2.2. Indicate which test (paired samples (ie dependent) t-test,
independent two samples t-test, one-sample t-test, independent
samples z-test) is most appropriate for the following situations :
A. Comparison of weight gain of two groups of 18 cows where one
group was raised following standard practices and the other group
was raised following “organic” standards.
B. Comparison of scores on a fitness test of Olympic-class
distance runners (n=20) with the national average score of people
of a similar age range (22-31...
One-sample t-test
Independent samples t-test
Paired samples t-test
One-way ANOVA
Correlation
Simple linear regression
Chi-square test of independence/association
______ Statistical test used to compare means of a continuous
variable between >2 groups
______ Statistical test used to examine whether 2
categorical variables are independent
______ Statistical test used to compare a sample
mean to a population mean (when the
population standard
deviation is known)
______ Statistical test used to compare means of a
continuous variable between 2 groups ...
For the following scenarios, indicate which type of t-test
(either paired samples or independent samples) would be most
appropriate. (8 points; 2 points each)
Determining whether children remember more details from a
surprising event than college students.
Determining whether left-handed people show higher vocabulary
scores than right-handed people.
Determining whether rats show differences in their spatial
navigation abilities before and after consuming a high fat
meal.
Determining whether a group of people has faster running speeds
after drinking 1 cup...
For the following, indicate whether you should use a one sample
t-test, paired t-test, or two sample t-test and whether you have
chosen a one-sided or two-sided alternate hypothesis:
A) Do macroeconomics students at Vanderbilt score significantly
higher on the Math SAT than the national average?
My Answer: One sample t-test, one tailed
B) Do macroeconomics students at Vanderbilt score significantly
higher on the Verbal SAT than the national average?
My answer: One sample t-test, one tailed
C) Report a...
1. For the following experimental designs, indicate whether
independent-samples or paired-samples t-test is appropriate:
a) Weight is obtained for each subject
before and after Dr. Nogani's new treatment. The hypothesis to be
tested is that the treatment has no effect on weight loss.
b) Elephants are randomly selected
from a jungle and Trunkgrol is administered to one group of
elephants and Trunkgro2 to the other. The hypothesis to be tested
is that both agents are equally effective in promoting trunk...
1. Identify which test the scenario will use:
independent samples t test, paired samples t test, chi square test
for goodness of fit, chi square test for independence or chi square
test for homogeneity.
A. A researcher goes to the parking lot at a large grocery chain
and observes whether each person is male or female and whether they
return the cart to the correct spot before Chi leaving (yes or
no).
B. Amber Sanchez, a statistics student, collected data...
Indicate which test (dependent samples t-test, independent
samples t-test, independent samples z-test) is most appropriate for
the following situation:
i. Comparison of mean recycling participation between 9 large
cities and 11 small cities
ii. Comparison of the weights of 16 Toronto Maple Leaf rookies
at the beginning versus the end of the regular NHL season.
iii. Comparison of fin length of 35 male and 37 female brook
trout sampled in Spruce Lake, Nottingham Forest.
iv. Comparison of the mass of...
Determine the number of degrees of freedom for the two-sample
t test or CI in each of the following situations. (Round
your answers down to the nearest whole number.)
(a) m = 12, n = 10,
s1 = 5.0, s2 = 6.0
(b) m = 12, n = 18,
s1 = 5.0, s2 = 6.0
(c) m = 12, n = 18,
s1 = 3.0, s2 = 6.0
(d) m = 10, n = 24,
s1 = 5.0, s2 = 6.0
Determine the number of degrees of freedom for the two-sample t
test or CI in each of the following situations. (Round your answers
down to the nearest whole number.)
(a) m = 12, n = 10, s1 = 3.0, s2 = 6.0
(b) m = 12, n = 15, s1 = 3.0, s2 = 6.0
(c) m = 12, n = 15, s1 = 2.0, s2 = 6.0
(d) m = 10, n = 24, s1 = 3.0, s2 =...