Question

It was reported that 63% of individual tax returns were filed electronically in 2012. A random sample of 325 tax returns from 2013 was selected. From this sample, 237 were filed electronically. Complete parts a through c below.

a. Construct a 95% confidence interval to estimate the actual proportion of taxpayers who filed electronically in 2013. A 95% confidence interval to estimate the actual proportion has a lower limit of nothing and an upper limit of nothing. (Round to three decimal places as needed.)

b. What is the margin of error for this sample? The margin of error is nothing. (Round to three decimal places as needed.)

c. Is there any evidence that this proportion has changed since 2012 based on this sample? Because the confidence interval found in part a ▼ does not include includes the reported proportion from 2012, this sample ▼ provides does not provide evidence that this proportion has changed since then.

Answer #1

It was reported that 64% of individual tax returns were filed
electronically in 2012. A random sample of 275 tax returns from
2013 was selected. From this sample, 178 were filed
electronically.
a. Construct a 90% confidence interval to estimate the actual
proportion of taxpayers who filed electronically in 2013. A 90%
confidence interval to estimate the actual proportion has a lower
limit of ______and an upper limit of ________. (Round to three
decimal places as needed.)

It was reported that 59 % of individual tax returns were filed
electronically in 2012. A random sample of 225 tax returns from
2013 was selected. From this sample, 142 were filed
electronically.
a) Construct a 90 % confidence interval to estimate the actual
proportion of taxpayers who filed electronically in 2013. A 90 %
confidence interval to estimate the actual proportion has a lower
limit of ______ and an upper limit of ________ . (Round to three
decimal places...

The IRS reported that 62% of individual tax returns were filed
electronically in 2008. A random sample of 225 tax returns from
2010 was selected. From this sample, 163 were filed electronically.
a) Construct a 95% confidence interval to estimate the actual
proportion of taxpayers who filed electronically in 2010. b) What
is the margin of error for this sample? c) Is there any evidence
that this proportion has changed since 2008 based on this
sample?
Please spell the steps...

A website reported that 29% of drivers 18 and older admitted to
texting while driving in 2009. In a random sample of 800 drivers 18
years and older drawn in 2010, 176 of the drivers said they texted
while driving. Complete parts a through c below.
a. Construct a 95% confidence interval to estimate the actual
proportion of people who texted while driving in 2010. A 95%
confidence interval to estimate the actual proportion has a lower
limit of nothing...

A website reported that
31%
of drivers 18 and older admitted to texting while driving in
2009. In a random sample of
400
drivers 18 years and older drawn in 2010,
92
of the drivers said they texted while driving. Complete parts a
through c below.
a. Construct a
90%
confidence interval to estimate the actual proportion of people
who texted while driving in 2010.A
90%
confidence interval to estimate the actual proportion has a
lower limit of
nothing
and...

According to a census? bureau,
13.513.5?%
of the population in a certain country changed addresses from
2008 to 2009. In? 2010,
3131
out of a random sample of
400400
citizens of this country said they changed addresses during the
previous year? (in 2009). Complete parts a through c below.
a. Construct a
9595?%
confidence interval to estimate the actual proportion of people
who changed addresses from 2009 to 2010.A
9595?%
confidence interval to estimate the actual proportion has a
lower...

An IRS report stated that 17% of all electronically filed income
tax returns for 2003 contained errors. H&R Block
suspects this percentage has changed. In a random sample
of 250 electronically filed income tax returns for 2003, 35 were
found to contain errors.
(a) What is the test statistic?
(b) Is there evidence to indicate that this proportion has
changed? if so,
a.
Yes, the p-value is greater than 0.05.
b.
No, the p-value is less than 0.05.
c.
Yes, the p-value...

A website reported that 28 % of drivers 18 and older admitted to
texting while driving in 2009. In a random sample of 400 drivers 18
years and older drawn in 2010, 109 of the drivers said they texted
while driving. Complete parts a through c below.
a. Construct a 90 % confidence interval to
estimate the actual proportion of people who texted while driving
in 2010.
A 90 % confidence interval to estimate the actual proportion has
a lower...

According to a census bureau, 11.5% of the population in a
certain country changed addresses from 2008 to 2009. In 2010, 26
out of a random sample of 400 citizens of this country said they
changed addresses during the previous year (in 2009). Complete
parts a through c below.
a. Construct a 95% confidence interval to estimate the actual
proportion of people who changed addresses from 2009 to 2010. A
95% confidence interval to estimate the actual proportion has a...

According to a census bureau,12.5% of the population in a
certain country changed addresses from 2008 to 2009. In 2010,14
out of a random sample of 200 citizens of this country said they
changed addresses during the previous year (in 2009). Complete
parts a through c below.
A)
Construct a
9999%
confidence interval to estimate the actual proportion of people
who changed addresses from 2009 to 2010.
A) 99% confidence interval to estimate the actual proportion
has a lower limit...

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