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nekit [7.7K]
3 years ago
12

What is the standard deviation of a normal distribution, whose mean is 35, in which an x-value of 23 has a z-score of -1.63?

Mathematics
1 answer:
Dvinal [7]3 years ago
6 0

Answer:

7.36

Step-by-step explanation:

z-score is:

z = (x − μ) / σ

Given that z = -1.63, x = 23, and μ = 35:

-1.63 = (23 − 35) / σ

σ ≈ 7.36

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On Friday 1/8 of band practice was spent trying on uniforms the band spent 1/6 of practice on marching the remaining practice ti
4vir4ik [10]

Answer:

2/3 of band practice was spent playing music.

Step-by-step explanation:

First find the common denominator.

6 times 4 is 24

8 times 3 is 24

multiply the numerators by the same value as the denominator (for 1/8 both the 1 and the 8 would be multiplied by 3, and for 1/6 both the 1 and the six would be multiplied by 4)

4/24  +  3/24

next the questions is asking for the remaining practice time.

add numerators when the denominators are the same.

4  +  3  =  7

=  7/24

24/24  -  7/24  =  16/24

(24  -  7  =  16)

now divide both the numerator and denominator by the same number.

16  ÷  8  =  2

24  ÷  8  =  3

The answer would be that 2/3 of band practice was spent playing music.

6 0
4 years ago
Read 2 more answers
88 is aSolution 1/8x=11
jok3333 [9.3K]

Answer:

Yes, 88 is the solution

Step-by-step explanation:

1/8x = 11

Multiply both sides by 8

8(1/8)x = 11 (8)

x = 88

4 0
4 years ago
8 out of every 14 children in a school are boys. What is the ratio of boys to girls in the school?
DochEvi [55]

Answer:

8:6

Step-by-step explanation:

If 8 out of 14 students are boys then the remaining number of students must be girls

So

14-8= 6

There are 6 girls out of the 14

So as a ratio of boys to girls

8:6

7 0
3 years ago
Read 2 more answers
In a class room 3/10 of the students are wearing blue shirts and 3/5 are wearing white shirts there are 20 students In The class
shtirl [24]

Total number of students in the class = 36

Number of students wearing blue shirts = (1/6) * 36

                                                                = 36/6

                                                                = 6

Number of students wearing white shirts = (2/3) * 36

                                                                 = 2 * 12

                                                                 = 24

Then

Number of students not wearing blue or white shirts in the class = 36 - (6 + 24)

                                                                                                       = 36 - 30

                                                                                                       = 6

So 6 students in the class are wearing a shirt other than a blue or a white shirt. I hope the procedure is clear enough for you to understand.

5 0
3 years ago
What's the answer ?<br><br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B245%20%2B%2044%7D%20" id="TexFormula1" title=" \sq
-Dominant- [34]

\huge\mathfrak\pink{Answer...}

+,- 17

\huge\mathfrak\purple{hope \: it \: helps..}

8 0
3 years ago
Read 2 more answers
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