2010-10-10_150612_week6lab_solution22

# 2010-10-10_150612_week6lab_solution22 - Math 221 Week 6 Lab...

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Math 221 **** Example Format **** Week 6 Lab Submitted by: (Insert Name) Part 1. Normal Distributions and Birth Weights in America 1(a) 37 to 39 weeks as mean is around 7.33 lb. 1(b) 40 weeks as mean is around 7.72 lb. 1(c) 28 to 31 weeks as mean is 4.07 lb. 2(a) 99.88%, Excel command used was NORMDIST(5.5,1.88,1.19,TRUE). 2(b) 43.83% 2(c) 4.66% 2(d) 2.75% 3(a) Above 8.7269, Excel command used was NORMINV(0.9,7.33,1.09). 3(b) Above 9.0853 4(a) 41.41%, Excel command used was NORMDIST(9,5.73,1.48,TRUE)- NORMDIST(6,5.73,1.48,TRUE). 4(b) 82.61% 4(c) 81.56% 5(a) 88.36%, Excel command used was NORMDIST(3.3,1.88,1.19,TRUE) 5(b) 5.03% 5(c) 0.01% Part 2. Age Distribution in the United States 1. 36.48 2. 36.21, Excel command used Average(). It is almost the same as the mean age in the United States. It agrees with the central limit theorem as it states that population mean should be equal to sample mean. 3. No, because histogram is not bell shaped. 4. Maximum value = 44.72 Minimum value = 28.14 Class width = (44.72-28.14)/9 = 1.85(after rounding up)

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Class Frequency relative frequency 28.14 - 29.99 1 2.8% 29.99 - 31.84
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2010-10-10_150612_week6lab_solution22 - Math 221 Week 6 Lab...

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