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Svetradugi [14.3K]
3 years ago
6

An experimental psychologist is interested in whether the color of an animal's surroundings affects learning rate. He tests 16 r

ats in a box with colorful wallpaper. The average rat (of this strain) can learn to run this type of maze in a box without any special coloring in an average of 25 trials, with a variance of 64, and a normal distribution. The mean number of trials to learn the maze, for the rats tested with the colorful wallpaper, is 11.What is the μM ?• A. 8• B. 11• C. 25• D. 64
Mathematics
1 answer:
Olin [163]3 years ago
8 0

Answer:  C. 25

Step-by-step explanation:

Given : The average rat (of this strain) can learn to run this type of maze in a box without any special coloring : \mu=25

The mean number of trials to learn the maze, for the rats tested with the colorful wallpaper= M= 11

We know that the sampling distribution D is given by :-

\mu_D=\mu

Similarly the mean of the distribution M in the given situation is given by :_

\mu_M=\mu=25

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brilliants [131]

Answer: P=47 inches

Step-by-step explanation:

First, you have to find the other side lengths. Two of the sides are equal to 20 because this is a rectangle. The first blank would be 20 because 20 times the other side length is equal to 70. Then you would divide 70 by 20 which would equal x. x would equal 3.5 in. Then the perimeter would be:

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7 0
3 years ago
Factor the expression completely.<br> -6.75 +2.25x
NARA [144]

Answer:

2,25[-3 + x]

Step-by-step explanation:

The Greatest Common Divisor [GCD] is 2,25; you factor that out, leaving the remaining result inside the brackets.

I am joyous to assist you anytime.

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3 years ago
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Vinvika [58]
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ANTONII [103]
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3 years ago
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Tanya [424]

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Step-by-step explanation:

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