1.Determine the critical values for these tests of a population standard deviation.

(a) Aright-tailed test with 14 degrees of freedom at the =0.05 level of significance

(b) Aleft-tailed test for a sample of size n=31 at the =0.1 level of significance

(c) Atwo-tailed test for a sample of size n=26 at the =0.1 level of significance

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(a) The critical value for thisright-tailed test is

nothing

2.To test H0:=2.7 versus H1:<2.7, a random sample of size n=17 is obtained from a population that is known to be normally distributed.

(a) If the sample standard deviation is determined to be s=1.1, compute the test statistic.

20=

nothing

1. (Round to three decimal places asneeded.)

3.To test H0:=2.2 versus H1:>2.2, a random sample of size n=15 is obtained from a population that is known to be normally distributed. Complete parts(a) through(d).

(a) If the sample standard deviation is determined to be s=2.1, compute the test statistic.

20=

nothing

(Round to three decimal places asneeded.)

4.Suppose a professional golfing association requires that the standard deviation of the diameter of a golf ball be less than 0.003 inch. Determine whether these randomly selected golf balls conform to this requirement at the =0.05 level of significance. Assume that the population is normally distributed.

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Click the icon to view thechi-square distribution table.

1.679

1.683

1.684

1.682

1.683

1.678

1.677

1.681

1.677

1.681

1.676

1.682

What are the correct hypotheses for thistest?

H0:

mu

sigma

p

p

greater than

>

not equals

less than

<

equals

=

nothing

versus H1:

sigma

p

p

mu

greater than

>

less than

<

not equals

equals

=

nothing

(Type integers or decimals. Do notround.)