Solution:
Given in the question
Standard deviation = 19
Alpha =0.01
Alpha/2 = 0.005 so Zalpha/2 = 2.575
Margin of error = 4
So margin of error can be calculated as
Margin of error = Zalpha/2*SD/sqrt(n)
4 = 2.575*19/sqrt(n)
N = (2.575*19/4)^2 = (12.23125)^2 = 150
by examining the mean amount of bacteria present per plate of culture when a fixed amount...
part a: ***the answer is not*** 2.19 2.728 2.73 2.44 2.14 2.13 part b: ***the answer is not**** (108.005, 119.995) (108, 120) Please help. i will rate A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s 13 cm2 and that he has a sample size of...
A biologist wishes to estimate the effect of an antibiotic on the growth of a particular bacterium by examining the mean amount of bacteria present per plate of culture when a fixed amount of the antibiotic is applied. Suppose he estimates that s = 10 cm2 and that he has a sample size of 35 with sample mean equal to 110 cm2. (a) What is the standard error of the sample mean? b) What is the the t* value needed...
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