Question
In: Statistics and Probability
2)A study was conducted to determine if the salaries of librarians from two neighboring cities were...
2)A study was conducted to determine if the salaries of librarians from two neighboring cities were equal. A sample of 15 librarians from each city was randomly selected. The mean from the first city was $28,900 with a standard deviation of $2300. The mean from the second city was $30,300 with a standard deviation of $2100.Construct a 95% confidence interval for μ1-μ2.
A) Hypothises :
B) Critical value (t-critical) :
C) Test statistic t-stat and the decision about the test statistic: (reject or fail to reject Ho)
D) Conclusion that results from the decision about Ho :
Solutions
orchestra answered 1 year agoRelated Solutions
2)A study was conducted to determine if the salaries of librarians from two neighboring cities were...
2)A study was conducted to determine if the salaries of
librarians from two neighboring cities were equal. A sample of 15
librarians from each city was randomly selected. The mean from the
first city was $28,900 with a standard deviation of $2300. The mean
from the second city was $30,300 with a standard deviation of
$2100.Construct a 95% confidence interval for μ1-μ2.
A) Hypothises :
B) Critical value (t-critical) :
C) Test statistic t-stat and the decision about the test...
A study was conducted to determine if the salaries of librarians from two neighboring cities were...
A study was conducted to determine if the salaries of librarians
from two neighboring cities were equal. A sample of 15 librarians
from each city was randomly selected. The mean from the first city
was $28,900 with a standard deviation of $2300. The mean from the
second city was $30,300 with a standard deviation of $2100.
Construct a 95% confidence interval for mu 1 - mu 2.
A study was conducted to determine if the salaries of librarians from two neighboring states were...
A study was conducted to determine if the salaries of librarians
from two neighboring states were equal. A sample of 100 librarians
from each state was randomly selected. The mean from the first
state was $29,100 with a standard deviation of $2,200. The mean
from the second state was $31,900 with a standard deviation of
$2,150. Test the hypothesis that there is no difference in the
salaries from both states at the 0.1 significance level.
determine the test statistic. Round...
2)A study was conducted by a local city council to determine if the salaries of librarians...
2)A study was conducted by a local city council to determine if
the salaries of librarians from two neighboring cities were equal.
A
sampleof15librariansfromeachcitywasrandomlyselected.Themeanfromthefirstcitywas$28,900witha
standarddeviationof$2300.Themeanfromthesecondcitywas$30,300withastandarddeviationof$2100.
Analysis the data using a hypothesis test and advise the council of
your findings.Use=0.05
.a)Hypothesis:
b)Critical value (tcritical):
c)Test statistic(tstat)and the decision about the test
statistic:(reject or fail to reject Ho):
d)Conclusion that results from the decision about Ho:
A study was conducted to determine if the salaries of elementary school teachers from two neighboring...
A study was conducted to determine if the salaries of elementary
school teachers from two neighboring districts were equal. A sample
of 15 teachers from each district was randomly selected. The mean
from the first district was $28,900 with a standard deviation of
$2300. The mean from the second district was $30,300 with a
standard deviation of $2100. Assume the samples are random,
independent, and come from populations that are normally
distributed. Construct a 95% confidence interval for μ1 -...
A study was conducted by a local city council to determine if the salaries of librarians...
A study was conducted by a local city council to determine if
the salaries of librarians from two neighboring cities were equal.
A sample of 15 librarians from each city was randomly selected. The
mean from the first city was $28,900 with a standard deviation of
$2300. The mean from the second city was $30,300 with a standard
deviation of $2100. Analysis the data using a hypothesis test and
advise the council of your findings. Use a=0.05 .
a) Hypothesis...
A study is conducted to compare salaries of managers of a certain industry employed in two...
A study is conducted to compare salaries of managers of a
certain industry employed
in two areas of the country, the eastern and northern regions.
Independent ran
dom samples of 300 plant managers are selected for each of the
two regions. These
managers were asked for their annual salaries. The results
showed an average salary
x1 = $102300 and standard deviation s1 = $5700
for the eastern region and an average
salary x2 = $98500 and standard deviation s2 =...
2) A study was conducted to determine whether there were significant differences between medical students admitted...
2) A study was conducted to determine whether there were
significant differences between medical students admitted through
special programs (such as retention incentive and guaranteed
placement programs) and medical students admitted through the
regular admissions criteria. It was found that the graduation rate
was 89.7% for the medical students admitted through special
programs. Be sure to enter at least 4 digits of accuracy for this
problem!
If 9 of the students from the special programs are randomly
selected, find the...
A study was conducted to determine the effects of two factors on the latherability of soap....
A study was conducted to determine the effects of two factors on
the latherability of soap. The two factors were type of water (tap
or distilled) and glycerol (present or absent). The outcome
measured was the amount of foam produced (in milliliters). The
experiment was repeated three times for each combination of the
factors. The results are as follows.
No Glycerol
Glycerol
Distilled Water
165 181 168
170 197 190
Tap Water
155 142 139
139 160 160
Analyze the...
A study was conducted to determine the effects of two factors on the latherability of soap....
A study was conducted to determine the effects of two factors on
the latherability of soap. The two factors were type of water (tap
or distilled) and glycerol (present or absent). The outcome
measured was the amount of foam produced (in milliliters). The
experiment was repeated three times for each combination of the
factors. The results are as follows.
No Glycerol
Glycerol
Distilled Water
165 181 168
170 197 190
Tap Water
155 142 139
139 160 160
Analyze the...
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