a.How did people first learn about a new product? A random sample of 200 shoppers at a particular store was asked their age and whether they heard about the product from a friend or through a local newspaper advertisement. The results indicated that 50 respondents were under 21 years of age, 90 people were in the age group between 21 and 35, and 60 respondents were older than 35 years of age. Of those under 21 years old, 30 heard about the product from a friend, and the remainder learned about the product through an advertisement in the local paper. One-third of the people in the age category from 21 to 35 first learned about the product from the local newspaper advertisement; the remainder of this age group learned about the product from a friend. A friend informed 30% of the people in the over-35 age category about the product; the remainder learned about it from the local newspaper advertisement.

i.Describe the data with a cross table.

ii.Describe the data graphically.

iii.Using the graph describe the data in terms of skewness and number of respondents in quartile

b.Jamming attacks on wireless networks. Students cybers often use wireless networks to communicate. To disrupt these communications, the VVU ICT department uses jamming attacks on the wireless networks. The International Journal of Production Economics (Vol. 172, 2016) described a study of 80 such jamming attacks. The configuration of the wireless network attacked was determined in each case. Configuration consists of network type (WLAN, WSN, or AHN) and number of channels (single- or multi- channel).

i.Suppose the 80 jamming attacks represent all jamming attacks by the U.S. military over the past several years, and these attacks are the only attacks of interest to the researchers. Do the data associated with these 80 attacks represent a population or a sample? Explain.

ii.If the 80 jamming attacks actually represent a sample. Describe the population for which this sample is representative.

iii.Identify the variable "network type" as quantitative or qualitative.

iv.Identify the variable "number of channels" as quantitative or qualitative.

v.Explain how to measure number of channels quantitatively.

d.Given the following data: 18, 27, 34, 52, 54, 59, 61, 68, 78, 82, 85, 87, 91, 93, 100.

i.What is the minimum and maximum value?

ii.median

iii.first, second, and third quartiles.

iv.Construct a box-and-whiskers plot for the data.

v.Comment on your diagram.