Question

A sample is obtained from a population with u=40 and o=6. Which of the following sample would produce the z scores closest to 0?

a) a sample (n=36) with M=43

b) a sample (n=64) with M=42

c) a sample (n=100) with M=38

d) a sample (n=16) with M=37

Answer #1

Test statistic = z

= (M - ) / / n

(a)

z score

= (43 - 40) / 6 / 36

= 3

(b)

z score

= (42 - 40) / 6 / 64

= 2.67

(c)

z score

= (38 - 40) / 6 / 100

= -10

(d)

z score

= (37 - 40) / 6 / 16

= -2

**sample** d) a sample (n=16) with M=37 is closest
to 0

1) A sample is obtained from a population with μ = 35 and σ = 8.
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A sample (n = 36) with M = 33.5
A sample (n = 16) with M = 37
A sample (n = 64) with M = 33
A sample (n = 100) with M = 36
2) A sample obtained from a population with σ = 30 has a
standard error...

For a normal population with μ = 40 and σ = 10, which
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M = 36 for a sample of n = 4
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Find the z-scores for the sample mean for each of the following
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Assume normal distribution.
a. M = 56 for a sample of n = 4
b. M = 42 for a sample of n = 9
c. M = 51 for a sample of n =36

For a normal population with µ = 40 and σ = 10 which of the
following samples has the highest probability of being
obtained?
a.
M = 43 for a sample of n = 50
b.
M = 42 for a sample of n = 4
c.
M = 44 for a sample of n = 15
d.
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Consider the following table:
X 40 41 40 42 40 40 42 41 41 42 Y 32 43 28 45 31 34 48 42 36
38
Which one of the following statements is incorrect?
1. The slope is 6:33 2. The y–intercept is221:33 3. O Y D
6:33221:33Xi 4. Coefﬁcient of determination is 0:7022 5. When X D
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a. u=14,
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b.u=196,
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(Note that these are descriptive values that summarize the
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A. A
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I am studying customers' satisfaction level with their
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18
66
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28
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24
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b. What is the probability of selecting a sample of
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