Mathematics: A Practical Odyssey
8th Edition
ISBN: 9781305104174
Author: David B. Johnson, Thomas A. Mowry
Publisher: Cengage Learning
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Chapter 12.CR, Problem 9CR
To determine
To graph:
The region of solutions of the given system of linear inequalities.
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A population that is uniformly distributed between a=0and b=10 is given in sample sizes
50( ),
100( ),
250( ),
and
500( ).
Find the sample mean and the sample standard deviations for the given data. Compare your results to the average of means for a sample of size 10, and use the empirical rules to analyze the sampling error. For each sample, also find the standard error of the mean using formula given below.
Standard Error of the
Mean =sigma/Root
Complete the following table with the results from the sampling experiment.
(Round to four decimal places as needed.)
Sample Size
Average of 8 Sample Means
Standard Deviation of 8 Sample Means
Standard Error
50
100
250
500
survey of
5050
young professionals found that they spent an average of
$20.5620.56
when dining out, with a standard deviation of
$11.4111.41.
Can you conclude statistically that the population mean is greater than
$2323?
Use a 95% confidence interval.
Question content area bottom
Part 1
The 95% confidence interval is
left bracket nothing comma nothing right bracketenter your response here, enter your response here.
As
$2323
is
▼
of the confidence interval, we
▼
can
cannot
conclude that the population mean is greater than
$2323.
(Use ascending order. Round to four decimal places as needed.)
1.
vector projection.
Assume, ER1001 and you know the following:
||||=4, 7=-0.5.7.
For each of the following, explicitly compute the value.
འབ
(a)
(b)
(c)
(d)
answer.
Explicitly compute ||y7||. Explain your answer.
Explicitly compute the cosine similarity of and y. Explain your
Explicitly compute (x, y). Explain your answer.
Find the projection of onto y and the projection of onto .
Chapter 12 Solutions
Mathematics: A Practical Odyssey
Ch. 12.0 - In Exercises 1-8, graph the region of the...Ch. 12.0 - Prob. 2ECh. 12.0 - Prob. 3ECh. 12.0 - In Exercises 1-8, graph the region of the...Ch. 12.0 - Prob. 5ECh. 12.0 - Prob. 6ECh. 12.0 - In Exercises 1-8, graph the region of the...Ch. 12.0 - Prob. 8ECh. 12.0 - Prob. 9ECh. 12.0 - Prob. 10E
Ch. 12.0 - Prob. 11ECh. 12.0 - Prob. 12ECh. 12.0 - Prob. 13ECh. 12.0 - Prob. 14ECh. 12.0 - Prob. 15ECh. 12.0 - Prob. 16ECh. 12.0 - Prob. 17ECh. 12.0 - Prob. 18ECh. 12.0 - Prob. 19ECh. 12.0 - Prob. 20ECh. 12.0 - Prob. 21ECh. 12.0 - Prob. 22ECh. 12.0 - Prob. 23ECh. 12.0 - Prob. 24ECh. 12.0 - Prob. 25ECh. 12.0 - Prob. 26ECh. 12.0 - Prob. 27ECh. 12.0 - Prob. 28ECh. 12.0 - Prob. 29ECh. 12.0 - Prob. 30ECh. 12.0 - Prob. 31ECh. 12.0 - Prob. 32ECh. 12.0 - Prob. 33ECh. 12.0 - Prob. 34ECh. 12.0 - Prob. 35ECh. 12.0 - Prob. 36ECh. 12.0 - Prob. 37ECh. 12.0 - Prob. 38ECh. 12.0 - Prob. 39ECh. 12.0 - Prob. 40ECh. 12.0 - Prob. 41ECh. 12.0 - Prob. 42ECh. 12.0 - Prob. 43ECh. 12.0 - Prob. 44ECh. 12.0 - Prob. 45ECh. 12.0 - Prob. 46ECh. 12.0 - In Exercises 3749. use a graphing calculator to...Ch. 12.0 - Prob. 48ECh. 12.0 - Prob. 49ECh. 12.1 - In Exercises 1-6, convert the information into a...Ch. 12.1 - Prob. 2ECh. 12.1 - In Exercises 1-6, convert the information into a...Ch. 12.1 - Prob. 4ECh. 12.1 - In Exercises 1-6, convert the information into a...Ch. 12.1 - Prob. 6ECh. 12.1 - In Exercises 7-16, use the method of linear...Ch. 12.1 - In Exercises 7-16, use the method of linear...Ch. 12.1 - In Exercises 7-16, use the method of linear...Ch. 12.1 - In Exercises 7-16, use the method of linear...Ch. 12.1 - Prob. 11ECh. 12.1 - Notel Chips manufactures computer chips. Its two...Ch. 12.1 - Global Air Lines has contracted with a tour group...Ch. 12.1 - Compucraft sells personal computers and printers...Ch. 12.1 - The Appliance Barn has 2,400 cubic feet of storage...Ch. 12.1 - City Electronics Distributors handles two lines of...Ch. 12.1 - Prob. 17ECh. 12.1 - Prob. 18ECh. 12.1 - How much of her available time would be unused if...Ch. 12.1 - Prob. 20ECh. 12.1 - Prob. 21ECh. 12.1 - In Exercises 21-24, the region of possible...Ch. 12.1 - Prob. 23ECh. 12.1 - In Exercises 21-24, the region of possible...Ch. 12.1 - Prob. 25ECh. 12.1 - Is it possible for an unbounded region to have...Ch. 12.1 - Prob. 27ECh. 12.1 - In Example 2, Petes Coffees mixes Colombian beans...Ch. 12.1 - Prob. 29ECh. 12.1 - Prob. 30ECh. 12.1 - Prob. 31ECh. 12.1 - Prob. 32ECh. 12.1 - Prob. 33ECh. 12.1 - Prob. 34ECh. 12.1 - Prob. 35ECh. 12.1 - What was surprising about the awarding of a Nobel...Ch. 12.1 - Prob. 37ECh. 12.1 - Answer the following questions using complete...Ch. 12.1 - Prob. 39ECh. 12.1 - Prob. 40ECh. 12.CR - Prob. 1CRCh. 12.CR - Prob. 2CRCh. 12.CR - Prob. 3CRCh. 12.CR - Prob. 4CRCh. 12.CR - Prob. 5CRCh. 12.CR - Prob. 6CRCh. 12.CR - Prob. 7CRCh. 12.CR - Prob. 8CRCh. 12.CR - Prob. 9CRCh. 12.CR - Prob. 10CRCh. 12.CR - Prob. 11CRCh. 12.CR - Prob. 12CRCh. 12.CR - Prob. 13CRCh. 12.CR - In Exercises 11-17, solve the given linear...Ch. 12.CR - The Mowson Audio Co. makes stereo speaker...Ch. 12.CR - The Stereo Guys store sells two lines of personal...Ch. 12.CR - Prob. 17CRCh. 12.CR - Prob. 18CRCh. 12.CR - Answer the following questions using your own...
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- A survey of 250250 young professionals found that two dash thirdstwo-thirds of them use their cell phones primarily for e-mail. Can you conclude statistically that the population proportion who use cell phones primarily for e-mail is less than 0.720.72? Use a 95% confidence interval. Question content area bottom Part 1 The 95% confidence interval is left bracket nothing comma nothing right bracket0.60820.6082, 0.72510.7251. As 0.720.72 is within the limits of the confidence interval, we cannot conclude that the population proportion is less than 0.720.72. (Use ascending order. Round to four decimal places as needed.)arrow_forwardThe numbered disks shown are placed in a box and one disk is selected at random. Find the probability of selecting a 4, given that a green disk is selected. Find the probability of selecting a 4, given that a green disk is selected. (Type an integer or a simplified fraction.) green blue green green green blue green bluearrow_forwardPls help ASAParrow_forward
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- I need help with this problem and an explanation of the solution for the image described below. (Statistics: Engineering Probabilities)arrow_forwardA survey of 250 young professionals found that two-thirds of them use their cell phones primarily for e-mail. Can you conclude statistically that the population proportion who use cell phones primarily for e-mail is less than 0.72? Use a 95% confidence interval. Question content area bottom Part 1 The 95% confidence interval is [ ], [ ] As 0.72 is ▼ above the upper limit within the limits below the lower limit of the confidence interval, we ▼ can cannot conclude that the population proportion is less than 0.72. (Use ascending order. Round to four decimal places as needed.)arrow_forward2. Answer the following questions using vectors u and v. --0-0-0 = find the the cosine similarity and the angle between u and v. འརྒྱ (a) (b) find the scalar projection of u onto v. (c) find the projection of u onto v. (d) (e) (f) find the scalar projection of onto u. find the projection of u onto u. find the projection of u onto and the projection of onto . (Hint: find the inner product and verify the orthogonality)arrow_forward
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