One of the questions in the Pew Internet & American Life Project asked adults if they used the Internet at least occasionally. The results showed that 454 out of 478 adults aged 18–29 answered Yes; 741 out of 833 adults aged 30–49 answered Yes; and 1,058 out of 1,644 adults aged 50 and over answered Yes. If required, round your answers to four decimal places. (a) Develop a point estimate of the proportion of adults aged 18–29 who use the Internet. (b) Develop a point estimate of the proportion of adults aged 30–49 who use the Internet. (c) Develop a point estimate of the proportion of adults aged 50 and over who use the Internet. (d) Comment on any apparent relationship between age and Internet use. The input in the box below will not be graded, but may be reviewed and considered by your instructor.

Step-by-step explanation:

Point estimate is also referred to as sample proportion, p. It is used to estimate the population proportion. The formula for determining point estimate is expressed as

p = x/n

Where

x = number of success

n = number of trials or samples

a) x = 454

n = 478

p = 454/478 = 0.9498

b) x = 741

n = 833

p = 741/833 = 0.8896

c) x = 1058

n = 1644

p = 1058/1644 = 0.6436

The proportion of people that used the internet decreased as the age group increased. Therefore, they are inversely proportional

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation:

the answers are in the images, i received 100% on this assignment. hope this !