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Assignment # 4 (Lessons 31- 36)
Question 1: (Marks: 2+5=7)
a. In a finite population with and , find the mean and variance for the sampling distribution of sample mean for n = 25.
b. The mean and standard deviation of the maximum loads supported by 50 cables are 13 tons and 0.80 tons respectively. Find the 99% confidence interval for the mean of the maximum loads of all cables produced by the company. Also interpret the findings.
Question 2: (Marks: 5+3=8)
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guys i got the solution of question 2 part 1st but find a problem please tell me from where we use the table of areaS in order to find out the value of 0<Z<2.381 FOR getting the right answer.
we can find the value from z table of areas under the normal curve from http://www.pinkmonkey.com/studyguides/subjects/stats/appendix/s58.gif
how can we find correct value from this table i'm littel confussed...
we want to find the value of 2.38 so in first colum 2.3 and in 9th row 0.4913 coz table strt from 0.00 and we want the value of 8 which cum in 9th row
i solved first 2 questions but don't know its right or wrong please confirme the answers
Question 1a: mean= 20 and variance = 7.84
Question 1b -3.94<= mean <= 5.54
the answer number of Q1a is correct but Q1b answer is different from my answer so i dnt knw ur answer is right or my
how did you find 2.38??? will you explain this...