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:
(115/201229)*100 = 0.0571%
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.
Answer: that is the solution to the question
Step-by-step explanation:
<h3>
Answer is 63,000 pounds</h3>
The ratio 3:4 means for every 3 pounds made in away team tickets versus home team tickets. Multiply both sides by 9000 to have that 4 turn into 36000. The ratio 3:4 will then turn into 27000:36000
With this new ratio, we see that the away team pulls in 27000 and the home team pulls in 36000. Add the two amounts to get the final answer
27000+36000 = 63000
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We could alternatively add 3 and 4 (from the ratio 3:4) to get 3+4 = 7. Then multiply by that same scale factor 9000 getting 9000*7 = 63000.
Answer:
Step-by-step explanation:
Answer:
<u>n = 30</u>
Step-by-step explanation:
5n = Mean of three numbers
391 = 1st number
n = 2nd number
n - 1 = 3rd number
Therefore, to solve for x, we can write this equation:
(391 + n + n - 1)/3 = 5n
391 + 2n - 1 = 15n (Lowest Common Denominator is 3)
2n - 15n = -390 (Like terms)
-13n = -390
n = -390/-13
<u>n = 30</u>
Proof of n= 30 is correct:
(391 + n + n - 1)/3 = 5n
(391 + 30 + 29)/3 = 5 * 30
450/3 = 150
150 = 150
We proved n = 30 is correct
