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Solnce55 [7]
2 years ago
13

If the standard deviation of an exam is 5, the z-score us 1.95 and the mean is 80; what is the actual test score? (Round the ans

wer to the nearest hundredth)
Mathematics
1 answer:
skad [1K]2 years ago
6 0

If the standard deviation of an exam is 5, the z-score us 1.95 and the mean is 80, the actual test score is; 89.75

<h3>How to solve z-score problems?</h3>

We are given;

Standard deviation; s = 5

z-score = 1.95

Mean = 80

Formula for z-score is;

z = (x' - μ)/σ

Thus;

1.95 = (x' - 80)/5

1.95 * 5 = (x' - 80)

9.75 = x' - 80

x' = 80 + 9.75

x' = 89.75

Read more about Z-score Problems at; brainly.com/question/25638875

#SPJ1

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Answer:

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Step-by-step explanation:

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6x^3+13x^2+16 is the result.
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3 years ago
Swati recorded this data set, which contains an outlier.
podryga [215]

Answer:

lower quartile: 163  upper quartile: 184

Step-by-step explanation:

1. put the numbers in order from least to greatest. 97, 163, 169, 175, 184, 199

2. find the median. 172

3. find the median of the first 3 numbers to get your Q1. 163

4. find the median of the last 3 numbers to get your Q3. 184

3 0
3 years ago
U will be made brainiest if this answer is right
Daniel [21]

Answer:

x= -7

Step by Step Explanation:

We can write them both like functions like this

A= 5x- 4

B= 3x+ 8

The output of A will be three times the output of B

A=3b

We replace with the functions

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We solve for x

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5x- 9x= 24 + 4

-4x= 28

x= 28 - 4

x= -7

The output that makes the out put of A 3 times the output of B is -7

Hope it helped

4 0
3 years ago
You invest $2,000 in an account that is compounded annually at an interest rate of 5%. You never withdraw money from the account
Yuki888 [10]
Formula for amount for compound interest:

Amount, A =  P(1 + r/100)^n

Where r is rate, P is principal, and n is the number of years.

P = 2000, r = 5, n = t years.

A = 2000( 1 + 5/100)^t

A = 200(1+0.05)^t

A = 2000(1.05)^t

A(t) = 2000(1.05)^t

None in the option look like the answer we have.

Except you didn't type the last option correctly.    

5 0
3 years ago
Read 2 more answers
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