Mathematics, 03.12.2020 05:50 BUBBA5990
Suppose SAT math scores are normally distributed with a mean of 516 and a standard
deviation of 115 while ACT math scores have a Normal distribution with a mean of 22
and a standard deviation of 5. Anna scored 650 on the SAT math and Bob scored 29
on the ACT math. Assuming that both tests measure the same kind of ability, who did
better in terms of the standardized z-score?
a. Anna
b. Bob
c. They did relatively the same
d. Impossible to tell because of the scaling.
Answers: 2
Mathematics, 21.06.2019 19:40
Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.
Answers: 3
Mathematics, 22.06.2019 01:30
A23 β year β old male buys 100/300/100 liability insurance, collision insurance with a $100 deductible, and comprehensive insurance with a $250 deductible? what is his total annual premium? (a) $1142.00 (b) $1765.45 (c) $1770.10 (d) $1785.25
Answers: 2
Suppose SAT math scores are normally distributed with a mean of 516 and a standard
deviation of 115...
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