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vredina [299]
3 years ago
8

Math emended. D d did dnend d d d d d dd

Mathematics
1 answer:
guajiro [1.7K]3 years ago
7 0

Answer:

huh?

Step-by-step explanation:

whats the questionnnnnnn

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You are testing the claim that the mean GPA of night students is different from the mea GPA of day students. You sample 20 night
svetlana [45]

Answer:

As the calculated value of z does not lie in the critical region the null hypothesis is accepted that the GPA mean of the night students is the same as the GPA mean of the day students.

Step-by-step explanation:

Here n= 20

Sample mean GPA = x`= 2.84

Standard mean GPA = u= 2.55

Standard deviation = s=  0.45.

Level of Significance.= ∝ = 0.01

The hypothesis are formulated as

H0: u1=u2   i.e the GPA of night students is same as the mean GPA of day students

against the claim

Ha: u1≠u2

i.e the GPA of night students is different from the mea GPA of day students

For two tailed test  the critical value is  z ≥ z∝/2= ± 2.58

The test statistic

Z= x`-u/s/√n

z= 2.84-2.55/0.45/√20

z= 0.1441

As the calculated value of z does not lie in the critical region the null hypothesis is accepted that the GPA mean of the night students is the same as the GPA mean of the day students.

8 0
3 years ago
Simplify −2(2h+10)+4h
Anuta_ua [19.1K]
First distribute: -4h - 20 + 4h
Combine like terms: -20
The answer is -20
7 0
3 years ago
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The preimeter of a rectangle is 50 inches. The width of the rectangle is 10 inches. What is the length of the rectangle?
Montano1993 [528]
Perimeter = 2(L + W)
2(L + 10) = 50
2L + 20 = 50
2L = 30, L = 15
Solution: the length is 15 inches
6 0
3 years ago
Ulet rolls 2 fair dice and adds the results from each. Work out the probability of getting a total of 7.
kiruha [24]

Answer:

7/ 36

Step-by-step explanation:

Roll of 2 fair six sided die :

Sample space = 6² = 36

Sum of 7:

(1,6) ; (6,1) ; (3,4) ; (4,3) ; (2,5) ; (5,2) = 6

Probability = required outcome / Total possible outcomes

Required outcome = 7

Total possible outcomes = 36

P(obtaining a sum of 7) = 7 / 36

4 0
3 years ago
Prove that segment AB is parallel to dc
Darina [25.2K]
Angle ABC = Angle DCG
7 0
3 years ago
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