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Stels [109]
3 years ago
5

The scores on a statistics exam have a normal distribution and have a mean of 99 and a standard deviation of 11. One individual’

s score is 128. Find the z-score of this value.
Mathematics
1 answer:
olga_2 [115]3 years ago
3 0

Answer:

2.64

Step-by-step explanation:

The z score is calculated as

z=(x-mean)/Sd

The mean of scores of statistics  exam=μ=99

The standard deviation of scores of statistics  exam=σ=11

Individual's score in statistics exam=x=128

z=128-99/11=29/11=2.64

Hence, the z score of individual score is 2.64.

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Answer:

A) The height increases, on average, by 1 meter each 0.48 year.

Step-by-step explanation:

Given that an agriculturalist working with Australian pine trees wanted to investigate the relationship between the age and the height of the Australian pine.

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A) The height increases, on average, by 1 meter each 0.48 year.

3 0
3 years ago
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The first step to solving this problem is to plug in 6 where you see a in the expression
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