I need full explanation pls i will upvote Which of the following is the least robustelement in an experimental design toinvestigate a cause and effect linkbetween pollutant exposure and eczemain mice?Question 5 Select one:a. Theextent of eczema is observed by a visualscoreb.The hypothesis is that pollutantexposure causes eczemac.Theindependent variable is identified as thepollutantd.Mice are randomly allocatedinto exposed and unexposed groups

Option a: This option is correct because, this option involves subjectivity in assessing the extent…

Answered: Which of the following is the least…

Principles Of Marketing

17th Edition

ISBN:9780134492513

Author:Kotler, Philip, Armstrong, Gary (gary M.)

Publisher:Kotler, Philip, Armstrong, Gary (gary M.)

Chapter1: Marketing: Creating Customer Value And Engagement

Section: Chapter Questions

Problem 1.1DQ

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The number of daily new cases of COVID-19 in the USA increased after the holidays (Thanksgiving, Christmas, New Year, etc) as seen in the chart below. Following Shewhart's definition of "chance" and "assignable" causes of variability, should these increases in the daily new cases of COVID-19 be classified as: "chance" or "assignable" ? United States: What is the daily number of confirmed cases? Daily new confirmed COVID-19 cases Shown is the rolling 7-day average. The number of confirmed cases is lower than the number of actual cases; the main reason for that is limited testing. Christmas + Add country LINEAR LOG 250,000 Thanksgiving 200,000 New Year 150,000 100,000 United States 50.000 Mar 1, 2020 Apr 30, 2020 Aug 8, 2020 Nov 16, 2020 Mar 15, 2021 Source: Johns Hopkins University CSSE COVID-19 Data CC BY Jan 28, 2020 Mar 15, 2021 Assignable Chance
state the effect on planned evidence (increase or decrease) of changing each of 'AN INCREASE IN PLANNED DETECTION RISK' factor, while the other factors remain unchanged.
A certain soft drink bottler claims that more than 50% of its customers do not drink any other brand of soft drink. A random sample of 100 customers yielded 56 who do not drink any other brand of soft drink. Do these sample results support the bottler's claim? Use a 10% significance level. Round to three decimal places. What is the Test Statistic? I
A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only indepen- dent variable. Develop another model with weight as the independent variable. Which of these two models is better? Explain. MPG 44 44 40 37 37 34 35 32 30 28 26 26 25 22 20 21 18 18 16 16 4 HORSEPOWER 67 50 62 69 66 63 90 99 63 91 94 88 124 97 114 102 114 142 153 139 WEIGHT 1,844 1,998 1,752 1,980 1,797 2,199 2,404 2,611 3,236 2,606 2,580 2,507 2,922 2,434 3,248 2,812 3,382 3,197 4,380 4,036
Elon Corporation manufactures parts for an aircraft com-pany. It uses a computerized numerical controlled (CNC) machining center to produce a specific part that has adesign (nominal) target of 1.275 inches with tolerancesof 0.024 inch. The CNC process that manufacturesthese parts has a mean of 1.281 inches and a standarddeviation of 0.008 inch. Compute the process capabilityratio and process capability index, and comment onthe overall capability of the process to meet the designspecifications.
In 1986 a catastrophic nuclear accident in the Ukraniancity of Chernobyl exposed the surrounding area to largeamounts of radiation. Since then, scientists have beeninvestigating the aftereffects on plants, animals, andhumans. A 2007 study examined 841 barn swallowsthere, noting the incidence of deformed toes and beaks, abnormal tail feathers, deformed eyes, tumors, and albi-nism (a condition that involves discoloration of the birds’ plumage). Previous studies involving thousands of barn swallows in Spain, Italy, and Denmark had seen albi-nism in 4.35% of this species, yet 112 of the Chernobyl swallows displayed the condition.a) Is there evidence that the albinism rate is higheramong Chernobyl barn swallows? b) What does this study tell us about the effect of nu-clear contamination on barn swallows?
8. assignment variable at which the treatment status does NOT change In Regression Discontinuity framework, the cutoff is defined as the level of the True False 9. What regression equation do we use for regression discontinuity framework? a) Y = Bo + B1 T + B2Xu+ Ei b) Y = Bo + B,T+ B2C + ei c) Y, = Bo + B, T+ B2 (Xi-C) + ei d) Y, = Bo + B1T + B2 (Xu + C) + € 10. Regression Discontinuity Design accomplices apples-to-apples comparison by comparing individuals as far from the cutoff as possible. True False
An advertising executive claims that there is a difference in the mean household income for credit cardholders of Visa Gold and of MasterCard Gold. A random survey of 15 Visa Gold cardholders resulted in a mean household income of $⁢68,420 with a standard deviation of $⁢9100. A random survey of 6 MasterCard Gold cardholders resulted in a mean household income of $⁢59,200 with a standard deviation of $⁢9200. Is there enough evidence to support the executive's claim? Let μ1 be the true mean household income for Visa Gold cardholders and μ2 be the true mean household income for MasterCard Gold cardholders. Use a significance level of α=0.05 for the test. Assume that the population variances are not equal and that the two populations are normally distributed. Step 1 of 4: State the null and alternative hypotheses for the test. Step 2 of 4: Compute the value of the t test statistic. Round your answer to three decimal places. Step 3 of 4: Determine the decision rule for rejecting the…
Random variation is also known as common cause variation, a. FALSE bTRUE
Calculate the mean and standard deviation for the following distribution Class 1 2 5 6-10 10-20 20-30 30-50 50-70 70-100 f 3 4 10 23 20 20 15 3 2
Given two independent random samples with the following results: n1=441 x1=185 n2=560 x2=351 Can it be concluded that there is a difference between the two population proportions? Use a significance level of α=0.05 for the test. Step 1 of 6: State the null and alternative hypotheses for the test. Step 2 of 6: Find the values of the two sample proportions, p^1 and p^2. Round your answers to three decimal places. Step 3 of 6: Compute the weighted estimate of p,p‾. Round your answer to three decimal places. Step 4 of 6: Compute the value of the test statistic. Round your answer to two decimal places. Step 5 of 6: Determine the decision rule for rejecting the null hypothesis H0. Round the numerical portion of your answer to two decimal places. Reject H0 if ...... ...... ...... Step 6 of 6: Make the decision for the hypothesis test.
Discuss the key differences between common and assignable causes of variation. Give examples.

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