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Elodia [21]
3 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]3 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:

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Find the slope given the points (2, −7) and (−1,<br> 6).
lesya [120]

Answer:

The Slope= -13/3

y-intercept= (0,5/3)

Step-by-step explanation:

m= change in y/change in x

m= y2-y1/x2-x1

m=6-(-7)/ -1-(2)

m=-13/3

4 0
3 years ago
Figure PQRS is rotated counterclockwise
sleet_krkn [62]
I gotchu fam, a rotation is occurring and we know this because it’s rotating 180°. Figures PQRS and P’Q’R’S’ are congruent because they are the same shape and size, just in different places.
4 0
3 years ago
PLEASE HELP IT WOULD BE VERY MUCH APPRECIATED! Last year, James earned £1,600 per month.
True [87]
Answer: £11.69

Explanation:

1) Work out 2% of £1600:
1600 x 2/100 =36

2) Add it on to the original number to get his new monthly pay:
1600 + 36 = £1636

3) Work out his yearly pay by:

a) finding the amount of months he worked:
46 / 4 = 11.5 months

b) Divide 11.5 into 2 bits and add them on:
1636 x 11 = 17997
1636 x 0.5 = 818

17997 + 818 = £18814

4) To get his pay per week:

18814 / 46 = £409

5) Finally, to get his pay per hour:

409 / 35 = 11.68671...
= £ 11.69
5 0
3 years ago
Read 2 more answers
9=x/6-1<br><br><br> what is x ?<br> sry I have to type more so this counts
Inga [223]
I think the answer is x=60
4 0
3 years ago
Sean, Ryan, and Justin shared a sum of money in the ratio 3 : 4 : 5. If Sean received $30, what was the sum of money shared?
Solnce55 [7]
In order to solve this problem, you need to find out how 3 of something  is 30
In this case, you multiply 10.
Sean= 3×10=30
Ryan= 4×10=40
Justin=  5×10= 50
30+40+50= 120
The answer is $120
Hope this helps
7 0
3 years ago
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