A company produces a light bulb that lasts for 1,200 hours. Periodically, thecompany gets complaints that the life of these bulbs is much less than stated. Totest this claim, the company randomly sampled 80 bulbs and found that theaverage hours for this type of bulb is 1,150 hours with a standard deviation of 150hours. What conclusion will we make if we test Ho: μ ≥ 1200 and H₁: μ< 1200 at a= 0.05?A) Reject H, in favour of H₁.B) Accept Ho rather than H₁.AEC) Fail to reject Ho.D) We cannot tell what our decision will be with the information given.

The sample size is 80, sample mean is 1150 and sample standard deviation is 150.

Answered: A company produces a light bulb that…

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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Question 2 A population has parameters u = 36.1 and o = 49.7. You intend to draw a random sample of size n = 163. What is the mean of the distribution of sample means? What is the standard deviation of the distribution of sample means? (Report answer accurate to 2 decimal places.) Question Help: DVideo MMessage instructor DPost to forum Submit Question e Type here to search f2 esc ? 米 f6 144 IOI f8 $ 4. 1 3. 9. tab E R Y caps lock AL D 7. LL %24 CO
ol 106. Use the two scenarios presented in Figure 7.12 to answer the following question about the two sources of variability in ANOVA. 3.5 3.0 2.5 2.0 1.5 (i) HA: P₁ P2 ‡ P3 (iii) HA not all proportions are equal to this po 1.0 Figure 7.12: Within vs Between Variability in ANOVA onnisth Scenario A L (d) Recall that, O 2 H 3 2.05 2.10 2.15 2.20 2.25 2.30 2.35 (ii) Ho: M₁ M₂ = μ3 sans are (iv) HA: not all means are equal 720 qeaoluet alt sot mol 4 mobor 2924 (6) 2 3 4 gob za aim onbala (1) di batt (9) w-qodt fonqtotal bac o2 (6) (Troy ote12. (0) (a) Which scenario provides stronger evidence that the difference in factor level means represents true differences in the population means? Explain why in your own words. Scenario B 1 = stogol 05 O 1 oftaltete fest out of sulav gris I (b) Which scenario exhibits more variability within each factor level? Is this measured by SSError or SSFactor? Agulow (c) Which scenario exhibits more variability between each factor level? Is this measured by…
QUESTION 9 In the case of over-identification: а. you can use the F-statistic in a test of overidentifying restrictions. you cannot use TSLS for estimation purposes. С. you must rely on your personal knowledge of the empirical problem at hand to assess whether the instruments are exogenous. d. OLS and TSLS yield the same estimate. е. All of the above. f. None of the above.
Show step by step 1 Simulate the failure times of 100 units randomly selected from a Weibull distributionwith characteristic life θ = 100 and shape parameter α = 3. Plot the histogram ofthese 100 data points and comment on this histogram. 2. Suppose the data of the last question came from a life testing but the test was stoppedat the 50-th failure. Re-organize the data set and re-plot the histogram. Compare thisplot with the previous plot and comment on these plots. Show step by step
Question 5 of 5 -/1 View Policies Show Attempt History Current Attempt in Progress Suppose that x has a beta distribution with parameters a = 2.3 and B = 1. Determine to 4 decimal places the following: a. P(X < 0.23) i b. P(0.23 < X < 0.83) i c. Mean i d. Variance eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Activate Go to Settin I!
QUESTION 9 A population has a standard deviation of 8. What is the minimum sample size needed to estimate a mean to within 2 units with 66.8% confidence? O A. 13 ОВ. 15 ОС. 14 O D. 12 O E. 16 QUESTION 10 A sample of 40 is taken from a population where the population standard deviation is known to be 5. What z should be used for an 78.7% confiden 'a12 estimate of the mean, rounded to five decimal places? O A. 1.24518 O B. 1.24526 OC1 24541 DELL F10 F8 Esc F6 F7 F4 F5 F3 # 2$ % 7 3 4
I keep getting P-value incorrect. Please help, WILL thumbs up if correct.
hypothesis testing is the topic
A random sample of 14 observations taken from a population that is normally distributed produced a sample mean of 212.37 and a standard deviation of 16.35. Using the table in Appendix E3, find the critical and observed values of t for each of the following tests of hypotheses, using α = 0.1. a)H0: µ = 205 versus H1: µ ≠ 205 b)H0: µ ≤ 205 versus H1: µ > 205
Consider a paint-drying situation in which drying time for a test specimen is normally distributed with o = 6. The hypotheses H,: µ = 74 and H: µ < 74 are to be tested using a random sample of n = 25 observations. (a) How many standard deviations (of X) below the null value is x = 72.3? (Round your answer to two decimal places.) 1.42 standard deviations (b) If x = 72.3, what is the conclusion using a = 0.004? Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to four decimal places.) z = p-value = State the conclusion in the problem context. O Do not reject the null hypothesis. There is not sufficient evidence to conclude that the mean drying time is less than 74. O Do not reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 74. O Reject the null hypothesis. There is sufficient evidence to conclude that the mean drying time is less than 74. O Reject the null…

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