Question
In: Statistics and Probability
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29 use tablets than the proportion of people age 30 and older. The table below details the number of tablet owners for each age group. Test at the 1% level of significance. (For subscripts let 1 = 16-29 year old users, and 2 = 30 years old and older users.)
| 16–29 year olds | 30 years old and older | |
|---|---|---|
| Own a Tablet | 69 | 231 |
| Sample Size | 620 | 2,302 |
State the null and alternative hypothesis:
In words, state what your random variable P'1 − P'2 represents:
State the distribution to use for the test. (Round your answers to four decimal places.)
What is the test statistic?
What is the p-value? what does it mean
Sketch a picture of this situation
Indicate the correct decision
Explain how you determined which distribution to use.
Solutions
orchestra answered 1 year agoRelated Solutions
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher
proportion of people ages 16 to 29 use tablets than the proportion
of people age 30 and older. The table below details the number of
tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year
olds
30 years old and
older
Own a Tablet
69
231
Sample Size...
Two computer users were discussing tablet computers. A higher proportion of people ages 16 to 29...
Two computer users were discussing tablet computers. A higher
proportion of people ages 16 to 29 use tablets than the proportion
of people age 30 and older. The table below details the number of
tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year
olds
30 years old and
older
Own a
Tablet
69
231
Sample
Size...
16) Two computer users were discussing tablet computers. A higher proportion of people ages 16 to...
16) Two computer users were discussing tablet computers.
A higher proportion of people ages 16 to 29 use tablets than the
proportion of people age 30 and older. The table below details the
number of tablet owners for each age group. Test at the 1% level of
significance. (For subscripts let 1 = 16-29 year old users, and 2 =
30 years old and older users.)
16–29 year olds
30 years old and older
Own a Tablet
69
231
Sample...
A computer company shipped two new computers to a customer. These two computers were randomly selected...
A computer company shipped two new computers to a customer.
These two computers were randomly selected from the 15 computers in
stock. Unfortunately, the inventory clerk by mistake mixed up new
computers with refurbished computers. As a result, the 15 computers
in stock consisted of 11 new computers and 4 refurbished computers.
If the customer received one refurbished computer, the company will
incur a shipping and handling expense of $100 to replace that
computer with a new computer. However, if...
a random sample of n1= 156 people ages 16 to 19 were taken from the island...
a
random sample of n1= 156 people ages 16 to 19 were taken from the
island of oahu, hawaii, and 16 were found to be high school
dropouts. Another random sample of n2=129 people ages 16 to 19 werr
taken from sweetwater county, Wyoming, and 10 were found to be high
school dropouts. Do these data indicate that the population
proportion of high school dropouts on Oahu is different ( either
way) from that of sweetwater county? use a 1%...
A report stated that 29% of the people in a representative sample of adult Americans ages...
A report stated that 29% of the people in a representative
sample of adult Americans ages 33 to 49 rated a landline telephone
among the three most important services that they purchase for
their home. In a representative sample of adult Americans ages 50
to 68, 44% rated a landline telephone as one of the top three
services they purchase for their home. Suppose that the samples
were independently selected and that the sample size was 590 for
the 33...
Suppose that in the certain country the proportion of people with red hair is 29%. Find...
Suppose that in the certain country the proportion of people
with red hair is 29%. Find the following probabilities if 37 people
are randomly selected from the populattion of this country. Round
all probabilities to four decimals.
(a) The probability that exactly 6 of the people have red
hair
(b) The probability that at least 6 of the people have red
hair
(c) Out of the sample of 37 people, it would be unusual to have
more than people with...
A computer manufacturer produces three types of computers: laptop, desktop, and tablet The manufacturer has designed...
A computer manufacturer produces three types of computers:
laptop, desktop, and tablet The manufacturer has designed their
supply chain in such a way so that the final assembly of their
computers entails putting together different quantities of the same
parts. We will assume that the costs for parts unique to the model
have already been accounted for in the reported per-unit profits,
and that inventory levels for these other parts do not change the
optimal allocation. We assume that there...
Random samples of people ages 15−24 and of people ages 25−34 were asked about their preferred...
Random samples of people ages 15−24 and of people ages 25−34
were asked about their preferred method of (remote) communication
with friends. The respondents were asked to select one of the
methods from the following list: cell phone, instant message,
e-mail, other.
Preferred
Communication Method
Age
Cell
Phone
Instant
Message
Email
Other
Row
Total
15-24
47
45
3
5
100
25-34
43
28
16
13
100
Column
Total
90
73
19
18
200
(i) Make a cluster bar graph showing...
About 90% of young adult Internet users (ages 18 to 29) use social-networking sites. (a) Suppose...
About 90% of young adult Internet users (ages 18 to 29) use
social-networking sites.
(a) Suppose a sample survey contacts an SRS of 1400 young adult
Internet users and calculates the proportion pˆp^ in this sample
who use social-networking sites.
What is the approximate distribution of pˆp^?
μpˆμp^ (±±0.00001) = , σpˆσp^ (±±0.00001) =
What is the probability that pˆp^ is between 87% and 93%? This
is the probability that pˆp^ estimates pp within 3%.
(Use software.)
P(0.87<pˆ<0.93)P(0.87<p^<0.93) (±±0.0001) =...
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