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Art [367]
3 years ago
6

Let x1, x2, ...x64 be a random sample from a distribution with mean 64 and standard deviation 4. then mean and the standard devi

ation of the sample mean are:
Mathematics
1 answer:
VARVARA [1.3K]3 years ago
7 0

The mean of sample means is the same as the mean of the underlying distribution.


The standard deviation of sample means is the original distribution sample mean divided by the square root of the number of samples.


Mean of sample mean distribution: 64

SD of sample mean distribution: 4/√64 = 1/2

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A dozen apples cost$4.92 for a dozen apples is a ratio of what per Apple
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Answer:

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Step-by-step explanation:

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3 years ago
16 - 2t = t + 9 + 4t
Inga [223]

Answer:

t = 1

Step-by-step explanation:

16 - 2t = t + 9 + 4t

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What is the slope of the line that passes through ( 1, -19 ) and ( -2,-7
Lapatulllka [165]

Answer:

-4

Step-by-step explanation:

We can find the slope when given two points by using the following

m = (y2-y1)/(x2-x1)

  = (-7--19)/(-2 -1)

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3 0
3 years ago
Denna has 80 books in her collection now. If 60% of the books are fiction,how many of the books are nonfiction?
il63 [147K]

Answer:

32 books are none fiction.

Step-by-step explanation:

If %60 of her books are fiction that means that 40%  are nonfiction (since in total there are 100% books and 60% are fiction which means that the rest is non-fiction). In order to find 40%, we just multiply the total amount of books by 0.4, and so we get...

80 x 0.4 = 32

Therefore 32 books are none fiction.

6 0
3 years ago
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