According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is 46 months. A researcher for a consumer advocate group tests this by selecting 10 bulbs at random. For the bulbs in the sample, the mean lifetime is 42 months. It is known that the population standard deviation of the lifetimes is 4 months. Assume that the population is normally distributed. Can we conclude, at the 0.01 level of significance, that the population mean lifetime, μ, of light bulbs made by this manufacturer differs from 46 months? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂:0 H₁ : (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) μ |x X a 0#0 S 00 0=0 OSO 0<0 Р O

# According to a report done by S & J Power, the mean lifetime of the light bulbs it manufactures is 46 months. A researcher for a consumer advocate group tests this by selecting 10 bulbs at random. For the bulbs in the sample, the mean lifetime is 42 months. It is known that the population standard deviation of the lifetimes is 4 months. Assume that the population is normally distributed. Can we conclude, at the 0.01 level of significance, that the population mean lifetime, μ, of light bulbs made by this manufacturer differs from 46 months? Perform a two-tailed test. Then complete the parts below. Carry your intermediate computations to three or more decimal places, and round your responses as specified below. (If necessary, consult a list of formulas.) (a) State the null hypothesis Ho and the alternative hypothesis H₁. H₂:0 H₁ : (b) Determine the type of test statistic to use. (Choose one) ▼ (c) Find the value of the test statistic. (Round to three or more decimal places.) μ |x X a 0#0 S 00 0=0 OSO 0<0 Р O

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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