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Vlad [161]
2 years ago
9

The mean score on a physics test was 75 points. Amy’s score was 67 points, which was 2 standard deviations below the mean. What

is the variance of the data set? 2 4 8 16.
Mathematics
1 answer:
Norma-Jean [14]2 years ago
7 0

Answer:

Its 16

Step-by-step explanation:

i had the same question and this was the answer on the unit test

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Can u help me plz its vocabulary​
jeka57 [31]

Answer:

1.

Q- acute

R- right

S-acute

2.

- QRS is a right triangle because it has a small square at the right angle.

hope this helps!

Step-by-step explanation:

6 0
3 years ago
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Find the volume of the solid figure.
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It’s 90 after you multiply the length, width, and height
8 0
3 years ago
$10,000 is compounded semiannually at 12% interest for t years. what expression represents the amount of money after t years?
kari74 [83]
To solve this, you can do the is over of equals to % over hundred.
is         %
__ = ____
of      100
10,000      12
_____ = ____
    t           100
1,000,000=12t
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i hope this helps!
3 0
3 years ago
Find the median. 90, 88, 100, 82, 80.<br> PLEASE
Ludmilka [50]

Answer:

Step-by-step explanation:

80, 82, 88, 90, 100

Now cross out the numbers starting with 80 and 100 and keep going till you get the middle number which would be 88

5 0
3 years ago
Read 2 more answers
The amount of time that a customer spends waiting at an airport check-in counter is a random variable with mean 8.0 minutes and
strojnjashka [21]

Answer:

P ( 5 < X < 10 ) = 1

Step-by-step explanation:

Given:-

- Sample size n = 49

- The sample mean u = 8.0 mins

- The sample standard deviation s = 1.3 mins

Find:-

Find the probability that the average time waiting in line for these customers is between 5 and 10 minutes.

Solution:-

- We will assume that the random variable follows a normal distribution with, then its given that the sample also exhibits normality. The population distribution can be expressed as:

                                   X ~ N ( u , s /√n )

Where

                            s /√n = 1.3 / √49 = 0.2143

- The required probability is P ( 5 < X < 10 ) minutes. The standardized values are:

                        P ( 5 < X < 10 ) = P (    (5 - 8) / 0.2143 <  Z  <  (10-8) / 0.2143   )

                                                 = P ( -14.93 < Z < 8.4 )

- Using standard Z-table we have:

                        P ( 5 < X < 10 ) = P ( -14.93 < Z < 8.4 ) = 1        

7 0
3 years ago
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