TAT 200 Homework 9 Complete Solution$ 15.00

Microsoft Word – STAT 200 Homework 9.docx

  1. Anationalrepresentativesurveyofstudentsingrades7-12askedaboutthe experience of these students with respect to sexual harassment. The students were asked whether or not they were harassed in person and whether or not they were harassed online. Here are the data for the boys:
    1. (a)  What is the sample proportion of being harassed in person given being harassed online? (call it ????”) What is the sample proportion of being harassed in person given not being harassed online? (call it ????#)
    2. (b)  Is there a difference between the two sample proportions? (Conduct a two sample proportion test with significance level 0.05)
    3. (c)  Is there an association between being harassed online and in person? (significant level 0.05)
    (d) What do you find when you compare your statistics in part (b) and (c)? [Check the squared z statistic in part (b)]
  2. APewInternetsurveyaskedcollegepresidentswhetherornottheybelieved that online courses offer an equal educational value when compared with courses taken in the classroom. The presidents were classified by the type of educational institution. Here are the data:

(a) Show the distribution of response using barplots for each of the institution type. (?barplot in R, check the argument ‘beside’)

(b) Is there an association between the presidents’ opinion to the question above with their institution types? (significant level 0.05)

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