Unformatted text preview: Student: Grady Simonton Course: Math119: Elementary Statistics - Spring 2.010 - CRN: 49239
Instructor: Shawn Parvini - 16 weeks Date: 3/18/10 Book: Triola: Elementary Statistics, 11e
Time: 4:00 PM If A denotes some event, what does A denote? If P(A) = 0.990, what is the value of HA)? If P(A) = 0.990, is A unusual? The complement of event A is denoted by A. Refer to the deﬁnition of the complement of A.
Event A denotes the complement of event A, meaning that A consists of all outcomes in which event A does not occur. The probability of A, denoted HA), can be determined according to the following formula.
NA) = 1 — P(A) Substitute P(A) = 0.990 into the formula to calculate HA). P(A) 1—0.990 0.010 An unusual event is one that is unlikely to occur. Given that HA) = 0.010, determine how likely it is for A to occur.
Having HA) of 0.010 means that A will occur about 10 times in a thousand times. The event A is unusual because P(A) = 0.010 indicates that A is very unlikely to occur. Page 1 ...
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- Spring '10