Question

a, Find the critical F-value for a right-tailed test using the indicated level of significance α and degrees of freedom d.f.N and d.f.D.

α=0.10, d.f.N=7, Dd.f.=24

The critical F-value is _____

(Round to two decimal places as needed.)

b.Find the expected frequency, Ei, for the given values of n and pi.

n=230, pi=0.27

Ei= _____ (Type an integer or a decimal.)

Answer #1

a). In order to reduce the size of the table of critical values, the larger sample variance is placed in the numerator. The critical value of F for a right-tailed test is found by dividing the significance level in half. Hence for a test at the 0.10 level, use the F-table for the 0.10 significance level. For 6 = 7-1 degrees of freedom in the numerator and 23 = 24-1 degrees of freedom in the denominator, the critical value is 2.05.

b). Ei = n*pi = 230*0.27 = 62.1

Finding F critical for Variances
Use the F-distribution to find the degrees of freedon for the
numerator (d.f.N.), the degrees of freedom for the Denominator
(d.f.D.) and the critical F-value
Use the closest value when looking up the d.f.N. and d.f.D. in
the tables.
Test
alpha
α
Sample 1
Sample 2
d.f.N.
d.f.D.
F critical
Right
0.01
s12=37
n1=14
s22=89
n2=25
Two-tailed
0.10
s12=164
n1=21
s22=53
n2=17
Right
0.05
s12=92.8
n1=11
s22=43.6
n2=11
Finding F critical for ANOVA
Use the...

Finding F critical for Variances
Use the F-distribution to find the degrees of freedon for the
numerator (d.f.N.), the degrees of freedom for the Denominator
(d.f.D.) and the critical F-value
Use the closest value when looking up the d.f.N. and d.f.D. in
the tables.
Test
alpha
α
Sample 1
Sample 2
d.f.N.
d.f.D.
F critical
Right
0.01
s12=37
n1=14
s22=89
n2=25
Two-tailed
0.10
s12=164
n1=21
s22=53
n2=17
Right
0.05
s12=92.8
n1=11
s22=43.6
n2=11

Complete parts (a) through (c) below.
(a) Determine the critical value(s) for a right-tailed test
of a population mean at the α=0.01 level of significance with 20
degrees of freedom.
(b) Determine the critical value(s) for a left-tailed test of
a population mean at the α=0.05 level of significance based on a
sample size of n =15
(c) Determine the critical value(s) for a two-tailed test of
a population mean at the α =0.01 level of significance based on a...

a.Two-tailed test, α=0.07
The critical value(s) is/are z= ______
(Round to two decimal places as needed. Use a comma to separate
answers as needed.)
b. Right-tailed test, α=0.10, n=6
The critical value(s) is/are _____
(Round to the nearest thousandth as needed. Use a comma to
separate answers as needed.)
c. TwoTwo-tailed test, α=0.10, n=28
The critical value(s) is/are ______
(Round to the nearest thousandth as needed. Use a comma to
separate answers asneeded.)

Complete parts (a) through (c) below.
(a) Determine the critical value(s) for a right-tailed test
of a population mean at the alphaα=.10 with 15 degrees of freedom.
tcrit=
b) Determine the critical value(s) for a left-tailed test of a
population mean at the α=0.05 level of significance based on a
sample size of n=20
c) Determine the critical value(s) for a two-tailed test of a
population mean at the α=.01 level of significance based on a
sample size of n=18

For a right-tailed Z Test, if the test value is 1.87, then for
which significance level will the decision be to not reject
the
null hypothesis?
(a) α = 0.10 (b) α = 0.05 (c) α = 0.01

Find the critical values for a a. right tailed F test when α
=0.05 and n1=10 and n2=12. b. left tailed F test when α =0.05 and
ν1=11 and ν2=16. c. two tailed F test when α =0.05 and ν1=21 and
ν2=16.

Find the critical value and rejection region for the type of
t-test with level of significance α and sample size n. Two-tailed
test, α = 0.1, n = 36

Use the t-distribution table to find the critical value(s) for
the indicated alternative hypotheses, level of significance
alpha, and sample sizes n 1 and n 2. Assume that the samples are
independent, normal, and random. Answer parts (a) and (b). Upper
H Subscript a: mu 1 not equals mu 2, alphaequals0.20, n
1equals10, n 2equals2 (a) Find the critical value(s) assuming
that the population variances are equal. nothing (Type an integer
or decimal rounded to three decimal places as needed....

Determine the critical value for a left-tailed test of a
population mean at the α = 0.025 level of significance based on a
sample size of n = 18.

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