Question

How do I find critical values in excel given alpha with a two-tailed hypothesis test. I have a t- test statistic/

Answer #1

let

your "t" statistics have DF=r

test is two-tailed so there are two critical values one left tailed and other is right tailed

let level of significance =

then for left tailed critical value in excel write following formula

Left tailed critical value

for right-tailed critical value write this formula

for example let DF=r=10

level of significance =

then left tailed

=T.INV(0.025,10)

=-2.23

right tailed

=T.INV(0.975,10)

=2.23

Note: in excel for writing any formula you have to first write "=" then type formula

that neans your formula is "T.INV(0.975,10)" but it works iff you will write "=T.INV(0.975,10)"

1) Find the critical values t for a left-tailed test -t with
alpha=0.99 and n=17
2) Find the critical values t for a right-tailed test with
alpha=0.01 and n=21
3) Find the critical values t and -t for a two-tailed test with
alpha=0.05 and n=26

Use Excel to find the critical value of z for each hypothesis
test. (Negative values should be indicated by a minus sign. Round
your answers to 3 decimal places.) (a) 2 percent level of
significance, two-tailed test. Critical value of z ± (b) 1 percent
level of significance, right-tailed test. Critical value of z (c) 5
percent level of significance, left-tailed test. Critical value of
z

Use Excel to find the critical value of z for each hypothesis
test. (Negative values should be indicated by a minus sign. Round
your answers to 3 decimal places.) (a) 9 percent level of
significance, two-tailed test. Critical value of z ± __________ (b)
7 percent level of significance, right-tailed test. Critical value
of z _______ (c) 4 percent level of significance, left-tailed test.
Critical value of z___________.

1. You have a two-tailed test. The t critical value is 2.36 and
the test statistic is 3.11. Assume the null hypothesis is true. The
result is (a) Type I error (b) Type II error (c) Correct
decision
2. You have a right-tailed test. The t critical value is 1.74
and the test statistic is 1.46. Assume the null hypothesis is true.
The result is (a)Type I error (b) Type II error (c) Correct
decision
3. You have a right-tailed...

1. Your hypothesis test for a proportion has a two-tailed
critical region. The test statistic is z = -2.62. Find the p-value
accurate to 2 decimal places. p-value = ____________
2. Your hypothesis test for a mean with n = 26 has a left-tailed
critical region. The test statistic is tt = -3.26. Find the p-value
accurate to 2 decimal places.
p-value =___________________

Assume the computed t-statistic was t0=1.987
Find the t-critical value for a one-tailed test at the 0.05
significance level with 19
degrees of freedom. Is there sufficient evidence to reject the
null hypothesis?
Find the t-critical value for a one-tailed test at the 0.05
significance level with a sample
size of 30. Is there sufficient evidence to reject the null
hypothesis?
Find the t-critical value for a two-tailed test at the 0.05
significance level with 15
degrees of freedom. Is...

a. For the following degrees of freedom, list the critical
values for a one-tailed and two-tailed test at a .01 and .05 level
of significance.
.01 .05
df = (Infinity) ___ ___ (One-tailed test)
df = (Infinity) ___ ___ (Two-tailed test)
b. Refer to Table 8.4 in Chapter 8. How do the critical values
you listed in the previous question compare with those listed for
the z-distribution. Explain.

Find the χ2 critical values if you are conducting a χ2-two
tailed test based on a simple random sample of size 7, and using a
significance level α=0.02.
The left critical value is
The right critical value is

Using a table of critical t-values of the t distribution, find
the range of values for the P-value for a two-tailed test with
nequals14 and test statistic t equals 1.794 .

15. Calculate the pp-value for each of the given hypothesis test
scenarios below. Round pp-values to four decimal places.
Find the p-value for a left-tailed test of hypothesis
for a mean when the test statistic has been calculated as -2.08.
Assume the population standard deviation is known.
p-value=
Find the p-value for a right-tailed test of hypothesis
for a mean when the test statistic has been calculated as 1.26.
Assume the population standard deviation is known.
p-value=
Find the p-value...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 10 minutes ago

asked 12 minutes ago

asked 14 minutes ago

asked 24 minutes ago

asked 27 minutes ago

asked 28 minutes ago

asked 46 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago