The answer would be 60 hope this helps
Answer:
Has to be the first one....
Step-by-step explanation:
5+7+8=20 which is the total number of balls that the bag contains
because out of the 20 balls only the 8 are blue, it is right to say that
8/20 = x/100 ⇒ x= (8·100)/20 ⇒ x= 800/20 ⇒ x=40
the blue balls are the 40%
Answer:
a
The correct option is B
b
The correct option is D
Step-by-step explanation:
From the question we are told that
The level of significance is 
The p-value is 
Considering question b
Given that the
then the null hypothesis is rejected
Considering question b
Given that the original claim is The standard deviation of pulse rates of a certain group of adult males is more than 11 bpm
Then the null hypothesis is 
The reason why the null hypothesis is write like this above is because a null hypothesis expression can not contain only a > or a < but only allows = 
and the alternative hypothesis is 
Now given that the null hypothesis is rejected, it mean that there is sufficient evidence to support original claim
On the first on it is the first answer and the last one.
second: the second and the third one.