Question
In: Statistics and Probability
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time. Suppose that a recent sample of 1,000 adults showed 460 indicating that their financial security was more than fair. Suppose that just a year before, a sample of 850 adults showed 340 indicating that their financial security was more than fair.
(a) State the hypotheses that can be used to test for a significant difference between the population proportions for the two years.
(b) Conduct the hypothesis test and compute the p-value. At a 0.05 level of significance, what is your conclusion?
(c) What is the 95% confidence interval estimate of the difference between the two population proportions? What is your conclusion?
Solutions
orchestra answered 1 year agoRelated Solutions
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age
18 and older to determine if personal financial fitness is changing
over time. Suppose that in February 2012, a sample of 1,000 adults
showed 410 indicating that their financial security was more than
fair. In February 2010, a sample of 700 adults showed 245
indicating that their financial security was more than fair.
1.Conduct the hypothesis test and compute the p-value.
At a 0.05 level of significance, what is your...
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age
18 and older to determine if personal financial fitness is changing
over time. Suppose that in February 2012, a sample of 1,000 adults
showed 410 indicating that their financial security was more than
fair. In February 2010, a sample of 1,100 adults showed 385
indicating that their financial security was more than fair.
(a)
State the hypotheses that can be used to test for a significant
difference between the population...
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age
18 and older to determine if personal financial fitness is changing
over time. A recent sample of 1,000 adults showed 410 indicating
that their financial security was more than fair. Suppose that just
a year before, a sample of 1,100 adults showed 385 indicating that
their financial security was more than fair.
(a)
State the hypotheses that can be used to test for a significant
difference between the population proportions...
A certain financial services company uses surveys of adults age 18 and older to determine if...
A certain financial services company uses surveys of adults age
18 and older to determine if personal financial fitness is changing
over time. A recent sample of 1,000 adults showed 410 indicating
that their financial security was more than fair. Suppose that just
a year before, a sample of 800 adults showed 280 indicating that
their financial security was more than fair.
(a)
State the hypotheses that can be used to test for a significant
difference between the population proportions...
Country Financial, a financial services company, uses surveys of adults age 18 and older to determine...
Country Financial, a financial services company, uses surveys of
adults age 18 and older to determine if personal financial fitness
is changing over time (USA Today, April 4, 2012). In
February of 2012, a sample of 1000 adults showed 410 indicating
that their financial security was more than fair. In February of
2010, a sample of 900 adults showed 315 indicating that
their financial security was more than fair.
What is a 95% confidence interval estimate of the difference
between the...
Country Financial, a financial services company, uses surveys of adults age 18 and older to determine...
Country Financial, a financial services company, uses surveys of
adults age 18 and older to determine if personal financial fitness
is changing over time (USA Today, April 4, 2012). In
February of 2012, a sample of 1000 adults showed 410 indicating
that their financial security was more than fair. In February of
2010, a sample of 900 adults showed 315 indicating that
their financial security was more than fair.
What is the point estimate of the difference between the
proportions at...
Country Financial, a financial services company, uses surveys of adults age 18 and older to determine...
Country Financial, a financial services company, uses surveys of
adults age 18 and older to determine if personal financial fitness
is changing over time (USA Today, April 4, 2012). In February of
2012, a sample of 1000 adults showed 410 indicating that their
financial security was more than fair. In February of 2010, a
sample of 900 adults showed 315 indicating that their financial
security was more than fair. At 99% confidence, what is the margin
of error? Round to...
In a recent survey conducted, a random sample of adults 18 years of age or older...
In a recent survey conducted, a random sample of adults 18
years of age or older living in a certain country were asked their
reaction to the word socialism. In addition, the individuals were
asked to disclose which political party they most associate with.
Results of the survey are given in the table. Complete parts (a)
through (c) below.
_
Democrats
Independents
Republicans
Positive
216
64
158
Negative
270
370
411
(a) Does the evidence suggest individuals within each political...
a survey of 2284 adults in a certain large country aged 18 and older conducted by...
a survey of 2284 adults in a certain large country aged 18 and
older conducted by reputable polling organization founded that 424
have donated blood in the past two years. Complete Parts (a)
through (C).
a) obtain a point estimate for the population proportion of adults
in the country age 18 and older who have donated blood in the past
two years.
b) verify that the requirements for constructing a confidence
interval.
the sample [ a) can be assumed to...
In a recent Gallup poll, 507 adults age 18 and older were surveyed and 269 said...
In a recent Gallup poll, 507 adults age 18 and older were
surveyed and 269 said they believed they would not have enough
money to live comfortably in retirement. Use a 0.01 significance
level to test the claim that the proportion of adults who do not
believe they will have enough money to live comfortably in
retirement is smaller than 60%.
The test statistic is:
[ Select ]
...
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