William H. Knapp III

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1. What function calculates probability mass.
abline
binom.test
dbinom
pbinom
plot
points
qbinom
rbinom

2. What function calculates cumulative probability mass.
abline
binom.test
dbinom
pbinom
plot
points
qbinom
rbinom

3. What function outputs a graph.
abline
binom.test
dbinom
pbinom
plot
points
qbinom
rbinom

4. Imagine you observed 3 successes and 4 failures in a set of statistical experiments. What formula or function should you use to calculate the probability of observing that event? According to the null hypothesis, p(success)=1/3.
(1/3)^3*(2/3)^4
rbinom(3,7,1/3)
dbinom(3,7,1/3)
pbinom(3,7,1/3)
binom.test(3,7,1/3)

5. What is the probability for the above question. Run the code in R and copy/paste the answer. Don't include the [1]. I just want the number.

6. Imagine you observed 3 successes and 4 failures in a set of statistical experiments. What formula or function should you use to calculate the probability of observing any event like the one you observed? According to the null hypothesis, p(success)=1/3.
(1/3)^3*(2/3)^4
rbinom(3,7,1/3)
dbinom(3,7,1/3)
pbinom(3,7,1/3)
binom.test(3,7,1/3)

7. What is the probability for the above question. Run the code in R and copy/paste the answer. Don't include the [1]. I just want the number.

8. Imagine you observed 3 successes and 4 failures in a set of statistical experiments. What formula or function should you use to calculate the probability of observing any event in which there are three or fewer successes? According to the null hypothesis, p(success)=1/3.
(1/3)^3*(2/3)^4
rbinom(3,7,1/3)
dbinom(3,7,1/3)
pbinom(3,7,1/3)
binom.test(3,7,1/3)

9. What is the probability for the above question. Run the code in R and copy/paste the answer. Don't include the [1]. I just want the number.

10. Imagine you observed 3 successes and 4 failures in a set of statistical experiments. What formula or function should you use to calculate the probability of observing any event as or more extreme than what you observed? According to the null hypothesis, p(success)=1/3.
(1/3)^3*(2/3)^4
rbinom(3,7,1/3)
dbinom(3,7,1/3)
pbinom(3,7,1/3)
binom.test(3,7,1/3)

11. What is the probability for the above question. Run the code in R and copy/paste the answer. Don't include the [1]. I just want the number.

12. A friend claims that they are psychic. What is the null hypothesis?
They are psychic.
They are not psychic.
Not enough information to tell.

13. You're going to test their claims by having them guess the outcomes of a coin flip. Given the null hypothesis, what is the probability of success?
0
.25
.5
.75
1
Not enough information to tell.

14. You're pretty skeptical and want to have even stronger evidence than psychologists normally require before you would conclude they are psychic. What alpha do you use?
0
.01
.05
.1
1

15. You flip the coin and mark down whether or not they are correct 100 times. Assuming the null was correct, how many successes would occur in the most probable type of event?
0
25
50
75
100

16. What parameter(s) will you need to calculate the binomial test? Choose all that apply.
alpha
number of flips
number of successes
p(success)
p-value

17. What descriptive statistic(s) will you need to calculate the binomial test? Choose all that apply.
alpha
number of flips
number of successes
p(success)
p-value

18. What inferential statistic(s) will the binomial test calculate? Choose all that apply.
alpha
number of flips
number of successes
p(success)
p-value

19. Imagine that you observed 36 successes? What do you do? Pick the best answer.
Accept the alternative hypothesis.
Accept the null hypothesis.
Fail to reject the alternative hypothesis.
Fail to reject the null hypothesis.
Reject the alternative hypothesis.
Reject the null hypothesis.

20. Imagine that you observed 63 successes? What do you do? Pick the best answer.
Accept the alternative hypothesis.
Accept the null hypothesis.
Fail to reject the alternative hypothesis.
Fail to reject the null hypothesis.
Reject the alternative hypothesis.
Reject the null hypothesis.