Suppose we would like to extract positive and negative itemsets from a data set that contains d items.
(a) Consider an approach where we introduce a new variable to represent
each negative item. With this approach, the number of items grows
from d to 2d. What is the total size of the itemset lattice, assuming
that an itemset may contain both positive and negative items of the
same variable?
(b) Assume that an itemset must contain positive or negative items of dif-
ferent variables. For example, the itemset {a, a, b, c} is invalid because
it contains both positive and negative items for variable a. What is the
total size of the itemset lattice?
(a) 
(b) 
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A(n) ________ value can either be another calculated field that resolves to a value or an absolute value
Fill in the blank(s) with the appropriate word(s).
What statement is true regarding a firewall on a computer that attaches to the network wirelessly? Note that the wireless network connects to the wired network for Internet access
A) The firewall can protect the computer but not the data sent between the computer and the access point. B) The firewall cannot protect the computer. C) The firewall can protect the computer only from other wireless NICs. D) The firewall can protect the computer only from viruses and spyware.