Consider a relatively nearby, single star, that is, a star that is not a member of a binary system and has no known orbiting pla
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Solution :
a). Let x denotes ACT scores.
ACT scores =
Mean,
Sample variance,
= 11
b). To test whether or not variance of ACT scores of population (say ) of the UTC students is significantly more than 8.
Consider the hypothesis :
vs
It is a right tailed test and α = 0.05
We have
So test statics is
= 8.25
Since our and it falls in a acceptation region, hence we fail to reject
and conclude that variance is not greater than 8 significantly.