QUESTION 1 When necessary conditions are met, a one tailed test is being conducted to test...
QUESTION 1 When necessary conditions are met, a one tailed test is being conducted to test the difference between two populations. If the test statistics is 2:14, the p-value is
(1) 0:9838
(2) 0:0162
(3) 0:0179
(4) 0:1075
(5) 0:8925
QUESTION 2 Independent random samples of sizes n1 D 16 and n2 D 20 were selected from populations with parameters 1 D 10; 1 D 2; 2 D 20 and 2 D 2:8284: The E-tutor wants to test if the two population means are different. Which one of the following statements is incorrect?
(1) H0 : 12D0 vs H1:126D0
(2) The standard error for Nx1 Nx2 is 0:8602:
(3) The critical value at 5% level is 1:96:
(4) The rejection region is z > 1;96 and z < 1;91:
(5) Nx1 N x2 is normally distributed if the populations are normal.
Homework Answers
My dear student i am allowed to solve one question at a time . So i am solving the first one in the pic. Thank you
Add Answer to:
QUESTION 1 When necessary conditions are met, a one tailed test
is being conducted to test...
When the necessary conditions are met, a two-tailed test is being conducted to test the difference...
When the necessary conditions are met, a two-tailed test is being conducted to test the difference between two population proportions. The two sample proportions are p1hat=0.052 and p2hat=0.023 and the standard error of the sampling distribution of p1-p2 is 0.0085. The calculated value of the test statistic will be z = 3.41. A. True B. False
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment...
Multiple Choice: Question #1 A two tailed hypothesis test is being used to evaluate a treatment effect with ( a = .05). if the sample data produce a Z-score of ( z= -2.24), what is the correct decision? A. Reject the null hypothesis and conclude that the treatment has no effect B. Reject the null hypothesis and conclude that the treatment has an effect C. Fail to reject the null Hypothesis and conclude that the treatment has no effect D....
Find the sample proportions and test statistic for equal proportions. (a-1) Dissatisfied workers in two companies:...
Find the sample proportions and test statistic for equal proportions. (a-1) Dissatisfied workers in two companies: x1 = 46, n1 = 100, x2 = 36, n2 = 100, α = .05, two-tailed test. (Round your answers to 4 decimal places. Use Excel to calculate the p-value.) p1 p2 zcalc p-value zα/2 +/- (a-2) Choose the appropriate hypotheses. a. H0:π1 – π2= 0 vs. H1:π1 – π2 ≠ 0. Reject H0 if zcalc < –1.96 or zcalc...
Find the sample proportions and test statistic for equal proportions. (a-1) Dissatisfied workers in two companies:...
Find the sample proportions and test statistic for equal proportions. (a-1) Dissatisfied workers in two companies: x1 = 46, n1 = 100, x2 = 36, n2 = 100, α = .05, two-tailed test. (Round your answers to 4 decimal places. Use Excel to calculate the p-value.) p1 p2 zcalc p-value zα/2 +/- (a-2) Choose the appropriate hypotheses. a. H0:π1 – π2 = 0 vs. H1:π1 – π2 ≠ 0. Reject H0 if zcalc < –1.96 or zcalc > 1.96 b....
One-Sample Test Test Value = 1 ...
One-Sample Test Test Value = 1 t df Sig. (2-tailed) Mean Difference 95% Confidence Interval of the Difference Lower Upper What is your gender? -11.787 79 .000 -.637 -.75 -.53 Hypothetical exam scores (out of 100) 98.022 79 .000 84.438 82.72 86.15 Which of the following is the null hypothesis? Highlight or circle your answer. [.5 points] a) H0: µ1 = µ2 b) H1:...
Independent random samples of n1 = 120 and n2 = 120 observations were randomly selected from...
Independent random samples of n1 = 120 and n2 = 120 observations were randomly selected from binomial populations 1 and 2, respectively. Sample 1 had 62 successes, and sample 2 had 67 successes. You wish to perform a hypothesis test to determine if there is a difference in the sample proportions p1 and p2. (a) State the null and alternative hypotheses. - H0: (p1 − p2) = 0 versus Ha: (p1 − p2) ≠ 0 - H0: (p1 − p2)...
To identify the correct Z(critical), it is important to determine whether the hypothesis test is one-tailed...
To identify the correct Z(critical), it is important to determine whether the hypothesis test is one-tailed or two-tailed. The decision between a one- and two-tailed hypothesis is based on the researcher's expectations about the population from which the sample was selected. Many people believe that millennials are having more sex than people during the sexual revolution. You wonder whether the cohort currently in their mid-20s have had more sexual partners than older generations. Assume that the the average number of...
Conduct a test at the a = 0.10 level of significance by determining (a) the null...
Conduct a test at the a = 0.10 level of significance by determining (a) the null and alternative hypotheses, (b) the test statistic, and (c) the P-value. Assume the samples were obtained independently from a large population using simple random sampling. Test whether p 1 greater than p 2. The sample data are x1 = 127, n1 = 247, x2 = 142, and n2 = 312 Choose the correct null and alternative hypotheses below. A. H0 : p1 = p2...
A 0.01 significance level is used for a hypothesis test of the claim that when parents...
A 0.01 significance level is used for a hypothesis test of the claim that when parents use a particular method of gender selection, the proportion of baby girls is less less than 0.5. Assume that sample data consists of 45 girls in 100 births, so the sample statistic of StartFraction 9 Over 20 EndFraction 9 20 results in a z score that is 1 standard deviation below below 0. Complete parts (a) through (h) below. Click here to view page...
Independent random samples of 180 observations were randomly selected from binomial populations 1 and 2, respectively....
Independent random samples of 180 observations were randomly selected from binomial populations 1 and 2, respectively. Sample 1 had 104 successes, and sample 2 had 113 successes. Suppose that, for practical reasons, you know that p1 cannot be larger than p2. Test the appropriate hypothesis using α = 0.10. Given: H0: (p1 − p2) = 0 versus Ha: (p1 − p2) < 0 Solve: Find the test statistic. (Round your answer to two decimal places.) z = ?? Find the...
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago