Question
In: Statistics and Probability
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology to answer this question. The population proportion is 0.40. What is the probability that a sample proportion will be within ±0.04 of the population proportion for each of the following sample sizes? (Round your answers to 4 decimal places.) (a) n = 100 (b) n = 200 (c) n = 500 (d) n = 1,000 (e) What is the advantage of a larger sample size? We can guarantee p will be within ±0.04 of the population proportion p. There is a higher probability σp will be within ±0.04 of the population standard deviation. As sample size increases, E(p) approaches p. There is a higher probability p will be within ±0.04 of the population proportion p
Solutions
Expert Solution
(a)
(b)
(c)
(d)
(e)
There is a higher probability p will be within ±0.04 of the population proportion p
orchestra answered 1 year agoRelated Solutions
You may need to use the appropriate appendix table or technology to answer this question. In...
You may need to use the appropriate appendix table or technology
to answer this question. In the past, 19% of all homes with a
stay-at-home parent had the father as the stay-at-home parent. An
independent research firm has been charged with conducting a sample
survey to obtain more current information. (a) What sample size is
needed if the research firm's goal is to estimate the current
proportion of homes with a stay-at-home parent in which the father
is the stay-at-home...
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question.
The following results are for independent random samples taken
from two populations.
Sample 1
Sample 2
n1 = 20
n2 = 30
x1 = 22.9
x2 = 20.1
s1 = 2.6
s2 = 4.6
(a)
What is the point estimate of the difference between the two
population means? (Use
x1 − x2.
)
(b)
What is the degrees of freedom for the t distribution?
(Round...
You may need to use the appropriate appendix table or technology to answer this question. A...
You may need to use the appropriate appendix table or technology
to answer this question.
A report states that adults 18- to 24- years-old send and
receive 128 texts every day. Suppose we take a sample of 25- to 34-
year-olds to see if their mean number of daily texts differs from
the mean for 18- to 24- year-olds.
(a)
State the null and alternative hypotheses we should use to test
whether the population mean daily number of texts for...
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question.
The following results come from two independent random samples
taken of two populations.
Sample 1
Sample 2
n1 = 50
n2 = 35
x1 = 13.6
x2 = 11.6
σ1 = 2.5
σ2 = 3
Provide a 90% confidence interval for the difference between the
two population means. (Use x1 −
x2.Round your answers to two decimal
places.)
( ) to ( )
Provide a...
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question.
The increasing annual cost (including tuition, room, board,
books, and fees) to attend college has been widely discussed
(Time.com). The following random samples show the annual
cost of attending private and public colleges. Data are in
thousands of dollars.
Private Colleges
53.8
44.2
45.0
32.3
45.0
31.6
46.8
37.8
49.5
43.0
Public Colleges
20.3
22.0
28.2
15.6
24.1
28.5
22.8
25.8
18.5
25.6
14.4
21.8...
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question.
The following data are product weights for the same items
produced on two different production lines.
Line 1
Line 2
13.6
13.7
13.8
14.1
14.0
14.2
13.9
14.0
13.4
14.6
13.2
13.5
13.3
14.4
13.6
14.8
12.9
14.5
14.4
14.3
15.0
14.9
Test for a difference between the product weights for the two
lines. Use α = 0.05.
State the null and alternative hypotheses.
H0:...
You may need to use the appropriate appendix table or technology to answer this question. A...
You may need to use the appropriate appendix table or technology
to answer this question.
A research center has conducted extensive research on social
media usage. One finding was that 71% of adults aged 18 to 24 use
Snapchat. Another finding was that 48% of those aged 18 to 24 use
Twitter. Assume the sample size associated with both findings is
400.
(a)
Develop a 95% confidence interval for the proportion of adults
aged 18 to 24 who use Snapchat....
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question.
The following results come from two independent random samples
taken of two populations.
Sample 1
Sample 2
n1 = 50
n2 = 25
x1 = 13.6
x2 = 11.6
σ1 = 2.4
σ2 = 3
(a)
What is the point estimate of the difference between the two
population means? (Use
x1 − x2.)
(b)
Provide a 90% confidence interval for the difference between the
two...
You may need to use the appropriate appendix table or technology to answer this question. In...
You may need to use the appropriate appendix table or technology
to answer this question.
In 2017, a website reported that only 10% of surplus food is
being recovered in the food-service and restaurant sector, leaving
approximately 1.5 billion meals per year uneaten. Assume this is
the true population proportion and that you plan to take a sample
survey of 535 companies in the food service and restaurant sector
to further investigate their behavior.
(a)
Show the sampling distribution of...
You may need to use the appropriate appendix table or technology to answer this question. The...
You may need to use the appropriate appendix table or technology
to answer this question. The port of South Louisiana, located along
54 miles of the Mississippi River between New Orleans and Baton
Rouge, is the largest bulk cargo port in the world. The U.S. Army
Corps of Engineers reports that the port handles a mean of 4.5
million tons of cargo per week.† Assume that the number of tons of
cargo handled per week is normally distributed with a...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Write a program that copies the contents of one file to a destination file. This program...
- how to conduct a marketing mix for 3d crest white strips
- Is big data analytics used for service innovation at Amazon? If so, please write a brief...
- A shrink-fit process has been used to enhance the pressure carrying capacity of a cylinder. During...
- Ten-year zero coupon bonds issued by the U.S. Treasury have a face value of $1,000 and...
- The Blossom Department of Transportation has issued 25-year bonds that make semiannual coupon payments at a...
- Please answer all 4 parts of this question John Johnson just received a cash gift from...
ADVERTISEMENT