Question

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 certain 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. How many pixels are brighter than 163 gray levels? 5000 10,000 160,000 50,000

Answer 1

Answer:

50,000

Step-by-step explanation:

it's not any of the other answers i don't think, from everyone's ratings and quizlet reviews

Answer 2

There will be approximately 5000 pixels brighter than 163 gray levels. Hence option D is the correct.

What do you mean by standard deviation?

In statistics, Standard deviation is a measure of the variation of a set of values.

σ = standard deviation of population

N = number of observation of population

X = mean

μ = population mean

First, let's determine how many standard deviations from the mean the value;

(163 + 1) = 164

(164 - 125)/15

= 39/15

= 2.6

Now by using a standard normal table, look up 2.6 to determine the percentage of points that would be that far from the mean.

In order to find a value of 0.49534 that is a half value.

So the percentage that will be higher than that will be;

0.5 - 0.49534= 0.00466

Now multiply the number of points overall,

0.00466 * 1000000 = 4660

Therefore, there will be approximately 5000 pixels brighter than 163 gray levels.

Hence option D is the correct.

Learn more about standard deviation and variance:

https://brainly.com/question/11448982

#SPJ5