Suppose researchers perform a large-sample test of a population proportion where the null hypothesis is that...
Suppose researchers perform a large-sample test of a population proportion where the null hypothesis is that the population proportion is 0.4, and the alternative hypothesis is that the population proportion is greater than 0.4 (one-sided). They obtain a z-statistic of 2 under the null hypothesis. What is the (one-sided) p-value?
Homework Answers
P value = P ( X > 2 ) = 1 - P ( Z < 2
) = 0.0228
looking for the value Z = 2 in standard normal table
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Suppose researchers perform a large-sample test of a population
proportion where the null hypothesis is that...
You conduct a hypothesis test about a population proportion p at a significance level of a...
You conduct a hypothesis test about a population proportion p at a significance level of a = .01 using a random sample of size n = 38. Your test statistic follows a standard normal distribution when the null hypothesis is true as an equality, and its value obtained from the sample is z = -2.75. Use the Distributions tool to help you answer the questions that follow. Select a Distribution Distributions 0 1 2 3 If you perform a lower...
The null and alternative hypotheses for a hypothesis test of the difference in two population means...
The null and alternative hypotheses for a hypothesis test of the difference in two population means are: Null Hypothesis: Alternative Hypothesis: Notice that the alternative hypothesis is a one-tailed test. Suppose ttest_ind method from scipy module is used to perform the test and the output is (3.25, 0.0043). What is the P-value for this hypothesis test? Select one. Question 2 options: 3.25 -3.25 0.0043 0.00215
5 In a hypothesis test for a proportion, the null hypothesis is HO: p = 0.7...
5 In a hypothesis test for a proportion, the null hypothesis is HO: p = 0.7 and the alternative hypothesis is H1: P = 0.7 with a = 0.05. Then we reject HO if the test statistic Z is 15 (5 Points) between -1.64 and 1.64 and cannot reject H0 otherwise greater than 1.64 or less than-1.64 and cannot reject H0 otherwise between -1.96 and 1.96 and cannot reject HO otherwise greater than 1.96 or less than-1.96 and cannot reject...
a) the sample proportion of women who suffer side effects is 10 b) the population proportion...
a) the sample proportion of women who suffer side effects is 10 b) the population proportion of women who suffer side effects is 10%. c) the sample proportion of women who suffer side effects is not equal to 10%. d) the population proportion of women who suffer side effects is greater than 10% e) the sample proportion of women who suffer side effects is less than 10%. 12-19. An auto manufacturer claims that its new 4 cylinder auto with manual...
Suppose a random sample of 100 observations from a binomial population gives a value of p...
Suppose a random sample of 100 observations from a binomial population gives a value of p = 0.45 and you wish to test the null hypothesis that the population parameter p is equal to 0.40 against the alternative hypothesis that p is greater than 0.40. Complete parts a through c. a. Noting that p = 0.45, what does your intuition tell you? Does the value of p appear to contradict the null hypothesis? O A. Yes, because p satisfies Hg:p>0.40...
In a test of hypothesis, the null hypothesis is that the population mean is equal to...
In a test of hypothesis, the null hypothesis is that the population mean is equal to 90 and the alternative hypothesis is that the population mean is not equal to 90. The test is to be made at the 10% significance level. A sample of 100 elements selected from this population produced a mean of 84 and a standard deviation of 8. What is the value of the observed test statistic, z?
Ch10.2 Hypothesis Tests for a Population Proportion Z-Test for a population proportion resting Hypotheses Regarding a...
Ch10.2 Hypothesis Tests for a Population Proportion Z-Test for a population proportion resting Hypotheses Regarding a Population Proportion, p. se the following steps to perform a Z-Test for a Proportion P-Value Approach By Hand Step 3 Compute the test statistic mple 1: The percentage of physicians who are women is 27.9%. In a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Use the P-value approach to determine whether there is...
Need help with this testing a population proportion problem. B A Response cats Hypothesis Test about...
Need help with this testing a
population proportion problem.
B A Response cats Hypothesis Test about a Population Proportion dogs cats =COUNTA(A2:A51) dogs Sample Size Response of Interest Count for Response Sample Proportion dogs cats =D5/D3 cats cats Hypothesized Value cats cats =SQRT(D8*(1-D8)/D3) Standard Error Test Statistic z cats dogs dogs dogs dogs =NORM.S.DIST(D11, TRUE) 14 p-value (Lower Tail) p-value (Upper Tail) p-value (Two Tail) 15 = 2*MIN(D13,014) Enter these same formulas in your downloaded Excel spreadsheet. Use the values...
The null and alternative hypotheses for a hypothesis test of the difference in two population means...
The null and alternative hypotheses for a hypothesis test of the difference in two population means are: Null Hypothesis: Alternative Hypothesis: Notice that the alternative hypothesis is a two-tailed test. Suppose ttest_ind method from scipy module is used to perform the test and the output is (-1.99, 0.0512). What is the P-value for this hypothesis test? Select one. Question 4 options: 0.0512 1.99 0.0256 -1.99
For an hypothesis test on the population proportion for the alternative hypothesis is LESS THAN, if...
For an hypothesis test on the population proportion for the alternative hypothesis is LESS THAN, if the p-value was 0.04, what is the test statistic? A -1.751 B 1.751 C -0.516 D 0.516
You conduct a hypothesis test about a population proportion p at a significance level of a = .01 using a random sample of size n = 38. Your test statistic follows a standard normal distribution when the null hypothesis is true as an equality, and its value obtained from the sample is z = -2.75. Use the Distributions tool to help you answer the questions that follow. Select a Distribution Distributions 0 1 2 3 If you perform a lower...
5 In a hypothesis test for a proportion, the null hypothesis is HO: p = 0.7 and the alternative hypothesis is H1: P = 0.7 with a = 0.05. Then we reject HO if the test statistic Z is 15 (5 Points) between -1.64 and 1.64 and cannot reject H0 otherwise greater than 1.64 or less than-1.64 and cannot reject H0 otherwise between -1.96 and 1.96 and cannot reject HO otherwise greater than 1.96 or less than-1.96 and cannot reject...
a) the sample proportion of women who suffer side effects is 10 b) the population proportion of women who suffer side effects is 10%. c) the sample proportion of women who suffer side effects is not equal to 10%. d) the population proportion of women who suffer side effects is greater than 10% e) the sample proportion of women who suffer side effects is less than 10%. 12-19. An auto manufacturer claims that its new 4 cylinder auto with manual...
Suppose a random sample of 100 observations from a binomial population gives a value of p = 0.45 and you wish to test the null hypothesis that the population parameter p is equal to 0.40 against the alternative hypothesis that p is greater than 0.40. Complete parts a through c. a. Noting that p = 0.45, what does your intuition tell you? Does the value of p appear to contradict the null hypothesis? O A. Yes, because p satisfies Hg:p>0.40...
Ch10.2 Hypothesis Tests for a Population Proportion Z-Test for a population proportion resting Hypotheses Regarding a Population Proportion, p. se the following steps to perform a Z-Test for a Proportion P-Value Approach By Hand Step 3 Compute the test statistic mple 1: The percentage of physicians who are women is 27.9%. In a survey of physicians employed by a large university health system, 45 of 120 randomly selected physicians were women. Use the P-value approach to determine whether there is...
Need help with this testing a
population proportion problem.
B A Response cats Hypothesis Test about a Population Proportion dogs cats =COUNTA(A2:A51) dogs Sample Size Response of Interest Count for Response Sample Proportion dogs cats =D5/D3 cats cats Hypothesized Value cats cats =SQRT(D8*(1-D8)/D3) Standard Error Test Statistic z cats dogs dogs dogs dogs =NORM.S.DIST(D11, TRUE) 14 p-value (Lower Tail) p-value (Upper Tail) p-value (Two Tail) 15 = 2*MIN(D13,014) Enter these same formulas in your downloaded Excel spreadsheet. Use the values...
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