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1. Following a normal probability distribution with a mean of 200 and a standard deviation of...

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Basic Math

1. Following a normal probability distribution with a mean of200 and a standard deviation of 10, 95 percent  of thepopulation will be between:

200 and 220

180 and 220

180 and 200

less than 180

3. A family of four spends an average of $1000 per month with astandard deviation of $50.  This spending follows anormal continuous distribution.  

What is the probability that a family will spend more than $1050in a month?  (answer to 3 decimal places)

5. If two events, A and B, are mutually exclusive, then P(A orB) = P(A) + P(B) - P(A&B)

True

False

6. A coin is tossed 8 times.  It is a fair coin with 2sides, heads and tails.  What is the probability that in8 tosses, 7 or less will be flipped?

0.996

0.004

1

0.5

7. Following a normal probability distribution with a mean of200 and a standard deviation of 10, 68 percent  of thepopulation will be between:

170 and 230

190 and 210

180 and 220

Greater than 200

Answer & Explanation Solved by verified expert
4.4 Ratings (743 Votes)
1 Here it is given that distribution is normal with mean200and standard deviation10We need to find 95 percent of the population will lie betweenwhat valuesAs we know as per 689599 rule Approximately68 of the data fall within one    See Answer
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