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Oliga [24]
3 years ago
6

For a normal distribution,

Mathematics
1 answer:
Anni [7]3 years ago
7 0

Answer:

1.282, -0.5244,...

Step-by-step explanation:

We know that Z is a standard normal variate with mean =0, and std dev =1

a) z-score separates the highest 10% from the rest of the scores

= 90th percentile = 1.282

b) z-score separates the lowest 30% from the rest of the scores

= 30th percentile = -0.5244

c) z-score separates the lowest 40% from the rest of the scores

= 40th percentile = -0.2533

d) z-score separates the lowest 20% from the rest of the score

=20th percentile = -0.8416

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6. Carla runs 3 miles in 30 minutes.
NARA [144]

Answer:

Carla ran 0.1 miles per minute.

Step-by-step explanation:

To solve this, we need to use the distance formula.

The formula is d=rt, where d is the distance traveled, r is the rate in which the distance is traveled, and t is the amount of time it took to go that distance. So lets plug it all in.

d=rt

3=(r)(30)

Now, we need to do the inverse of multiplying 30 to both sides, which would be the same as dividing by 30 on both sides.

3/30=(r)(30/30)

0.1=r

The rate is 0.1. Carla ran 0.1 miles per minute.

3 0
2 years ago
What is 500 divided by 20
Nikolay [14]
The answer is 25 just use a calculator for that type of math
5 0
3 years ago
Read 2 more answers
Of the range, the interquartile range, and the variance, the interquartile range is most influenced by an outlying value in the
amm1812

Answer:

Option B) False            

Step-by-step explanation:

We define the following terms:

Range:

It is the difference between the minimum and maximum value of data.

It is effected by presence of outliers.

Interquartile range:

It is the difference between the third quartile and the first quartile of data.

Variance:

\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n}  

where x_i are data points, \bar{x} is the mean and n is the number of observations.

It is a measure of spread of the data. It is effected by presence of outliers as they increase the variation in the data.

Thus, the given statement is false.

6 0
3 years ago
Marco sells and ships oranges from the trees in his orange grove for $1.25 per pound plus a shipping fee. One package has a ship
Marianna [84]

Answer:

Let x = the number of pounds of oranges in the packet.

The equation: 11.20 = 1.25x + 4.95

11.20 = 1.25x+4.95

6.25 = 1.25x

x = 5

There are 5 pounds of oranges in the packet.

Let me know if this helps!

5 0
3 years ago
Determine whether 25a^2 − 49b^6 is a difference of two squares. If so, factor it. If not, explain why.
-Dominant- [34]

Answer:

Step-by-step explanation:

it is

B

8 0
3 years ago
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