A medical researcher wants to investigate the amount of time it takes for patients' headache pain to be relieved after taking a new prescription painkiller. She plans to use statistical methods to estimate the mean of the population of relief times. She believes that the population is normally distributed with a standard deviation of 18 minutes. How large a sample should she take to estimate the mean time to within 4 minutes with 97% confidence?
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n = [z*s/E]^2
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n = [2.17*18/4]^2 = 96 when rounded up

3 0

3 years ago

What will replace question mark? If 1243=21 , 2415=36, 3241=25, 4521=27 then 3542=?

qwelly [4]

The answer of 3542=48, if the given is 1243=21 , 2415=36, 3241=25, 4521=27.

Step-by-step explanation:

The given is,

1243=21

2415=36,

3241=25,

4521=27

Step:1

For, 1243 = 21

Above is solved by,

(1+2)×(4+3)=21

(3)×(7)=21

21=21

For, 2415 = 36

Above is solved by,

(2+4)×(1+5)=21

(6)×(6)=36

36=36

For,3241= 25

Above is solved by,

(3+2)×(4+1)=25

(5)×(5)=25

25=25

For, 4521= 27

Above is solved by,

(4+5)×(2+1)=27

(9)×(3)=27

27=27

For, 3542 = ?

Above is solved by,

= (3+5)×(4+2)

=(8)×(6)

3542=48

Result:

The answer of 3542=48, if the given is 1243=21 , 2415=36, 3241=25, 4521=27.

3 0

4 years ago