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Roman55 [17]
1 year ago
8

a set of quiz scores is shown in the histogram below. the mean of the data set is 6.625 and the population standard deviation is

1.9 How many numbers in the data set are within 1 standard deviation of the mean? a)7 b)10 c)12 d)13

Mathematics
1 answer:
borishaifa [10]1 year ago
5 0

Given

Mean = 6.625

Standard Deviation = 1.9

Values within 1 standard deviation of mean, mean:

[tex]\begin{gathered} 6.625-1.9<em>We look at the number of values at 5, 6, 7, and 8.</em>

<em />

<em>5 = 2 people</em>

<em>6 = 2 people</em>

<em>7 = 5 people</em>

<em>8 = 3 people</em>

<em />

Total = 2 + 2 + 5 + 3 = 12 people

<h2>Answer</h2>

C

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I need help on this aswell
Katena32 [7]

Answer:

Graph C

Step-by-step explanation:

Hi there!

The given linear equations are organized in slope-intercept form: y=mx+b where <em>m</em> is the slope of the line and <em>b</em> is the y-intercept, or the value of y when the line crosses the y-axis.

y = 2x + 4

Here, the <em>b</em> value is 4. Therefore, the y-intercept of this line is 4.

y = -3x - 2

Here, the <em>b</em> value is -2. Therefore, the y-intercept of this line is -2.

To identify the graph that models these equations, we just have to look for the graph where the lines cross the y-axis at 4 and -2.

The only graph that does this is graph C.

I hope this helps!

8 0
3 years ago
Which ratios correctly compare bananas to apples, as shown in the picture ( 6 apples in a circle and 1 banana in the center ) ch
Licemer1 [7]

Answer:

6:1

Step-by-step explanation:

There are 6 apples t o1 banana

(This is all i can do would have been easier with picture)

5 0
3 years ago
Read 2 more answers
Jimmy has listed the amount of money in his wallet for each of the last ten days. He decides to remove day 7, as that was payday
abruzzese [7]

Answer:

The mean will reduce

Step-by-step explanation:

The total amount of money for the ten days divided by number of days will give mean 1, M₁

Removing the value for day seven will reduce the sum of money as it will be for 9 days only.In finding the mean, you will divide by 9 days to get mean M₂

Mean M₂ < M₁

8 0
3 years ago
True or False <br> No links
AlladinOne [14]

Answer:

False

<em>Brainliest, please!</em>

Step-by-step explanation:

+ + = +

- - = +

+ - = -

- + = -

7 0
3 years ago
Read 2 more answers
Given f(x) and g(x) = f(x + k), use the graph to determine the value of k.
dedylja [7]

g(x) is basically transformed f(x). First, let's focus on f(x) graph. Notice how the graph has slope of 1 and intersect y-axis at (0,0).

Which means that our equation for f(x) is:

\large{f(x) = x}

Now then we focus on g(x). g(x) is f(x+k). That means if f(x) = x then f(x+k) would mean substitute x = x+k in the equation.

\large{f(x + k) = x + k }\\  \large{g(x) = x + k}

Next, we want to find the value of k. In the slope-intercept form or y = mx+b where m = slope and b = y-intercept. Notice the g(x) graph and see that the graph intersects y-axis at (0,4). Therefore k = y-intercept = 4.

\large{g(x) = x + 4}

Answer

  • g(x) = x+4
  • Therefore the value of k is 4.
3 0
3 years ago
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