16. The average speed of greyhound dogs is about 18.1 meters per second. A particular greyhound breeder claims that her dogs are faster than the average greyhound. In a sample of 35 of her dogs, they ran, on the average, 18.7 meters per second with a standard deviation of 1.5. Is her claim correct?
A) Yes, because 2.37 falls in the critical range.
C) No, because there is not enough information.
B) Yes, because 1.5 is less than 10% of 18.7.
D) No, because the sample was too small.
I used the values μ = 18.1 n = 35 x-bar = 17.7 and σ = 1.5,
then used the formula z= (x-bar - μ)/(σ/√n) and z = 2.37 but I don’t know if that is enough to answer the question because alpha is not given. So how would I know if it is within the critical range?
2007-04-28 09:45:05 · 1 answers · asked by Sam B 2 in Science & Mathematics ➔ Mathematics
A. The answer is "yes". For this, you should strictly do a "t" test, although the answer will not be too far off for a "z" test. Generally, people will consider a 5 percent significance level as proof of hypothesis.
2007-04-28 09:55:30 · answer #1 · answered by cattbarf 7 · 0⤊ 0⤋