Question

1) The procedure that involves selecting a sample of individuals to study such that each individual in the population has an equal chance of being selected is referred to as __________ sampling.?

2) A result of an analysis is considered statistically significant when a sample value is so extreme that

Group of answer choices

the research hypothesis is rejected.

the null hypothesis is accepted.

the null hypothesis is rejected.

the research hypothesis is accepted.

3) If a study is conducted using a significance level of 15%, there is a 15% chance of making a

Group of answer choices

Type II error.

computational error.

Type I error.

Type III error.

please help

Answer #1

"There is no difference in the weight between rats fed low-fiber
diets and rats fed high fiber diets," is an example of a(n):
Group of answer choices
null hypothesis
alternative hypothesis
directional hypothesis
nondirectional hypothesis
Which of the following is an example of a nondirectional
research hypothesis?
Group of answer choices
There is a positive relationship between a high-fat diet and
weight gain.
There is a negative relationship between a high-fat diet and
weight gain.
There is a relationship between...

Please show work/explain:
Based on a random sample of 25 units of product X, the average
weight is 102 lb and the sample standard deviation is 10 lb. We
would like to decide whether there is enough evidence to establish
that the average weight for the population of product X is greater
than 100 lb. Assume the population is normally distributed. Using
the critical value rule, at α = .01.
What is the critical value for this hypothesis test?
Group...

53
Exhibit 18-6
Forty-one individuals from a sample of 60 indicated they oppose
legalized abortion. We are interested in determining whether or not
there is a significant difference between the proportions of
opponents and proponents of legalized abortion.
Refer to Exhibit 18-6. The null hypothesis should be
Group of answer choices
rejected
not rejected
Not enough information is given to answer this question.
None of these alternatives.

State whether each of the following is True or
False.
a. A smaller sample could provide less sampling error than a larger
sample from a given population.
b. The correct critical value a lower tail hypothesis test when
sigma is unknown, the sample size = 15, and alpha = 0.05 is
-1.645.
c. A larger sample size can reduce the potential for extreme
sampling error.
d. It is impossible for the population mean to equal the mean of a
sample...

1.Carpetland carpet installers incur an average cost of $300 for
each carpet installed. Joan Chin, the firm’s vice president,
proposes a new procedure for installations, which she hopes will be
more efficient. Joan plans to run a trial and hopes that the
results of a trial period will enable her to conclude with a level
of significance of 0.05 that the new procedure reduces the average
cost to install a carpet.
If Joan's hypothesis test results in a Type I...

Identifying individuals with a high risk of Alzheimer’s disease
usually involves a long series of cognitive tests. However,
researchers have developed a 7-Minute Screen, which is a quick and
easy way to accomplish the same goal. The question is whether the
7-Minute Screen is as effective as the complete series of tests. To
address this question, Ijuin et al. (2008) administered both tests
to a group of patients and compared the results. The following data
represent results similar to those...

_____11) If the null hypothesis is that the population mean is
equal to 150 and a sample
mean of 113 gave significant support against the
null hypothesis, which of the
following sample means would be certain to give
support against the null
hypothesis.
a)
114
b.)
122
c.)
264
d.)
112
_____12) If the p-value is less than the significance level, you
would .
a.) reject
the null hypothesis
b.) accept...

In a study entitled “How Undergraduate Students Use Credit
Cards”, it was reported that a sample of 1000 undergraduate
students have a mean credit card balance of $3173. This figure was
an all-time high and had increased 44% over the previous five
years. Assume that a current study is being conducted to determine
if it can be concluded that the mean credit card balance for
undergraduate students has changed compared to the original report.
Based on previous studies, use a...

Four students reported their study time and test score from a
statistics course and their data have been converted into Z scores
in the table below. What is Pearson's correlation coefficient from
this data set?
Group of answer choices
a.)-.50
b.)-.25
c.).75
d.)-1.00
In what situation would a researcher use
a t-test used instead of a Z-test?
Group of answer choices
a.)When there is only one sample.
b.)When the population standard deviation is unknown.
c.)When the sample size is smaller than...

The following table shows the Myers-Briggs personality
preference and area of study for a random sample of 519 college
students. In the table, IN refers to introvert, intuitive; EN
refers to extrovert, intuitive; IS refers to introvert, sensing;
and ES refers to extrovert, sensing.
Myers-Briggs
Preference
Arts &
Science
Business
Allied
Health
Row
Total
IN
64
17
15
96
EN
87
43
24
154
IS
60
30
25
115
ES
70
39
45
154
Column
Total
281
129
109
519...

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