(ii)Construct 98% confidence interval for thetrue average time it takes to do the job. The efficiency expert at a computer companytested 40 engineers to estimate the averagetime it takes to assemble a certain computercomponent, getting a mean of 12.73 minutesand S.D of 2.06 minutes.

Given,sample size(n)=40sample mean(x¯)=12.73standard deviation(s)=2.06degrees of…

Answered: The efficiency expert at a computer…

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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HelloFresh and Blue Apron, both meal-kit providers, mail pre-measured ingredients and recipes to its customers so families can enjoy a home-cooked meal without the hassle of planning. The FDA wants to know if the average amount of time between when the meal leaves the packing facility and the time of the delivery of the box to the customer’s doorstep is different between HelloFresh and Blue Apron. Why is this information important for FDA (and customers) to know? How would you collect this data?
The manager of a big corporation finds out that on average, 40% of sick days are logged on Mondays and Fridays. There enough evidence to believe that employees are taking long weekends because Mondays and Friday constitute percent of the work week.
The number of pair days off taken by eight employees at a local small business is compared to the national average. You are hired by the business owner, who has been in business for just 18 months, to help her determine what to expect for paid days off. In general, she wants to set some standard for her employees and for herself. Let's assume your search on the internet for data on paid days off leaves you with the impression that the national average is 15 days. The data for the eight local employees during the last fiscal year are: 10, 11, 8, 14, 13, 12, 12, and 27 days. 1. Calculate the appropriate t statistic. 2. Draw a statistical conclusion. 3. Calculate and interpret the effect size.
C8. The GSS 2014 included a series of questions about what it takes to be a good citizen. Respondents were asked, to be a good citizen, how important was it "to help people in America who are worse off than yourself" (HELPUSA) and “to help people in the rest of the world who are worse off than yourself" (HELPWRLD). Answers were measured on a 7-point scale: 1 = not important at all to 7 = very important. We ran ANOVA models for each with respondent's political party (RPartyId) as the independent variable. Set alpha at .05 to assess the significance of each model. %3D Descriptives 95% Confidence Interval for Std. Deviation Mean Mean helpusa HOW IMPORTANT TO HELP WORSE OFF PPL IN AMERICA Std. Error Lower Bound Upper Bound 1.00 Democrat 167 6.15 Minimum Maximum 2.00 1.117 .086 5.98 6.32 Independent 87 5.94 1.214 .130 5.68 3.00 Republican 101 6.20 7 5.76 1.184 .118 Total 5.53 6.00 355 5.99 1.169 .062 helpwrld HOW IMPORTANT TO HELP WORSE OFF PPL IN REST OF WORLD 1.00 Democrat 5.87 6.11 166…
Example 5 The highlights of the Railway budget for 1983-84 are as follows. The actual gross traffic receipts for 1981-82 was Rs. 3,538.24 crores. The Budget Estimates for 1982-83 in regard to Gross traffic receipts was Rs. 4,171.8 crores and the revised Budget Estimate for 1982-83 for the above item is Rs. 4,375.79 crores respectively. Whereas the budget estimates for 1983-84 for Gross traffic receipts is Rs. 5,343.63 crores, the actual total working expenses and the net railway revenue for 1981-82 were Rs. 3,182.05 crores and Rs. 403.1 crores respectively. The Budget Estimates and Revised Budget Estimates for 1982-83 in respect of total working expenses are Rs. 3,700.90 crores and Rs. 3,892.28 crores respectively. Whereas the corresponding estimates for 1982-83 in respect of net-railway revenue are Rs. 510.91 crores and Rs. 533.4 crores respectively, the estimated budget on total working expenses and net railway revenue for 1983-84 exceed the actuals for 1981-82 by Rs. 1,338.72 crores…
Empathy means being able to understand what others feel. To see how the brain expresses empathy, researchers recruited 16 couples in their midtwenties who were married or had been dating for at least two years. They zapped the man's hand with an electrode while the woman watched, and measured the activity in several parts of the woman's brain that would respond to her own pain. Brain activity was recorded as a fraction of the activity observed when the woman herself was zapped with the electrode. The women also completed a psychological test that measures empathy. Subject 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16 Empathy Score Brain Activity -0.114 0.39 0.019 0.379 0.010.4120.10.5150.153 0.746 0.250.56 0.214 0.717 0.366 0.778 37 51 44 54 56 67 68 54 48 47 68 65 28 62 26 100 1.2 sub jęct 9 10.0 -20 120 -8,4 Given that the equation for the regression line is ŷ = 0.00683x – 0.03024, what is the residual for subject 9?
please answer the following question thank you
Joan's Nursery specializes in custom-designed landscaping for residential areas. The estimated labor cost associated with a particular landscaping proposal is based on the number of plantings of trees, shrubs, and so on to be used for the project. For cost-estimating purposes, managers use two hours of labor time for the plant- ing of a medium-sized tree. Actual times from a sample of 10 plantings during the past month follow (times in hours).2.1 2.2 1.7 1.6 2.3 3.1 1.5 2.6 2.4 2.2 With a .05 level of significance, test to see whether the mean tree-planting time differs from two hours. a. State the null and alternative hypotheses. b. Compute the sample mean. c. Compute the sample standard deviation. d. What is the p-value? e. What is your conclusion?
5 and 6. The following data was collected from 1 bag of Hershey Kisses®. Each Kiss® was weighed in grams with the wrapper and recorded in the table below. Hershey claims that there are 368 grams of chocolate in one bag. Hershey Kiss Weights in Grams 4.76 4.72 4.74 4.55 4.91 4.74 4.78 4.71 4.80 4.78 4.78 4.75 4.79 4.82 4.91 4.83 4.68 4.74 4.70 4.80 4.70 4.76 4.70 4.83 4.93 4.74 4.84 4.82 4.76 4.77 4.72 4.78 4.83 4.75 4.74 4.68 4.84 4.71 4.71 4.76 4.66 4.78 4.73 4.74 4.92 4.77 4.80 4.79 4.86 4.64 4.78 4.70 4.75 4.78 4.76 4.83 4.66 4.77 4.83 4.78 4.69 4.81 4.68 4.78 4.88 4.72 4.85 4.85 4.81 4.74 4.80 4.82 4.84 4.70 4.85 4.70 4.81 4.72 4.79 4.73 4.61 Based on Hershey's® claim for 368 total net grams of chocolate in the bag, approximately how many Kisses® too many or too few are there? Assume that the Kisses® were weighed with the wrapper, each wrapper weighs 0.12 grams, and the net grams listed on the bag are for the chocolate only. Give some possible…
A crew is building a series of identical day spas around the United States for a lifestyle company. They build the first one in 160 days from groundbreaking to ribbon-cutting. If the crew's learning curve rate is 97%, it will take nearest 1/10th, to construct the fifth day spa. days, to the
Imagine that the figure below represents two means with their respective 95% Cls in a paired design. Either use this information to estimate the (approximate) p-value or explain why this is not possible.
Find the t –value from 20 degrees of freedom with alfa = 10% in two tails

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The efficiency expert at a computer company tested 40 engineers to estimate the average time it takes to assemble a certain computer component, getting a mean of 12.73 minutes and S.D of 2.06 minutes.