )=\frac{\left [ 2\left ( x-3\right )\right \left ( x-5\right )+\left ( x-3\right )^2]\left [ \left ( x-4\right )^2\left ( x^2+3\right )^5\right ]-\left [ 2\left ( x-4\right )^{3}\left ( x^2+3\right )^5+5\left ( x^2+3\right )^4\left ( 2x\right )\left ( x-4\right )^2\right ]\left [ \left ( x-3\right )^2\left ( x-5\right )\right ]}{\left [\left ( x-4\right )^2\left ( x^2+3\right )^5\right ]^2}

6 0
4 years ago
Use substitution to solve the system of equations.
never [62]
Subtract the Y from the x and the x from the y that is how you would get the answer this is how you would find slope
8 0
4 years ago
Other questions:
  • Jakes family is moving to a new home. They packed 22 boxes in 1 5/6 hours.What is the average number of boxes they packed per ho
    8·1 answer
  • Bhavin buys a car in a sale. Before the sale, the cost of the car was £6720 In the sale, the cost of every car is reduced by 20%
    14·2 answers
  • The average housecat sleeps about 2/3 of the day. Most people sleep about 1/3 of a day. Do housecats or people sleeper a greater
    12·1 answer
  • Identify the domain of the equation y = x2 − 6x + 1.
    11·2 answers
  • Find the value of x. Diagram is not to scale
    7·1 answer
  • After purchasing a home for $160,00 the homeowner noticed the suggested value of her house was depreciating by 5% each year.
    6·1 answer
  • 100 POINTS: ANSWER PROPERLY WITH STEPS SHOWN FOR BRAINLIEST AND POINTS!!!!!!!!!!!! GST AND PST VALUES ARE BASED ON CANADA ONTARI
    15·1 answer
  • HELP PLS ITS URGENT !!
    13·1 answer
  • Analyzing factors please help lol
    12·1 answer
  • Translate the sentence into an inequality.<br> The difference of c and 9 is greater than 23.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!