A local company is concerned about the number of daysmissed by its employees due to illness. A random sampleof 10 employees is selected. The number of days absentin one year is listed below. An incentive program isoffered in an attempt to decrease the number of daysabsent. The number of days absent in one year after theincentive program is listed below.EmployeeA BC DEFGHIJDays AbsentBefore the2 0 13 2 6 14 7 4 8 8IncentiveDays AbsentAfter the|4 6 22 4 0 0 9 0 6IncentiveFind the mean difference ud3.1 For the values in the last question, conduct anappropriate statistical test to test the claim that theincentive program was successful in decreasing thenumber of days absent.You need to include:Null and Alternative hypotheses.A test statisticeither a p-value or a critical value of the test statistic.A decision and a conclusion in the context of the claim.

Answered: Image /qna-images/answer/10f03e60-f7fb-4a4a-8e08-23ef267b28e4.jpg

Answered: A local company is concerned about the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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A market research firm is investigating the appeal of three package designs. The table below gives information obtained through a sample of 200 consumers. The three package designs are labeled A, B, and C. The consumers are classified according to age and package design preference. Under 25 years 25 or older Total A 0.76 B 0.38 0.33 D 0.22 E 0.39 A Last saved 2:13:37 PM 22 54 76 B 34 28 If one of these consumers is randomly selected, what is the probability that the person prefers design A? 62 C 40 22 62 Total 96 104 200
An experiment was performed to attempt to answer the question of interest posed in Question 12. In the experiment, 48 Israeli college students were randomly assigned to eat in groups of six. Before ordering, half of the groups were told they would each be responsible for individual meal costs and the other half were told that the cost would be split equally among the six people at the table. The cost of meals per person was recorded. Summary statistics are given below: Payment Type Split Individual Bill Sample 24 24 size Sample $37.29 $50.92 mean Sample $12.54 $14.33 st. dev. Suppose a 95% confidence interval for usplit - Hindividual is constructed. What is the value of the best estimate of the difference in population means? (Subtract "split bill" – “pay - individually".) Report your answer to two decimal places. $
Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a blood specimen is typed, the presence of the A and/or B antigen is indicated by listing the letter A and/or the letter B. If neither the A nor the B antigen is present, the letter O is used.The following table gives the percent of a country's population having each of the eight possible blood types in the sample space. Note that the presence or absence of the Rh antigen is indicated by the symbols + or −, respectively. Blood Types A+ A− B+ B− AB+ AB− O+ O− Percent 35.7 6.1 8.5 1.5 3.4 0.8 37.4 6.6 (a) What is the probability that a person selected at random from the population has a blood type that is type AB given that the person is Rh+? (Round your answer to two decimal places.)(b) What is the probability that a person selected at random from the population has a blood type that is Rh− given that the person is type O? (Round your answer to two decimal places.)
In a US presidential election, the incumbent president wins with 51.5% of the vote to 48.2% for the primary challenger (and .3% to others). In a nationwide telephone poll of 1000 people conducted exactly one week before the election by a university polling group, 49% of people polled supported the incumbent president, 50% supported the challenger, and 1% supported other candidates. a. For the polling study, what was the population of interest? b. What was the sample? c. Why did the sample results differ from the population? d. What are two constants that might have limited the generalizability of the polling results?
.A particular industrial product is shipped in lots of 50. Testing to determine whether an item is defective is costly; hence, the manufacturer samples production rather than using a 100% inspection plan. A sampling plan constructed to minimize the number of defectives shipped to customers calls for sampling five items from each lot and rejecting the lot if more than one defective is observed. (If the lot is rejected, each item in the lot is then tested.) If a lot contains four defectives, what is the probability that it will be accepted? * 0.855 O 0.755 0.655 0.955
3. The director of library services at Fairmont College did a survey of types of books (by subject) in the circulation library. Then she used library records to take a random sample of 4217 books checked out last term and classified the books in the sample by subject. The results are shown below. Subject Area % Books in Circ Library on this Subject No. of Books in the Sample on this Subject Business 32% 1210 Humanities 25% 956 Natural Science 20% 940 Social Science 15% 814 Other Subject 8% 297 Using a 5% level of significance, test the claim that the subject distribution of books in the library fits the distribution of books checked out by students.
A survey of 200 randomly selected college students was conducted to determine if the campus library should extend its hours of operation. The results of the survey are in the table. Closing Time Preference Close at 8 p.m. Close at 10 p.m. Close at midnight Year in College Freshmen Sophomores 25 15 20 15 5 25 Juniors 10 25 15 Seniors 25 15 5 If there are 4,000 students at the college, what is the best estimate for the number of students who prefer the library to close at 10 p.m.? O 1,000 students 1 200 students Next ▸ US 9:48 < Previous % A O DELL & ★ ME
Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a blood specimen is typed, the presence of the A and/or B antigen is indicated by listing the letter A and/or the letter B. If neither the A nor the B antigen is present, the letter O is used. The following table gives the percent of a country's population having each of the eight possible blood types in the sample space. Note that the presence or absence of the Rh antigen is indicated by the symbols + or -, respectively. 0 Blood Types Percent A+ A 6.3 35.7 B+ B 8.5 1.5 AB+ AB 3.4 0.8 0+ 37.2 (a) What is the probability that a person selected at random from the population has a blood type that is type A given that the person is Rh? (Round your answer to two decimal places.) 6.6 (b) What is the probability that a person selected at random from the population has a blood type that is Rh* given that the person is type B? (Round your answer to two decimal places.)
The management of Discount Furniture, a chain of discount furniture stores in the Northeast, designed an incentive plan for salespeople. To evaluate this innovative plan, 12 salespeople were selected at random, and their weekly incomes before and after the plan were recorded. Salesperson Before After Sid Mahone $ 320 $ 340 Carol Quick 290 285 Tom Jackson 421 475 Andy Jones 510 510 Jean Sloan 210 210 Jack Walker 402 500 Peg Mancuso 625 631 Anita Loma 560 560 John Cuso 360 365 Carl Utz 431 431 A. S. Kushner 506 525 Fern Lawton 505 619 Hint: For the calculations, assume the "Before" data as the first sample. Click here for the Excel Data File State the decision rule for 0.05 significance level: H0: μd ≥ 0 and H1: μd < 0. (Negative values should…
Human blood is classified by the presence or absence of three main antigens (A, B, and Rh). When a blood specimen is typed, the presence of the A and/or B antigen is indicated by listing the letter A and/or the letter B. If neither the A nor the B antigen is present, the letter O is used.The following table gives the percent of a country's population having each of the eight possible blood types in the sample space. Note that the presence or absence of the Rh antigen is indicated by the symbols + or −, respectively. Blood Types A+ A− B+ B− AB+ AB− O+ O− Percent 35.7 6.1 9.5 1.5 3.4 0.8 37.4 5.6 (a) What is the probability that a person selected at random from the population has a blood type that is type A given that the person is Rh−? (Round your answer to two decimal places.)(b) What is the probability that a person selected at random from the population has a blood type that is Rh+ given that the person is type B? (Round your answer to two decimal places.)
The Easy Credit Company reports the following table representing a breakdown of costumers according to the amount the owe and whether a cash advance has been made. An auditor randomly selects one of the accounts. Amounts owed by the customers Cash Advance? Yes No $0 - $199.99 245 2890 $200 - $399.99 380 1700 $400 - $599.99 500 1425 $600 - $799.99 415 940 $800 - $999.99 260 480 $1000 or more 290 475 Total customers 2090 7910 a.Given that a customer received a cash advance, what is the probability that the customer owed $1000 or more?

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