3.exande: AvernonOFSOSONOTESECON 15B3. A package of light bulbs promises an average life of more than 750 hours per bulb. A consumergroup did not believe the claim and tested a sample of 40 bulbs. The average lifetime of these40 bulbs was 740 hours with s = 30 hours. The manufacturer responded that its claim wasbased on testing hundreds of bulbs.d. If the consumer group and manufacturer both make 95% confidence intervals for thepopulation's average lifetime, whose will probably be shorter?Can you tell for certain?b. Given the usual sampling assumptions, is there a 95% probability that 750 lies in the95% confidence interval of the manufacturer?Is the manufacturer's confidence interval more likely to contain the population meanbecause it is based on a larger sample?

We have to answer question related to sampling .

Answered: 3. exande: Avernon OF SO SO NOTES ECON…

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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Assessment Task: Statistical Intervals 1. A random sample of size n1 = 25, taken from a normal population with a standard deviation ol = 5, has a mean 1 = 80. A second random sample of size n2 = 36, taken from a different normal population with a standard deviation o2 3, has a mean 2 = 75. Find a 95% confidence interval for ul - u2 %3D
A researcher is interested in the impact of joining a weight loss program in the past 12 months on the individuals weight loss. The analysis was restricted to people age 16 and older who answered yes to the question "During the past 12 months, have you tried to lose weight?" About 5% of the sample had joined a weight loss program in the past year. 1. The researcher has decided to use propensity score analysis. What would be the appropriate estimator for this analysis: Average treatment effect, average treatment effect on the treated or average treatment effect on the untreated? Provide a justification for your choice.
Assume that last year in a particular state there were 211 children out of 1990 who were diagnosed with Autism Spectrum Disorder. Nationally, 1 out of 88 children are diagnosed with ASD. It is believed that the incident of ASD is more common in that state than nationally. Calculate a 96% confidence interval for the percentage of children in that state diagnosed with ASD.P: Parameter What is the correct parameter symbol for this problem? What is the wording of the parameter in the context of this problem? A: Assumptions Since information was collected from each object, what conditions do we need to check? Check all that apply. n≥30n≥30 or normal population. N≥20nN≥20n n(pˆ)≥10n(p̂)≥10 σσ is known. σσ is unknown. n(1−pˆ)≥10n(1-p̂)≥10 Check those assumptions: 1. nˆpnp^= which is 2. n(1−ˆp)n(1-p^)= which is 3. NN= which is If no N is given in the problem, use 1000000N: Name the procedure The…
Import the data from the Hill City Excel file into Minitab.You are trying to predict Price.Note: Mtn View=1 if there is a mountain view, 0 otherwise. The rest of the variables should be self explanatory. 1.Perform an F Test for overall significance of the model 2.Perform a T test for slope for the age variable 3. Find a 95% confidence interval for the slope of the SqFeet variable4. Create a prediction, CI, and PI for 1 new set of x values (any valid numbers you want), and interpret each.5. Run the residual plots and indicate if they show any problems with the model.
Both, the Cohen's d and confidence interval, measure the impact of the IV on the DV. The only difference is that the confidence interval does so for the population, whereas the Cohen's d does so for the sample.
A researcher has obtained the following scatter plot depicting the relationship between Y and X. On the graph, you can see three possible regression lines, which have a common y-intercept of bo = 35.48. Lines A, B and C cross the y-axis at coordinates (52, 106.78), (52, 66.52) and (52, 36.67), respectively. Given the confidence interval is (0.333, 1.122), choose the correct answer(s). rise Hint: Calculate slope of each line using known formula slope = run 35.48 0 Line A Line B Line C O O O 60 X 8 00 52 106.78 66.52 36.67 Select one or more: ✔a. The slope of Line A is within the confidence interval. ✓b. The slope of Line B is within the confidence interval. ✓ C. The slope of Line C is within the confidence interval.
A telephone poll of 841 adult Americans was reported in an issue of Time Magazine. One of the questions asked was, "What is the main problem facing the country?" Forty percent answered, "crime." Construct a 88% confidence interval for the population proportion of Americans who feel that crime is the main problem.p'=α2=zα2=Margin of Error: E=We are 88% confident that the proportion of Americans who feel that crime is the main problem is between____ and ____.
You fit a CAPM that regresses the excess return of Coca-cola on the excess market return using 20 years of monthly data. You estimate ∝=0,72, β=1,37, S2=20,38, σ2X=19,82 and μx=0,71. What is the 99% confidence interval for β ?
please solve D, E, F with step by step solution. I am trying to understand No minitab and no excel answers.
Suppose a marketing company randomly surveyed 404 households and found that in 214 of them, the woman made the majority of the purchasing decisions. Construct a 90% confidence interval for the population proportion of households where the women make the majority of the purchasing decisions.p'=α2=zα2=Margin of Error: E=We are 90% confident that the proportion of households in the population where women make the majority of purchasing decisions is between___ and ___.
Regression methods were used to analyze the data from a study investigating the relationship between roadway surface temperature x₁ = 1478, (x) and pavement deflection (y). Summary quantities were n = 20, Σy; = 12.75, Σy² = 8.86, Σx, Σ x = 143215.8, and Σxy. = 1083.67. Yi Find a 90.0% confidence interval on each of the following: (a) Slope. [i (b) Intercept. [i i i (c) Mean deflection when temperature x = 75 °F. [i i ] (Round your answers to 5 decimal places.) i ] (Round your answers to 3 decimal places.) (d) Find a 90.0% prediction interval on pavement deflection when the temperature is 75 °F. ] (Round your answers to 3 decimal places.) ] (Round your answers to 3 decimal places.)
6.02 Consider X1,..., X100 iid. Obtain a 90% confidence interval for the mean response of X having observed ī = 3.5 and s² = 1.44.

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