4. A man claims to be able to distinguish between two kinds of winewith 90% accuracy and presents his claim to an agency interested inpromoting the consumption of one of two kinds of wine. The followingexperiment is conducted to check his claim. The man is to taste thetwo types of wine and distinguish between them. This is to be donenine times with a 3-minute break after each taste. Assume that eachtasting is independent. It is agreed that if the man is correct at leastsix out of the nine times, he will be hired.(a) Assume that the man is guessing. What is the likelihood of theman being hired?(b) Assume now that the man's claim is true (i.e. that his probabilityof success in each tasting is 0.9). What is the chance of the manbeing hired?

Claim: Two kinds of wine can be distinguished with 90% accuracy.The man is interested in promoting…

Answered: 4. A man claims to be able to…

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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Q.5: Mr. Hamood, a research scholar of Business Department in HCT, would like to find out the association between the mid-term marks, quiz marks, assignment marks and end semester marks with the Total Marks/GP obtained by the students in the final exam. He has decided t collect the data from the college students studying in the Sultanate of Oman. He came to know that there are more than 138,000 students studying in all the different colleges in Oman and realized that it is not possible to collect the data from all the students considering the time to complete the study. a) How will you decide the sample size? Discuss with reasons b) Find out the dependent variable and independent variables e) Who are the respondents? d) How will you collect the data? Discuss the instrument and process e) Inferential statistics is applicable. Discuss analytically
A publisher of magazines for teenager's wishes to determine whether there is a relationship between the gender of a teenager and the type of the magazine that he/she prefer to read. A survey of 200 teenagers produced the following results: Gender Male Female Total Select one: a. 7.815 b. 5.991 Music 29 18 47 O c. 4.605 O d. 9.210 e. 3.841 Type of Magazine Clothes 32 25 57 Performing the Chi-squared test at a 10% level of significance to determine whether there is a relationship between the gender of the teenager and magazine preference, determine the critical value of the test. Gadgets 59 37 96 Total 120 80 200
Which of the following claims would result in a Left tail test? O A. Claim: The average heart rate for exercisers is lower than the average heart rate for nonexercisers. B. Claim The variation in the grades of the Final Exam are different than previously (which was 2.3). O C. Claim: The proportion of people with pets is over 75%. OD. Claim: The average age of voters in Clarke County is not 45 years.
For each scenario listed below, determine whether the scenario represents an Independent Samples or Dependent Samples (Matched Pairs) situation by placing the appropriate letter in the box provided. a. Comparing pre-test scores before training to post-test scores: OIndependent Samples OMatched Pairs b. Comparing the number of speeding tickets received by men to the number received by women: OIndependent Samples Matched Pairs c. Comparing pain levels of a group receiving a placebo to a group receiving a medicine: Independent Samples OMatched Pairs d. Comparing pain levels before and after treatment with magnetic therapy: Independent Samples OMatched Pairs
A depression study reports the following findings. There were no significant differences on depression symptoms across ethnic groups (Asian, latino, caucasian, African american ) or across treatment location.(home vs. clinic). Which of the following statements about the design is TRUE. 1. This would be considered a 2×2 ANOVA 2. There are 4 independent variables included here. 3. The ethnicity variable has 4 level and the treatment location variable has 2 levels. 4.There's a total of 4 separate group in this study.
Consider the following studies. Study I: A researcher randomly divided 200 high school students into two groups. The first group was told to not exercise. The second group was told to exercise at least 5 hours each week. At the end of two months, the heart rates of each participant in each group were measured at rest. It was found that the group that exercised 5 hours a week had a significantly lower average heart rate. Study II: A researcher gathered 200 high school students randomly, asked them how long they exercised each week, and then measured their heart rates at rest. It was found that students who exercised at least 5 hours a week had a significantly lower average heart rate. Part A: Which study was experimental? Why? Study IStudy II Part B: List the explanatory and response variables in the studies. Explanatory: heart rate; Response: exercise timeExplanatory: student; Response: amount of exerciseExplanatory: exercise time; Response: heart rate Part C: State whether the…
A researcher is investigating the effects of sleep deprivation by testing people in the morning when they are well rested and testing again after they have been awake for 36 hours. Which of the following research designs should be used? a. repeated-measures b. independent-measures
For each of the following epidemiological scenarios, draw a DAG that represents the relationships between the variables: A researcher is studying the association between experiencing childhood abuse (A) and the occurrence of depression (D) as an adult. She has reason to believe that alcohol consumption (C) may mediate the relationship between (A) and (D).
We discuss how to test for an association between two categorical variables in Section 6.8. A marine research team records the number of fish from 3 species that they find at different depth categories in the ocean. They are interested in assessing whether or not there is a relationship between the depth category (close to surface, mid-level, ocean floor) and the fish species found (species A, species B, species C). A two-way table showing the classification of a sample of 150 observations is given below. If the variables for the ocean depth category and the species are independent, how would you calculate the expected number of fish that are at the mid-level and from species C? Expected number =
A test is being designed to compare the wearing quality of two brands of tires, say brand A and brand B. Six automobiles will be selected and equipped with the new tires from both brands and driven under normal conditions for 1 month. A measurement will be taken to determine how much wear took place on a scale from 0 to 200. Below is a table of the paired data collected from the 6 cars in the test. [BrandA BrandB] 125 64 64 65 94 103 38 37 90 102 106 115 Conduct a hypothesis test to determine whether the mean of the difference population is 0 at a significance level of a =. State your conclusion.
What is the difference between an observational study and an experiment? Choose the correct answer below. O A. In an experiment, a treatment is applied to part of a population and responses are observed. In an observational study, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. O B. In an experiment, a researcher measures characteristics of interest of an entire population but does not change existing conditions. In an observational study, a treatment is applied to an entire population and responses are observed. O C. In an experiment, a treatment is applied to an entire population and responses are observed. In an observational study, a researcher measures characteristics of interest of an entire population but does not change existing conditions. O D. In an experiment, a researcher measures characteristics of interest of a part of a population but does not change existing conditions. In an observational study, a…

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