Answer:
We fail to reject the null hypothesis and accept it.
Step-by-step explanation:
We are given the following in the question:
Hypothesis:
Mean number of recorded participants
Calculated test statistic = 13.86
Critical value = -1.751
We are conducting a left tailed hypothesis.
Rejection region:
If the calculate test statistic is less than the critical value, we fail to accept the null hypothesis and reject it.
We accept the alternate hypothesis.
Since,
We fail to reject the null hypothesis and accept it. Thus, the test result are not statistically significant and and at best provide weak evidence against the null hypothesis.
Answer:
one second
Step-by-step explanation:
Using the hypergeometric distribution, it is found that there is a 0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.
The people are chosen without replacement from the sample, hence the <em>hypergeometric distribution </em>is used to solve this question.
<h3>What is the
hypergeometric distribution formula?</h3>
The formula is:
The parameters are:
- x is the number of successes.
- N is the size of the population.
- n is the size of the sample.
- k is the total number of desired outcomes.
In this problem:
- There is a total of 18 people, hence .
- 2 people will be chosen, hence .
- David and Valerie corresponds to 2 people, hence .
The probability that both get picked is P(X = 2), hence:
0.0065 = 0.65% probability that both David and Valerie get picked for the Tahitian dance lesson.
You can learn more about the hypergeometric distribution at brainly.com/question/25783392
Answer: C
Step-by-step explanation: Just try it
13 is 141. A octagon has 1080 degrees and if you add all the angles up you get 939 and 1080-930=141