(50 POINTS) II. A survey was conducted with 50 college students to examine attit
ID: 3357840 • Letter: #
Question
(50 POINTS) II. A survey was conducted with 50 college students to examine attitude toward iPad. The table provided in the CourseWeb (under the "Other Documents" folder) has the resulting data giving whether the respondent owns an iPad (1: Yes, 0: NO), attitude toward iPad and attitude toward technology both measured on a 7 point scale (1: very unfavorable, 7: very favorable), and whether the respondent is a heavy user of internet(1: More than 5 hours per week , 0: Less than 5 hours per week). For all of the following questions include the Excel output. a) Draw histogram and cumulative distribution function of attitude toward iPad. (10 points) b) Calculate the confidence interval to estimate the mean attitude toward technology. (10 points) c) Given your answer in part "b)" above, does the data provide sufficient support for the following hypothesis "HI: Students have favorable attitude toward technology" Explain your answer. (10 points) For each of the following questions below use z-tests (either z-test for proportions or z-test for means). In your answers to each of these questions, state the null and alternate hypotheses, specify the statistical test you need to use, and interpret the result of your test (use significance level =0.05). d) Is there sufficient evidence in the data for "H2: Most students are heavy users of internet" (10 points) e) Is there sufficient evidence in the data for "H3: Students have favorable attitude toward iPad"? (10 points)Explanation / Answer
a)
b)
b) For attitude towards technology distribution
c)
The ratings range from 1 to 7 and hence the mean rating is 3.5 (mu1)
H0: The mean rating is equal to 3.5
H1: The mean rating is greater than 3.5
since p-value is less than 0.05, reject null hypothesis.
Therefore the attitude towards technology is favorable.
d)
The ratings range from 0 to 1 and proportion of 1 and 0 are
hence the mean proportion expected is 0.5 (hypothesized mean)
H0: The proportion of internet usage is equal to 0.5
H1: The proportion of internet usage is more than 0.5(heavy usage)
p exp = 0.5, p =0.7
since p-value is less than 0.05 reject the null hypothesis.
Hence the internet usage is heavy for most of the students.
4.76 avg 1.66 std dev 5.22 UCI=mean+1.96*std devn/sqrt(n) 4.30 LCI=mean-1.96*std devn/sqrt(n)Related Questions
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