Question
In: Statistics and Probability
A survey found that 34% of 875 randomly sampled teens said that their parents checked to...
A survey found that 34% of 875 randomly sampled teens said that their parents checked to see what Web sites they visited. The following year the same question posed to 800 teens found 42% reporting such checks. Do these results provide evidence that more parents are checking?
need: null and alternative hypothesis, z value, p value, anything else that. might help
Solutions
orchestra answered 1 year agoRelated Solutions
A survey of 25 randomly sampled judges employed by the state of Florida found that they...
A survey of 25 randomly sampled judges employed by the state of
Florida found that they earned an average wage (including benefits)
of $59.00 per hour. The sample standard deviation was $6.05 per
hour. (Use t Distribution Table.)
What is the best estimate of the population mean?
Develop a 99% confidence interval for the population mean wage
(including benefits) for these employees. (Round your
answers to 2 decimal places.)
How large a sample is needed to assess the population mean...
A survey of 25 randomly sampled judges employed by the state of Florida found that they...
A survey of 25 randomly sampled judges employed by the state of
Florida found that they earned an average wage (including benefits)
of $67.00 per hour. The sample standard deviation was $5.75 per
hour.
What is the best estimate of the population mean?
Develop a 95% confidence interval for the population mean wage
(including benefits) for these employees. (Round your
answers to 2 decimal places.)
How large a sample is needed to assess the population mean with
an allowable error...
A survey of 20 randomly sampled judges employed by the state of Florida found that they...
A survey of 20
randomly sampled judges employed by the state of Florida found that
they earned an average wage (including benefits) of $63.00 per
hour. The sample standard deviation was $5.90 per hour. (Use
t Distribution Table.)
What is the best estimate of the population mean?
Develop a 98% confidence interval for the population mean wage
(including benefits) for these employees. (Round
your answers to 2 decimal places.)
Confidence interval
for the population mean wage is between and
How...
A survey of 24 randomly sampled judges employed by the state of Florida found that they...
A survey of 24
randomly sampled judges employed by the state of Florida found that
they earned an average wage (including benefits) of $57.00 per
hour. The sample standard deviation was $6.02 per hour. (Use
t Distribution Table.)
What is the best estimate of the population mean?
Develop a 98% confidence interval for the population mean wage
(including benefits) for these employees. (Round your
answers to 2 decimal places.)
3. a. A survey of 1000 U.S. adults found that 34% of people said that they...
3.
a. A survey of 1000 U.S. adults found that 34% of people said
that they would get no work done on Cyber Monday since they would
spend all day shopping online. Find the 90% confidence interval of
the true proportion. ROUND TO FIVE DECIMAL PLACES
b. In a recent year, 6% of cars sold had a manual transmission.
A random sample of college students who owned cars revealed the
following: out of 129 cars, 23 had manual transmissions. Estimate...
A survey of 1060 randomly selected US teens ages 13 to 17 found that 605 of...
A survey of 1060 randomly selected US teens ages 13 to 17 found
that 605 of them say they have made a new friend online.
Find and interpret a 90% confidence interval for the proportion
of US teens who have made a new friend online.
Fill in the blanks
a) The scenario above represents (write either
test or CI):
b) The population parameter (write either single
proportion or single mean):
c) The sample size:
d) The sample statistic (round decimal...
In a recent statistics survey, 37 out of 129 randomly sampled college students said they get...
In a recent statistics survey, 37 out of 129 randomly
sampled college students said they get enough sleep. Penn State
conducted a much larger scale study a few years ago and found that
40% of college students got enough sleep. Is the lower percentage
among college students in the recent study due to chance or is it
signifcantly lower than the Penn State study? Determine the alpha
level for this study.
In a city of 80,000 households, 800 were randomly sampled in a marketing survey by an...
In a city of 80,000 households, 800 were randomly sampled in a
marketing survey by an auto manufacturer. To see how typical this
city was, some statistics were collected: the average number of
cars per household was 1.32, while the standard deviation for the
number of cars per household was 0.8. Construct a 95% confidence
interval for the average number of cars per household in the whole
city.
A social media survey found that 67% of parents are "friends" with their children on a...
A social media survey found that 67% of parents are "friends"
with their children on a certain online networking site. A random
sample of 140 parents was selected. Complete parts a through d
below.
A social media survey found that 71% of parents are "friends" with their children on a...
A social media survey found that 71%
of parents are "friends" with their children on a certain
online networking site. A random sample of 140
parents was selected. Complete parts a through d below.
a. Calculate the standard error of the proportion.
sigma Subscript p
equals0.0383
(Round to four decimal places as needed.)
b. What is the probability that
105
or more parents from this sample are "friends" with their
children on this online networking site?
P(105
or more parents...
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