34. The producer of a manometer fluid indicates the fluid density is 350 5 kgn 6

Question

34. The producer of a manometer fluid indicates the fluid density is 350 5 kgn 60 kg/m3? the probability that a sample of this fluid has a density greater than 3 . What is a. less than 1.25 % b, between 1.25 and 1.75% c, between 1.75 and 3.5% d. between 3.5 and 5.5% e, more than 5.5 % 35. For a sample of 8 measurements with a mean of 2.50 and a sample standard deviation of 0.20 the interval in which 95% of measurements from the population should fall is: a, Xi = 2.50 +/-0.18 b, Xi = 2.50 +/-0.39 C. Xi = 2.50 +/-0.40 d, Xi = 2.50 +/-0.46 e, Xi = 2.50 +/-0.47

Explanation / Answer

34.in normal distribution the area b/w UCL and LCL is 99.73%

=.9973

Area beyond the limits =1-.9973=0.0027

Since 360 is greater than Ucl

Area beyond UCL=.0027/2=0.00135

Probiblity that a sample lies in that area=0.00135*100=.135%

So correct option is (a)

(35)i normal distribution 95% area lies within +-1.96 sigma

limits

So 1.96*.2=.392

So correct answer is(b)

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