Self-Check 6.1
- Page ID
- 36490
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Name:___________________________________Date:__________________Row:___________ Self-Check 6.1
- What is the z-score of x= 9, if it is 1.5 standard deviations to the left of the mean?
- Suppose X~N(2, 3). What value of x has a z-score of –0.67?
- Suppose X~N(4, 2). What value of x is 1.5 standard deviations to the left of the mean?
- Suppose X~N(–1, 2). What is the z-score of x= 2?
- In a normal distribution, x = –2 and z = 6. This tells you that x = –2 is ____ standard deviations to the ____ (right or left) of the mean.
- The tallest living man at the time of this writing is Sultan Kosan, who has a height of 251cm. The shortest living man is Chandra Bahadur Dangi, who has a height of 54.6 cm. Heights of men have a mean of 174.12cm and a standard deviation of 7.10 cm. Which of these two men has the height that is more extreme?
- Blood platelet counts of women have a normal distribution with a mean of 255.1 and a standard deviation of 65.4. Use the empirical rule to approximate the following.
- Approximately what percentage of women have platelet counts between 124.3 and 385.9?
- Approximately what percentage of women have platelet counts between 189.7 and 385.9?
- About 99.7% of women have platelet counts between what two amounts?