Answer:
The hypothesis the statistician wants to test is
:
= 75 vs
:
> 75.
Step-by-step explanation:
We are given that a statistician wishing to test a hypothesis that students score at least 75% on the final exam in an introductory statistics course decides to randomly select 20 students in the class and have them take the exam early. The average score of the students on the exam was 78%.
Firstly, as we know that testing is always done on the population data.
<em>So, let </em>
<em> = average students score on the final exam in an introductory statistics course</em>
The hypothesis situation that the statistician wants to test is given by;
Null Hypothesis,
:
= 75 {means that the average students score on the final exam in an introductory statistics course is equal to 75%}
Alternate Hypothesis,
:
> 75 {means that the average students score on the final exam in an introductory statistics course is greater than 75%}
So, from the options given to us, the appropriate option is ;
Option (d) :
:
= 75 vs
:
> 75
I don't know if this is right but 0.125
Answer:
1/6
Step-by-step explanation:
We know this because we have to first add up all of the coins, bringing us to 18. Then, to make the fraction of the probability of selecting a penny at random, we'd simply do 3/18. This simplified would be 1/6
Answer:
There is a 3/5 chance of the first ball being white, and a 3/10 chance the second one is black.
Step-by-step explanation:
There are 5 balls, of which 3 are white, so you have a 3/5 chance of the first one being white. Then you have 2 white and 2 black balls. There is a 2/4 chance of picking a black ball. Multiply 3/5 and 2/4 to get 6/20, or 3/10 for choosing a white ball then a black ball.
The solutions of given equation are -3, -1 and 3.