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Elodia [21]
2 years ago
10

A group of students are randomly placed in either a traditional AP Stat class or an online-only AP Stat class. Both classes take

the same tests. On the first test, the 250 students in the traditional class got an average of 77.5 and a standard deviation of 8.4. The 190 students in the online class scored an average of 79.8 with a standard deviation of 5.1. What is the test statistic for a test with hypotheses
Mathematics
1 answer:
BaLLatris [955]2 years ago
8 0

Answer:

Mean or Expected Value:

μ

=

∑

x

i

n

X

x

P

(

x

)

Standard Deviation:

σ

=

√

∑

x

i

n

X

(

x

−

μ

)

2

P

(

x

)

Step-by-step explanation:

You might be interested in
A facility has 150 beds and during a 30 day period they have 4,200 occupied bed days. What is their average percentage of occupa
natulia [17]

Answer:

Average percentage of occupancy = 93%.

Step-by-step explanation:

If a facility has 150 beds, then over a 30 day period they could have as many as 150 x 30 or 4,500 occupied beds.  Since over the given 30 day period they only had 4,200 occupied beds, we can find the average percentage of occupancy by dividing the actual number by the expected number and multiplying by 100:

\frac{actual}{expected} = \frac{4200}{4500} x 100 = 93%


3 0
3 years ago
Read 2 more answers
Please help me with math and thank you
o-na [289]

Answer:  864 square inches (choice A)

Work Shown:

area = length*width

area = 36*24

area = 864

3 0
2 years ago
4. Find the value of x in the right triangle below.<br> 60°
antiseptic1488 [7]

Answer:

  12

Step-by-step explanation:

It is worthwhile memorizing the ratios of legs in a 30°–60°–90° triangle. Shortest to longest, the ratios are ...

  1 : √3 : 2

Then the sides marked will have the ratio ...

  6 : x = 1 : 2 = 6 : 12

  x = 12

_____

You can also get there using trigonometry.

  cos(60°) = 6/x

  x = 60/cos(60° = 60/0.5

  x = 12

7 0
2 years ago
25. Willa purchases a vase for her kitchen
IgorC [24]

Answer:

7,7, and 7

Step-by-step explanation:

If she vase is cubical we know that all 3 dimensions are the same. This means that x^3 = 343. So we know the answer is the cube root of 343, which is 7

3 0
3 years ago
If a pen and a pencil cost 1.10$ but the pen cost is 1$ more than pencil​
Stella [2.4K]

Answer:

The pencil cost $0.05 and the pen cost $1.05.

Step-by-step explanation:

Let, the price of the pencil is $ .

Given that the pen costs a dollar more than the pencil,

So, the price of the pen=$+1.

Therefore, ++1=1.10

, 2+1=1.10

, 2=1.10–1

, 2=0.10

, =0.10/2

, =0.05

The pencil cost $0.05 and the pen cost $1.05.

4 0
2 years ago
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