The Lengths Of Adult Males Hands Are Normally Distributed With Mean 191 Mm And Standard Deviation Is 7 Mm Suppose That 1 (54.3 KiB) Viewed 33 times
The Lengths Of Adult Males Hands Are Normally Distributed With Mean 191 Mm And Standard Deviation Is 7 Mm Suppose That 2 (54.98 KiB) Viewed 33 times
The lengths of adult males' hands are normally distributed with mean 191 mm and standard deviation is 7 mm. Suppose that 48 individuals are randomly chosen. Round all answers to 4 where possible. a. What is the distribution of ? ~ N( b. For the group of 48, find the probability that the average hand length is less than 193. c. Find the first quartile for the average adult male hand length for this sample size. d. For part b), is the assumption that the distribution is normal necessary? Yes No
Suppose the age that children learn to walk is normally distributed with mean 13 months and standard deviation 2.4 month. 33 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. a. What is the distribution of X? X~ N( b. What is the distribution of ? ~ N( c. What is the probability that one randomly selected person learned to walk when the person was between 12.6 and 13.1 months old? d. For the 33 people, find the probability that the average age that they learned to walk is between 12.6 and 13.1 months old. e. For part d), is the assumption that the distribution is normal necessary? Yes No f. Find the IQR for the average first time walking age for groups of 33 people. Q1 = Q3 = IQR: months months months
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