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.

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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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Suppose you are a researcher and you are interested in determine the consumption behavior of all first year students at Mzumbe University. Due to limited resources you decide to select only 500 students to represent the entire group. Use the stratified sampling with probability proportional to size to identify the number of students from each programme that will be included in the sample. Assume that the total number of students in each degree programme is as indicated in the table below; Course Econ BAF HRM Education Computer No of students 500 800 1000 400 200 Source: Hypothetical data
ISBE14 9.C.040. You may need to use the appropriate appendix table or technology to answer this question. Last year, 45% of business owners gave a holiday gift to their employees. A survey of business owners conducted this year indicates that 30% plan to provide a holiday gift to their employees. Suppose the survey results are based on a sample of 80 business owners. (a) How many business owners in the survey plan to provide a holiday gift to their employees this year? business owners (b) Suppose the business owners in the sample did as they plan. Compute the p-value for a hypothesis test that can be used to determine if the proportion of business owners providing holiday gifts has decreased from last year. Find the value of the test statistic. (Round your answer to two decimal places.) Find the p-value. (Round your answer to four decimal places.) p-value = (c) Using a 0.05 level of significance, would you conclude that the proportion of business owners providing gifts decreased? O…
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
1. Determine if the following is: SURVEY,| EXPERIMENTATION, | OBSERVATION ______a. A student researcher aims to know the favored vaccine of top government officials. So, the researcher produced a list of questions and interviewed several officials regarding their vaccine of preference. Majority did not want to get vaccinated with a vaccine with a poor efficiency rate. _____b. A boy wants to discover the percentage of his followers in Twitter that have a high propensity for believing fake news. The boy started a group in Twitter and invited several of his acquaintances. She then posted fake news and documented the reactions. _____c. The U.S. President wishes to know the number of COVID-19 cases in the population if the quarantine limitations are modified. The president sets the following quarantine levels: ECQ, MECQ, GCQ. The authority then modified the quarantine level randomly every month while tracking the oscillations in the number of COVID-19 cases.
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. $
.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
a. A random sample of 150 approved mortgage applications is selected from a bank's database. Customers of this bank can choose either variable or interest-only mortgages. These mortgage choices have either a 20-year or 30-year term. The data are displayed i table below. Term Type of Mortgage 20-year Total 30-year 25 Variable 45 Interest Only 40 40 Total Use the table above to answer the questions below. i. If an approved application is selected at random, what is the probability that it is a 30-year term application? ii. If an approved application is randomly selected, what is the probability that the mortgage choice is variable and has a term of 20 years or is interest only and has a term of 20 years?
Determine whether the source given below has the potential to create a bias in a statistical study. Washington University obtained word counts from the most popular novels of the past five years. Choose the correct answer below. A. There does not appear to be a potential to create a bias. The organization is reputable and has many professional and credible members. B. There does appear to be a potential to create a bias. There is an incentive to make the results statistically insignificant. C. There does appear to be a potential to create a bias. There is an incentive to produce results that are in line with the organization's creed and that of its funders. D. There does not appear to be a potential to create a bias. The organization would not gain from putting a spin on the results.
12.EOC.56-E Undergraduate students at Miami University in Oxford, Ohio, were surveyed in order to evaluate the effect of gender and price on purchasing a pizza from Pizza Hut. Students were told to suppose that they were planning to have a large two-topping pizza delivered to their residence that evening. The students had to decide between ordering from Pizza Hut at a reduced price of $8.49 (the regular price for a large two-topping pizza from Oxford Pizza Hut at the time was $11.49) and ordering a pizza from a different pizzeria. The results from this question are summarized in the accompanying contingency table. Complete parts (a) through (d). GENDER Pizza Hut OtherFemale 4 12Male 8 16 a. Using a 0.05 level of significance, is there evidence of a difference between males and females in their pizzeria selection? b. What is your answer to (a) if twelve of the male students selected Pizza Hut and twelve selected…
A biologist is studying the plant diversity in 15 million acres of the Sierra Nevada Mountains. He will count the number of species in 150 acres. Match the strategies to their corresponding sampling techniques. _______ The biologist goes to 15 diverse locations that have 10 acres each and surveys all 10 acres for each of these 15 locations. _______ The biologist orders the 15 million acres by latitude and then surveys every 100000th acre on the list. _______ The biologist enters the 15 million acres into a data base and had a computer randomly select 150 of these acres. _______ The biologist goes to his 150 favorite hiking places and looks at an acres along each trail. _______ The biologist classifies the Sierras into 10 different ecological types and then makes sure that the proportion of each ecological type from the sample is the same as the proportion of that of the population. a. Stratified Sampling b. Simple Random Sampling c. Systematic Sampling d. Cluster Sampling e.…
2 A researcher recruits 80 students for a study. Half of the students attend a review session for an exam. The remaining students study as they normally would for the exam. After the exam, the researcher compares the scores of the two groups. Identify the control group. A: All the students in the study B: The students who attend the review session C: All the students who take the exam D: The students who study as they normally would
5. A cancer patient signs up for a process to test a medicine, but she does not know whether she actually gets the actual medicine or a placebo. Which type of research is she involved in? Group of answer choices An Observational Study An Anecdote A Designed Experiment A Retrospective Study

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