Find z if the normal curve area to the left of z is 0.3082
1 answer:
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Answer:
2
Step-by-step explanation:
for question a)
It would be easier if you converted these to improper fractions (currently it is in the form of a proper fraction)
to convert to improper fraction, you would multiply the denominator (bottom no. of fraction) by the whole number , then add that with the numerator (top no. of fraction) and put the whole thing over the denominator.
E.g.
7 = 7x4 + 1 = 29
Thus, improper fraction would be
do same thing for other one
thus ,
now,
-
however, you can't do this as the denominators are not the same, so multiply them by a number which would give the a common denominator (20 would be the best option for common denominator)
=
convert back to mixed number
2