WHat is the critical value for a left tailed t-test with n=30 and a 0.05 level of significance?

We use the results of our first step to calculate a test-statistic. Why is this important and how does it relate to the concept of z-score, What is a p-value? What role does it play in the rejection of the null hypothesis? What does it mean to reject the null hypothesis? Does that guarantee that the null hypothesis is false?

You are conducting a study to see if the proportion of voters who prefer Candidate A is significantly different from 0.18. Thus you are performing a two-tailed test. Your sample data produce the test statistic z=-2.364. Find the p-value accurate to 4 decimal places. p-value =

You are running a left-tailed 2-sample z-test at the 0.05 level of significance and you find a test statistic of z=-1.87. Shoudl you reject or not reject the null?

Report of seatbelt usage showed 27.5% versus 21.3% with z =1.36 what is the correct one sided p value for test statistic z=1.36 How do I figure this out?

You are conducting a study to see if the accuracy rate for fingerprint identification is significantly different from 0.21. Thus you are performing a two-tailed test. Your sample data produce the test statistic z=2.728z=2.728. Find the p-value accurate to 4 decimal places.p-value =

A sample of 63 stocks traded on the NYSE that day showed that 22 went up. You are conducting a study to see if the proportion of stocks that went up is significantly more than 0.3. You use a significance level of a = 0.05. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a Ogreater than a This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that... OThere is sufficient evidence to warrant rejection of the claim that the proportion of stocks that went up is more than 0.3. O There is not sufficient evidence to warrant rejection of the claim that the proportion of stocks that went up is more than 0.3. The sample data support the claim that the proportion of stocks that went up is more than 0.3. There is not…

You are conducting a study to see if the accuracy rate for fingerprint identification is significantly less than 0.81. You use a significance level of a = 0.01. Ho:p = 0.81 H1:p < 0.81 You obtain a sample of size n = 219 in which there are 162 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... less than (or equal to) a greater than a This test statistic leads to a decision to... reject the null accept the null fail to reject the null As such, the final conclusion is that... There is sufficient evidence to warrant rejection of the claim that the accuracy rate for fingerprint identification is less than 0.81. There is not sufficient evidence to warrant rejection of the claim that the accuracy rate for fingerprint identification is less than 0.81. O The sample data support the claim that the accuracy rate…

You are conducting a study to see if the accuracy rate for fingerprint identification is significantly less than 0.85. You use a significance level of a = 0.005. Ho:p H1:p < 0.85 0.85 You obtain a sample of size n = 575 in which there are 473 successes. What is the test statistic for this sample? (Report answer accurate to three decimal places.) test statistic = What is the p-value for this sample? (Report answer accurate to four decimal places.) p-value = The p-value is... O less than (or equal to) a greater than a This test statistic leads to a decision to... O reject the null O accept the null O fail to reject the null

For a right tail test. Determine the critical value of the test statistics at 5% level of significance ?