There are students in Harry's class. The fraction of girls in Harry's class is 1/3.
Answer:
Z= 0.253
Z∝/2 = ± 1.96
Step-by-step explanation:
Formulate the null and alternative hypotheses as
H0 : u1= u2 against Ha : u1≠ u2 This is a two sided test
Here ∝= 0.005
For alpha by 2 for a two tailed test Z∝/2 = ± 1.96
Standard deviation = s= 15
n= 10
The test statistic used here is
Z = x- x`/ s/√n
Z= 2058- 2046 / 15 / √10
Z= 0.253
Since the calculated value of Z= 0.253 falls in the critical region we reject the null hypothesis.
There is evidence at the 0.05 level that the doors are too short and unusable.
Answer:
4/9
Step-by-step explanation:
3L /2 = 2/3 cross multiply expressions
9L = 4 divide both sides by 9
L = 4/9
The answer issss D
I hope this helped u :D
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I think the answer is B)</span>
