Question

1) Psychologists know that people find it easier to remember items at the beginning and at the end of a list of items. Suppose you think that level of education might make a difference to the tendency to remember items in the middle of the list. You randomly select two groups of subjects, with N = 10 in each group. Participants in Group 1 have 12 years of education, and members of group 2 have 20 years of education. Which test should you use to analyze the results?

Group of answer choices

- z test
- single sample t test
- independent samples t test
- dependent samples t test

2) Most sleeping pills reduce the period of REM sleep. You want to validate the claims of a new sleeping pill, which is advertised as not affecting REM sleep at all. You randomly select a single group of people, and for one week they receive a placebo, and then for another week they receive the recommended dosage of the new sleeping pill. REM sleep is monitored in a sleep lab and the total number of minutes spent in REM are counted for each person. The average amount of REM sleep for the placebo is then compared to the average amount of REM sleep for the sleeping pill. Which test should you use to analyze the data?

Group of answer choices

- z test
- single samples t test
- independent samples t test
- dependent samples t test

3) A t test comparing the means between two independent groups yields a p value of .02 (p = .02). What should you do about the null (H0) hypothesis?

Group of answer choices

- Reject H0
- Do not reject H0
- Accept H0

4) A test measuring variability between multiple groups yields a p value less than .05 (p < .05). What should you do about the null (H0) hypothesis?

Group of answer choices

- Reject H0
- Do not reject H0
- Accept H0

5) A t test comparing a person's score on a test before and after an intervention yields a p value of .08 (p = .08). What should you do about the null (H0) hypothesis?

Group of answer choices

- Reject H0
- Do not reject H0
- Accept H0

6)If the null (H0) hypothesis is true, then no difference exists between populations.

Group of answer choices

- True
- False

7) In an ANOVA, if there is no difference between the groups, then the F ratio will approximately equal _______.

Group of answer choices

- 0
- 1
- -1
- .05

8) Arnold compares the means of three groups and calculates a value of -2.01 for the F ratio. This necessarily implies that. . .

Group of answer choices

- the mean of the first group is the highest of the three groups
- the mean of the third group is the highest of the three groups
- the differences between the means are statistically significant
- he made an error is his calculation

9) The problem with conducting multiple t-tests instead of using a post-hoc test is that you increase the risk of Type 1 errors.

Group of answer choices

- True
- False

10) A researcher theorizes that Freshmen spend more time studying than Sophomores, who spend more time studying than Juniors, who spend more time studying than Seniors. In conducting a one-way ANOVA on this data, what is the most appropriate way to state the null (H0) hypothesis?

Group of answer choices

- all µs are different
- not all µs are different
- all µs are equal
- not all µs are equal

Answer #1

5) A t test comparing a person's score on a test before and
after an intervention yields a p value of .08 (p = .08). What
should you do about the null (H0) hypothesis? Group of answer
choices
a. Reject H0
b. Do not reject H0
c. Accept H0
6)If the null (H0) hypothesis is true, then no difference exists
between populations. Group of answer choices
True
False
7) In an ANOVA, if there is no difference between the groups,...

8) Arnold compares the means of three groups and calculates a
value of -2.01 for the F ratio. This necessarily implies that. .
Group of answer choices
a. the mean of the first group is the highest of the three
groups
b. the mean of the third group is the highest of the three
groups
c. the differences between the means are statistically
significant
d. he made an error is his calculation
9) The problem with conducting multiple t-tests instead...

REM (rapid eye movement) sleep is sleep during which most dreams
occur. Each night a person has both REM and non-REM sleep. However,
it is thought that children have more REM sleep than adults†.
Assume that REM sleep time is normally distributed for both
children and adults. A random sample of n1 = 9 children (9 years
old) showed that they had an average REM sleep time of x1 = 2.9
hours per night. From previous studies, it is known...

An independent-measures research study uses two samples, each
with n = 8 participants. If the data produce a t statistic of t =
2.50, then which of the following is the correct decision for a
two-tailed hypothesis test? Group of answer choices Reject the null
hypothesis with a = .05 but fail to reject with a = .01. cannot
answer without additional information Reject the null hypothesis
with either a = .05 or a = .01. Fail to reject the...

REM (rapid eye movement) sleep is sleep during which most dreams
occur. Each night a person has both REM and non-REM sleep. However,
it is thought that children have more REM sleep than adults†.
Assume that REM sleep time is normally distributed for both
children and adults. A random sample of n1 = 9
children (9 years old) showed that they had an average REM sleep
time of x1 = 2.9 hours per night. From previous
studies, it is known...

Question 1
In a sample of 75 female Facebook users in a certain group, 42
say that they are very active and make at least one post a day. A
researcher wants to test if the proportion of Facebook posting by
this group is different from the national percent of 45%. What
would be the null hypothesis for this test?
Group of answer choices
H0:p=0.45
H0:p<0.45
Ha:p>0.45
Question 2
In test of hypothesis, we either accept or reject the null...

If you have 1 group and know the population standard deviation,
which test statistic do you use? Question 20 options:
A) dependent samples T-test
B) 2 independent samples T-test
C) Z-test
D) single group T-test
2) The null hypothesis for the dependent t-test is essentially
the same as Question 14 options:
A) Null hypothesis for a Z-score hypothesis test
B) Null hypothesis for a 1 group t-test
C) Null hypothesis for a two independent groups t- test
D) The effect...

Question 1
The p-value of a test H0: μ= 20 against the
alternative Ha: μ >20, using a sample of
size 25 is found to be 0.3215.
What conclusion can be made about the test at 5% level of
significance?
Group of answer choices
Accept the null hypothesis and the test is insignificant.
Reject the null hypothesis and the test is insignificant.
Reject the null hypothesis and the test is significant
Question 2
As reported on the package of seeds,...

If we know the population standard deviation, we can use which
table to do a hypothesis test?
Group of answer choices
Z-table
T-table
Critical table
Significant table
In the critical value approach, to make a decision, we compare
the critical value with the:
Group of answer choices
Test statistic
p-value
Hypothesized value
Population parameter
In the critical value approach, if we are doing a two-tailed
test, we do not know the population standard deviation, and we find
that the test...

I need to know if this is right or left tailed and what
the P-Value is!
For the following, Use the five-step approach to hypothesis
testing found on page 8-16. It states. You can use excel to compute
the data or you can do it by hand. The YouTube videos provided in
the links will walk you through the steps to complete the following
problems.
State the hypothesis and identify the claim.
H0:
H1:
Find the critical value and determine...

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