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Researchers conducted a study to find out if there is a difference in the use of...

Researchers conducted a study to find out if there is a difference in the use of online- learning by different age groups. Randomly selected participants were divided into two age groups. In the 16- to 29-year-old group, 7% of the 628 surveyed use online- learning, while 11% of the 2,309 participants 30 years old and older use online learning. (Set 1 for 16-29 year old group; set 2 for 30 years old and older)

38) Find x1

a. 44 b. 254 c. 628 d. 2309

39) Find x2

a. 44 b. 254 c.  628 d. 2309

Math   Statistics-And-Probability   
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Answer #1

Solution:

38)

The proportion of online learning age group 16 to 29 year is 0.07 and the sample size n1= 628

n1= 628

X1= 0.07*628

X1= 43.96

X1= 44

Option A is correct.

39) The proportion of online learning age group 30 year old and older is 0.11 and the sample size n2= 2309

n2= 2309

X2= 0.11*2309

X2= 253.99

X2=254

Option B is correct

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