How to Find a Critical Z Value
LEARNING OBJECTIVE: Calculate a critical z-score for a left-tailed, right-tailed, or two-tailed test.
Select the correct statement.
a.) The critical z-score for a left-tailed test at a 12% significance level is -0.45.
b.) The critical z-score for a right-tailed test at a 9% significance level is 1.34.
c.) The critical z-score for a two-sided test at a 4% significance level is 1.75.
d.) The critical z-score for a two-sided test at a 20% significance level is 0.85.
The statement b
a. This statement is false because
P( z < -0.45 ) = 0.3264
b. This statement is correct because,
P( z > 1.34 ) = 1 - P(z < 1.34) = 1 - 0.9099 = 0.09
c. This statement is false because
If 1.75 is critical z score for two sided test at a 4% level of significance then probability less than -1.75 is 0.02 and probability greater than 1.75 is 0.02.
But,
P(z<-1.75)=0.04
d. This statement is false because
If 0.85 is critical z score for two sided test at a 20% level of significance then probability less than -0.85 is 0.10 and probability greater than 0.85 is 0.10.
But,
P(z<-0.85)=0.20
P(-1.75 < z < 1.75) = P( z<1.75 ) - P(z < -1.75 ) = 0.9599 - 0.04 =
Calculate a critical z-score for a left-tailed, right-tailed, or two-tailed test.
Select the correct statement. a.) The critical z-score for a two-sided test at a 3% significance level is 2.17. b.) The critical z-score for a left-tailed test at a 25% significance level is -0.40. c.) The critical z-score for a two-sided test at a 5% significance level is 1.65. d.) The critical z-score for a right-tailed test at a 17% significance level is 0.57.
Determine the critical value for a left-tailed test regarding a population proportion at the alpha = 0.05 level of significance. Use the correct Table to determine the Z score = ________________.
idk if its a left tailed or right tailed z test, or a left tailed t test, or a two tailed z test. Im also having trouble finding the p vale Jump to level 1 A political campaign is interested in whether city 1 has more support for raising the minimum wage than city 2. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1, a poll of 800 randomly selected...
idk if its a left tailed or right tailed z test, or a left tailed t test, or a two tailed z test. Im also having trouble finding the p value A political campaign is interested in whether city 1 has more support for raising the minimum wage than city 2. Polls were conducted in the two largest cities in the state about raising the minimum wage. In city 1, a poll of 800 randomly selected voters found that 220...
(a) Determine the critical value(s) for a right-tailed test of a population mean at the α=0.05 level of significance with 10 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the alphaαequals=0.01level 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 =0.10 level of significance based on a sample size of n=16.
Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a=0.10 level of significance with 10 degrees of freedom (b) Determine the critical value(s) for a left-tailed test of a population mean at the a=0.10 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 a= 0.05 level of significance based on...
Complete parts (a) through (c) below. (a) Determine the critical value(s) for a right-tailed test of a population mean at the a = 0.01 level of significance with 15 degrees of freedom. (b) Determine the critical value(s) for a left-tailed test of a population mean at the a = 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 a=0.10 level of...
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Complete parts (a) through (c) below (a) Determine the critical value(s) for a right-tailed test of a population mean at the ?-0.05 level of significance with 10 degrees of freedom (b Determine the critical value(s) for a left-tailed test of a population mean at the ? 0 01 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 ?:0.01 level of significance based on a...
Page > of 8 0 2. And the t critical value for a left tailed test at a 0.1 level of significance and df - 11. A) 1.80 B) 1.36 C) 2.72 D) -136 E) None of the Above 3. Find the z critical value for a right tailed test with n=23,0.05, a = 0.01 A) 2.33 B) 1.645 ) -1.645 D) -2.33 E) None of the Above 4. Classify the hypothesis test as left-tailed, right-tailed, or two tailed: The...