QUESTION 16 A random sample of 25 light bulbs with a mean lifetime of 450 hrs and a standard deviation of 32 hou wa ww f

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Question 16 A Random Sample Of 25 Light Bulbs With A Mean Lifetime Of 450 Hrs And A Standard Deviation Of 32 Hou Wa Ww F 1 (44.02 KiB) Viewed 88 times

QUESTION 16 A random sample of 25 light bulbs with a mean lifetime of 450 hrs and a standard deviation of 32 hou wa ww from smally distributed population Find the resilience limit (LCL) for 95% confidence interval for the meantifetime of all light bulbs of this type Round your wer wp to two decimal places 436.79 437,46 46254 46321 QUESTION 17 A sample of size 15 is drawn from anoninally distributed population. Find the confidence level related to the critical value tag -2.97 96% O % 1.56% 99% QUESTION 18 The grade point averages (GPA) of 18 randomly selected college students are used to estimate the mean GPA of the college students. The GPA hom the same are as flow 23 33 28 18 02 3.1 40 0.7 3.1 23 20 3.1 34 13 25 2.6 37 a. (5 points) is it justed to use of the standard normal distribution to construct the confidence interval Elain b. (10 points of the population is assumed to be normally distributed, construct a % confidence interval for the population mean show your work in detail and unem For the toolbar, pro ALT F10 PC) ALTFN-F10 M) B IVS Paragraph Arial < 14px EA 2 + Ο 8 Ω ΟΙ -- 3 2 x X11 116 <> † Cosa and submit to our Chek SAN A walan