When samples are dependent, regardless of the sample size we
have to use the t-student test statistic with d.f. = n - 1. Suppose
we want to compare the premium prices of Progressive Insurance and
State Farm Insurance. We want to find out which one is cheaper.
Let's suppose we ask 20 people to call Progressive and State Farm
to figure out their premiums for the same coverage. The same 20
people call Progressive and State Farm. So, their 20...
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...
Assignment 4: T test for Dependent samples
Directions
Conduct a T test for Dependent Samples to answer the questions
based on the following scenario. (Assume a nondirectional research
hypothesis (two-tailed test) and a level of significance of
.05)
Scenario
To further examine the school performance scores of the
district, the superintendent identified schools within the district
that could be matched to schools from surrounding districts using a
series of demographic characteristics such as size, socio-economic
status, and percent special education...
Assignment #4: T test for Dependent Samples
Directions: Conduct a T test for Dependent Samples to answer the
questions based on the following scenario. (Assume a nondirectional
research hypothesis (two-tailed test) and a level of significance
of .05)
To further examine the school performance scores of the
district, the superintendent identified schools within the district
that could be matched to schools from surrounding districts using a
series of demographic characteristics such as size, socio-economic
status, and percent special education students....
True or false?
a) The larger sample size, the narrower confidence interval is
obtained.
b) Correlation coefficient does have same units as explanatory
variable.
c) The normal curve is symmetric and double-peaked.
d) An explanatory variable is always scaled on the x-axis.
e) Graph that displays association between two variables is
called a stemplot.
f) If two-sided test has to be used, the alternative hypothesis
must have a form of typical inequality.
g) In comparing two population means (or proportions),...
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...
1) Design a study that uses a dependent samples
design
2) Design a study that uses an independent
samples design. Be sure to make clear your independent and
dependent variables.
Base your two studies on the same general idea.
1) Design a study that uses a dependent samples
design
2) Design a study that uses an independent
samples design.
Base your two studies on the same general idea.
1) Design a study that uses a dependent samples
design
2) Design a study that uses an independent
samples design. Be sure to make clear your independent and
dependent variables.
Base your two studies on the same general idea.