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Chemistry: Post your doubts here!
Sodium hydrogencarbonate is the same as sodium bi-carbonate? -
~~jokes?? in here?? really??
- Eugene99
- Post #28,412
- Forum: Games and Fun Stuff
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Statistical Inference
Q16: The mean of the sample means is 75 The std of the sample means is 5/sqrt(40) = 0.7906 --------------------------- a. Less than 74. t(74) = (74-75)/0.7906 = -1.2649 P(xbar < 74) = P(t < -1.2649 when df = 39) = 0.1067 ---------------------------------------------------------- b. Between 74... -
Statistical Inference
Q17: Since sample size is large 50 (>30), we can assume that the sample distribution is normal. Hence P(the mean to be at least $950 per month) =P(m >=1950) =P((m-1200)/(s/n1/2) > (1950-1200)/(s/n1/2)) = P((m-1200)/(s/n1/2) > -7.07) = 1- F(-7.07) =1 (approximation) that is, the... -
Statistical Inference
Q10: a) 5C2 = 10 ten random samples b) (8,6), (8,4), (8,10), (8,6) (6,4), (6,10), (6,6), (4,10), (4,6) (10,6) means: ẋ(8,6) = 7, ẋ(8,4) = 6, ẋ(8,10) = 9 , ẋ(8,6) = 7, ẋ(6,4) = 5, ẋ(6,10) = 8, ẋ(6,6) = 6, ẋ(4,10) = 7, ẋ(4,6) = 5, ẋ(10,6) = 8 c) pop. mean & st. deviation μ = (8 +... -
Statistical Inference
Q8: a) Possible Samples: 0 0 1 mean = 1/3 0 0 3 mean = 1 0 0 6 mean = 3 0 3 6 mean = 3 0 1 3 mean = 4/3 0 1 6 mean = 7/3 1 3 6 mean = 10/3 b) (1/3 + 1 + 3 + 4/3 + 3 +7/3 + 10/3) / 7 and the population mean 0, 0, 1, 3, 6 mean is 10/5 = 2 c) Compare the two values -
Statistical Inference
A'right Q6: a) Using the 1st "2": 2,2: mean = 2 2,4: mean = 3 2,4: mean = 3 2,8: mean = 5 ---------------------- Using the 2nd "2": 2,2: mean = 2 2,4: mean = 3 2,4: mean = 3 2,8: mean = 5 ---------------------- Using the 1st "4": 4,2: = 3 4,2: = 38,2 4,4: = 4 4,8: = 6 ------------- Using the 2nd... -
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Deaf, dumb and blind - so they will not return {2:18}
Deaf, dumb and blind - so they will not return {2:18}- Eugene99
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A level Biology: Post your doubts here!
Please explain... how are 4 tRNA molecules needed? (A) -
Chemistry: Post your doubts here!
oh thanks a lot! I get that but I was confused because it was a carboxylic acid, wasn't it? -
...follows a normal distribution! or Binomial? xD My mind is gone just so mathematical!
...follows a normal distribution! or Binomial? xD My mind is gone just so mathematical!- Eugene99
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Chemistry: Post your doubts here!
I can understand until B is added to dilue H2S04 and we get 2hydroxycarboxylic acid but how does adding conc H2SO4, with heat, gets us CH2=CHCO2H and what reaction is this? -
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