PSYC 355 EXAM 1 NEWEST 2026 | PSYC
355 PREP EXAM 1 | 200 QUESTIONS AND
VERIFIED ANSWERS RATED A+ | NEW
AND REVISED
A researcher is using a repeated-measures study to evaluate the
difference between two treatments. If the difference between the
treatments is consistent from one participant to another, then the data
should produce ______. - ANSWER- a small variance fro the difference
scores and a small standard error
For which of the following situations would a repeated-measures
research design be appropriate? - ANSWER- comparing pain tolerance
with and without acupuncture needles.
If other factors are held constant, which of the following sets of data
would produce the largest value for an independent-measures t statistic?
- ANSWER- the two samples both have n=30 with sample variances of
20 and 25
,If other factors are held constant, the larger the difference between the
two sample means, the greater the likelihood that the independent-
measures t test will find a significant difference. - ANSWER- T
A sample of n = 9 college students is used to evaluate the effectiveness
of a new Study Skills Workshop. Each student's grade point average
(GPA) is recorded for the semester before the workshop and for the
semester after the workshop. The average GPA improved by MD = 0.60
points with s2 = 0.09. The researcher would like to use the sample to
estimate how much effect the workshop would have for the entire
college population. Which of the following is the 80% confidence
interval for these data? - ANSWER- µD = 0.60 + 0.10(1.397)
A research study compares the mean weight for a sample of n = 36
participants before they begin a 6-week diet and their mean weight at the
end of the diet. This is an example of an independent-measures design. -
ANSWER- F
,One sample has n = 5 scores and the second has n = 10 scores. If the
pooled variance for the two samples is 30, what is the value of the
estimated standard error for the sample mean difference? - ANSWER- 3
A repeated-measures research study comparing two treatments with a set
of 10 scores in each treatment will produce a t statistic with df = 18. -
ANSWER- f
A researcher reports df = 18 for a repeated-measures t statistic. This
research study used a total of n = 19 participants. - ANSWER- T
An independent-measures research study uses a total of 18 participants
to compare two treatment conditions. If the results are used to construct
a 90% confidence interval for the population mean difference, then the t
values will be ±1.746. - ANSWER- T
Which of the following confidence intervals also indicates a significant
difference between treatments with α = .05? - ANSWER- estimate that
u1-u2 is in an interval between 2 and 10 with a 95% confidence level
, A repeated-measures test usually is more likely to detect a real treatment
effect than an independent-measures test because the repeated-measures
design typically has a smaller variance and a smaller estimated standard
error. - ANSWER- T
A repeated-measures study and matched-subjects study both produce t
statistics with df = 20. The repeated-measures study used more
participants than the matched-subjects study. - ANSWER- F
The following data were obtained from a repeated-measures research
study. What is the value of SSfor the difference scores?
SUBJECT - - 1st - - 2nd#1 - - - - - 10 - - 11#2- - - - - 4 - - 6#3 - - - - - 7 -
- 9#4- - - - - 6 - - - 5 - ANSWER- 6
Which of the following research situations would be most likely to use
an independent-measures design? - ANSWER- NOT Compare the
blood-pressure readings before medication and after medication for a
group of patients with high blood pressure.
One sample of n = 8 scores has a variance of s2 = 6 and a second sample
of n = 8 scores has a variance of s2 = 10. If the pooled variance is
355 PREP EXAM 1 | 200 QUESTIONS AND
VERIFIED ANSWERS RATED A+ | NEW
AND REVISED
A researcher is using a repeated-measures study to evaluate the
difference between two treatments. If the difference between the
treatments is consistent from one participant to another, then the data
should produce ______. - ANSWER- a small variance fro the difference
scores and a small standard error
For which of the following situations would a repeated-measures
research design be appropriate? - ANSWER- comparing pain tolerance
with and without acupuncture needles.
If other factors are held constant, which of the following sets of data
would produce the largest value for an independent-measures t statistic?
- ANSWER- the two samples both have n=30 with sample variances of
20 and 25
,If other factors are held constant, the larger the difference between the
two sample means, the greater the likelihood that the independent-
measures t test will find a significant difference. - ANSWER- T
A sample of n = 9 college students is used to evaluate the effectiveness
of a new Study Skills Workshop. Each student's grade point average
(GPA) is recorded for the semester before the workshop and for the
semester after the workshop. The average GPA improved by MD = 0.60
points with s2 = 0.09. The researcher would like to use the sample to
estimate how much effect the workshop would have for the entire
college population. Which of the following is the 80% confidence
interval for these data? - ANSWER- µD = 0.60 + 0.10(1.397)
A research study compares the mean weight for a sample of n = 36
participants before they begin a 6-week diet and their mean weight at the
end of the diet. This is an example of an independent-measures design. -
ANSWER- F
,One sample has n = 5 scores and the second has n = 10 scores. If the
pooled variance for the two samples is 30, what is the value of the
estimated standard error for the sample mean difference? - ANSWER- 3
A repeated-measures research study comparing two treatments with a set
of 10 scores in each treatment will produce a t statistic with df = 18. -
ANSWER- f
A researcher reports df = 18 for a repeated-measures t statistic. This
research study used a total of n = 19 participants. - ANSWER- T
An independent-measures research study uses a total of 18 participants
to compare two treatment conditions. If the results are used to construct
a 90% confidence interval for the population mean difference, then the t
values will be ±1.746. - ANSWER- T
Which of the following confidence intervals also indicates a significant
difference between treatments with α = .05? - ANSWER- estimate that
u1-u2 is in an interval between 2 and 10 with a 95% confidence level
, A repeated-measures test usually is more likely to detect a real treatment
effect than an independent-measures test because the repeated-measures
design typically has a smaller variance and a smaller estimated standard
error. - ANSWER- T
A repeated-measures study and matched-subjects study both produce t
statistics with df = 20. The repeated-measures study used more
participants than the matched-subjects study. - ANSWER- F
The following data were obtained from a repeated-measures research
study. What is the value of SSfor the difference scores?
SUBJECT - - 1st - - 2nd#1 - - - - - 10 - - 11#2- - - - - 4 - - 6#3 - - - - - 7 -
- 9#4- - - - - 6 - - - 5 - ANSWER- 6
Which of the following research situations would be most likely to use
an independent-measures design? - ANSWER- NOT Compare the
blood-pressure readings before medication and after medication for a
group of patients with high blood pressure.
One sample of n = 8 scores has a variance of s2 = 6 and a second sample
of n = 8 scores has a variance of s2 = 10. If the pooled variance is
