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Author Question: A company checking the productivity of its assembly line monitored a random sample of workers for ... (Read 228 times)

hubes95

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on: Aug 30, 2019

Question 1

Which statement correctly compares t-distributions to the Normal distribution?
I.   t distributions are also mound shaped and symmetric.
II.  t distributions are more spread out than the normal distribution.
III. As degrees of freedom increase, the variance of t distributions becomes larger.
◦ I and II only
◦ I and III only
◦ II only
◦ I only
◦ I, II, and III

Question 2

A company checking the productivity of its assembly line monitored a random sample of workers for several days. They found that a 95% confidence interval for the mean number of items produced daily by each worker was (23,27). Which is true?
◦ 95% of all the workers average between 23 and 27 items a day.
◦ 95% of samples would show mean production between 23 and 27 items a day.
◦ Workers produce an average of 23 to 27 items on 95% of the days.
◦ We're 95% sure that the mean daily worker output is between 23 and 27 items.
◦ 95% of the workers sampled produced between 23 and 37 items a day.
Stats: Modeling the World ¦ Bock, Velleman, De Veaux ¦ 4th Edition
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Marked as best answer by hubes95 on Aug 30, 2019

patma1981

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Reply #1 on: Aug 30, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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hubes95

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Reply 2 on: Aug 30, 2019
:D TYSM

kalskdjl1212

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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