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sveta [45]
3 years ago
15

In a psychology class, 55 students have a mean score of 97.6 on a test. then 18 more students take the test and their mean score

is 70. what is the mean score of all of these students together? round to one decimal place. mean of the scores of all the students =
Mathematics
1 answer:
nikdorinn [45]3 years ago
7 0
The mean of this problem is 1334
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An office building is built in the shape of a rectangular prism. It has a length of 168 yards, a width of 115 yards, and a heigh
Gnoma [55]
Volume= L x w x h
v=168 x 115 x 96
v=1,854,720 cubic yards
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Whats the Answer to this?
sineoko [7]

Answer:

85%?

Step-by-step explanation:

going between so im guessing.

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Hey can anyone please help me with these t questions asap?
rosijanka [135]

Answer:

21) 27

22) 2 (the third one has a few people in it)

Step-by-step explanation:

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hodyreva [135]

Answer:

The volume of the sphere is 972π mm³

Step-by-step explanation:

To calculate the volume of a sphere we have to use the following formula:

V = volume

r = radius  = 9mm

π = pi

V = ⁴⁄₃πr³

we replace with the known values

V = ⁴⁄₃ * π * (9mm)³

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V = π * 972mm³

V = 972π mm³

The volume of the sphere is 972π mm³

7 0
3 years ago
In the largest clinical trial ever​ conducted, 401,974 children were randomly assigned to two groups. The treatment group consis
BARSIC [14]

Answer:

The requirements for the hypothesis test does satisfied the method for testing the claim that from two population proportions the rate of polio is less for children given the salk vaccine.

Step-by-step explanation:

The percentage of children in the treatment group was:

(201229/401974)*100 = 49.9%

The percentage of children given placebo was:

(200745/401974)*100 = 50.1%

The percentage of children that developed polio in the treatment group:

(33/200745)*100 = 0.0164%

The percentage of children that developed polio in the placebo group:

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The percentage difference between the two group:

((0.0571-0.0164)/0.0571) = 61.62%

Therefore:

The amount of children used for each group was almost divided into half of the total amount of children. The test revealed although very small percentages of the both group developed polio, 68.62% more children given placebo than the children that was given the salk vaccine. Therefore, the study shows that the rate of polio is less for children given the salk vaccine and the the hypthesis test is satisfied.

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3 years ago
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