Felicia wanted to find the number of boys in the school band if 30% of the 50 students are boys. Is her answer correct? Explain
2 answers:
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Answer:
(a) The mean score of test A is 1210.
(b) The mean score of test A is 1210.
(c) The standard deviation of test A is 80.
(d) The value of Q₃ for test A is 1170.
(e) The value of median for test A is 1090.
(f) The value of IQR for test A is 290.
Step-by-step explanation:
The relation between two standardized tests <em>A</em> and <em>B</em> is:
The equation above approximates the relationship between scores on the two tests.
The summary statistics for test B are as follows:
Lowest Score = 21
Mean score = 29
Standard deviation = 2
Q₃ = 28
Median = 26
IQR = 6
(a)
Compute the lowest score on test A as follows:
Thus, the lowest score on test A is 890.
(b)
Compute the mean score of test A as follows:
<h2>Thus, the mean score of test A is 1210.
(c)
Compute the mean score standard deviation of test A as follows:
<h2>Thus, the standard deviation of test A is 80.
(d)
Compute the value of Q₃ for test A as follows:
Thus, the value of Q₃ for test A is 1170.
(e)
Compute the value of median for test A as follows:
Thus, the value of median for test A is 1090.
(f)
Compute the value of IQR for test A as follows:
Thus, the value of IQR for test A is 290.
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Answer: or
or
or
Step-by-step explanation:
Since, According to the question,
For each pound the operator’s guess differs from the contestant’s weight, the contestant will receive $3.
And, If a contestant weighing x pounds received $15
Then the guessed weight of contestant =
But, Again according to the question,
The guessed weight is 120 pounds,
Thus,
⇒
⇒ (by multiplying 3 on both sides)
⇒
⇒
⇒ ( On dividing both sides by 3 )