Question

. A researcher wants to investigate whether there is any difference in the average number of hours worked by post-secondary students who are at least second-generation Canadians and those who are new immigrants. Seven college students who are secondgeneration Canadians (Group A), and five students who are new immigrants (Group B), were examined, and the average number of hours worked during summer months were recorded and are given below: Group A 36 38 36 29 32 34 37 Group B 30 39 31 35 33 Since it was not clear whether the assumptions for a t-test were valid, the researcher decided to employ non-parametric methods. Use the Wilcoxon rank sum test to determine whether the average number of hours worked by Group A is significantly different from those of Group B. Use a = 0.05.

Answer #1

1. A researcher wants to investigate whether or
not a significant relationship exists between the number of wins
the softball team has and the number of wins the baseball team has.
What should they use?
A. Range
B. Chi-Square
C. Correlation
D. T-test
2. A researcher wants to find out which campus
organization has the most student members. What should they
use?
A. Range
B. Chi-Square
C. Mode
D. Correlation
3. A researcher wants to see if a 5-minute
exercise routine, a 15-minute exercise routine, or...

A. A researcher wants to know whether identical twins differ in
their self-confidence. Specifically, she wants to know whether the
twin that was born first benefits from being "the older" twin.
Which type of t-test would be most appropriate for comparing the
average self-confidence of older twins to the younger twins?
B. Kruger and Dunning (1999) published a paper called "Unskilled
and Unaware of It", in which they examined the hypothesis that
people who perform badly on tasks are unaware...

A researcher is trying to determine whether there is a
difference in the number of new friends that students make during
their freshman year based on whether they live on or off campus.
The descriptive statistics for the two groups are presented below.
Conduct the appropriate hypothesis test to determine whether there
is a significant difference in the number of new friends made.
On-Campus Freshmen
Off-Campus Freshmen
X1 = 4.48 s1 =1.81 N1 =16
X2 =3.61 s2 =1.86 N2 =16...

A researcher is trying to determine whether there is a
difference in the number of new friends that students make during
their freshman year based on whether they live on or off campus.
The descriptive statistics for the two groups are presented below.
Conduct the appropriate hypothesis test to determine whether there
is a significant difference in the number of new friends made.
On-Campus Freshmen
Off-Campus Freshmen
X1 = 4.48 s1 =1.81 N1 =16
X2 =3.61 s2 =1.86 N2 =16...

A researcher wants to study whether students who live in
dormitories are significantly more involved in campus life than
students who commute to campus? A sample of 171 students who live
in dormitories spend on average 10.5 hours per week to
extracurricular activities with standard deviation of 1.9 hours. A
sample of 161 students who commute to campus spend on average 12.4
hours per week to extracurricular activities with a standard
deviation of 2.4. At 90% level, is the difference
between...

A medical researcher wants to determine if the average hospital
stay of patients that undergo a certain procedure is greater than
9.1 days. The hypotheses for this scenario are as follows: Null
Hypothesis: μ ≤ 9.1, Alternative Hypothesis: μ > 9.1. If the
researcher takes a random sample of patients and calculates a
p-value of 0.2003 based on the data, what is the appropriate
conclusion? Conclude at the 5% level of significance.
Question 5 options:
1)
The true average hospital...

36. A researcher wants to examine if there is a correlation
between number of work hours per week and academic performance in a
sample of n = 150 undergraduate students. What will be the null
hypothesis, if she plans to use a two-tailed Person’s
correlation test in data analysis?
A. There is a significant correlation between number of work
hours per week and academic performance in the population of
undergraduate students.
B. There is a significant positive correlation between number...

4. A researcher is
interested whether number of arrests vary across cities. Two random
samples were collected. In city 1, the researcher sampled 185
individuals who had an average of 7.3 arrests with a standard
deviation of 2.3 arrests. In city 2, the researcher sampled 160
individuals who had an average of 8.2 arrests with a standard
deviation of 2.4 arrests. Test the null hypothesis that the number
of arrests does not vary across cities. In so doing, identify: (1)...

A researcher is interested whether number of arrests vary across
cities. Two random samples were collected. In
city 1, the researcher sampled 185 individuals who had an average
of 7.3 arrests with a standard deviation of 2.3
arrests. In city 2, the researcher sampled 160
individuals who had an average of 8.2 arrests with a standard
deviation of 2.4 arrests. Test the null hypothesis that
the number of arrests does not vary across cities. In so
doing, identify: (1) the research and null hypothesis, (2)...

A researcher wants to
determine whether high school students who attend an SAT
preparation course score significantly different on the SAT than
students who do not attend the preparation course. For those who do
not attend the course, the population mean is 1050 (? = 1050). The
16 students who attend the preparation course average 1150 on the
SAT, with a sample standard deviation of 300. On the basis of these
data, can the researcher conclude that the preparation course...

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