If a researcher were conducting a two-tailed/non-directional hypothesis test with an alpha of 0.10 and a sample of size n=120, what would the Zcrit value be?
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If a researcher were conducting a two-tailed/non-directional hypothesis test with an alpha of 0.10 and a sample of size n=120, what would the Zcrit value be?
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- If the null hypothesis Ho : mean = 17.0 is rejected at alpha = 0.01 when a mean of 21.0 is obtained from a random sample, ?The lowest level of significance to reject the null hypothesis of no linear association between blood pressure and age is: OA: 0.003 OB: 0.05 OC: 0.0002 OD: 0.0001 OE: 0.04A researcher randomly sampled 30 graduates of an MBA program and recorded data about their starting salaries. Of primary interest to the researcher is whether starting salaries differ based on gender. The researcher performs a pooled-variance t-test of the mean salaries of the females (Population 1) andmales (Population 2) in the sample. Assume α = 0.10. What assumptions are necessary to conduct this hypothesis test? The samples were randomly and independently selected. Both populations of salaries (male and female) must have approximate normal distributions. The population variances are approximately equal.
- If a researcher were conducting a one-tailed/directional hypothesis test with an alpha of 0.01 and he chooses to place the critical region in the left-hand tail, what is the correct value for Zcrit?In this section, we used the statistic b1 as a basis for conducting a hypothesis test to decide whether a regression equation is useful for prediction. Identify two other statistics that can be used as a basis for such a test.If a researcher obtains a sample mean of M= 54, from a population with u = 46. With a given alpha, which combination of factors is most likely to result in rejecting the null hypothesis?
- A public research company says that 63% of U.S. adults are concerned about their jobs because of the current state of the economy. A social services group surveys 500 adults and has a result of 70%. Using an alpha of.05 test the hypothesis claim of 63%An online food delivery service in metro manila claims that the delivery time is not greater than 30 minutes. But a certain customer opposed the claim and found that the average time in the past 29 delivery services is 32 minutes with a variance of 16. Perform a hypothesis testing with a = 0.05 to see if the claim is correct.An engineer is comparing voltages for two types of batteries (K and Q) using a sample of 35 type K batteries and a sample of 44 type Q batteries. The type K batteries have a mean voltage of 8.56, and the population standard deviation is known to be 0.565. The type Q batteries have a mean voltage of 8.74, and the population standard deviation is known to be 0.307. Conduct a hypothesis test for the conjecture that the mean voltage for these two types of batteries is different. Let µj be the true mean voltage for type K batteries and µ2 be the true mean voltage for type Q batteries. Use a 0.05 level of significance. Step 3 of 4: Determine the decision rule for rejecting the null hypothesis Ho. Round the numerical portion of your answer to two decimal places.
- Question 2 Of 10000 randomly selected cases of lung cancer, 823 resulted in death within 10 years. Does this seem to indicate that the death rate from cancer is 8%? Use a 0.1372 level of significance. Answers that use CIs will not be accepted. Formulate and carry out the appropriate hypothesis test using the P-value approach.Data was collected on the size of towns and the high school drop out rate. A left tailed hypothesis test was performed for rr . If the p-value was 0.02 and α=0.1, then it can be concluded that larger towns tend to have higher drop out rates. true or falseAn article in the newspaper claims that 60% of registered drivers have the organ donor designation on their driver's license. A researcher at a hospital decides to investigate this claim. The researcher selects a random sample of 50 registered drivers and finds that 44.0% have the organ donor designation on their driver's license. Do the data provide convincing evidence at the ?α = 0.05 level that fewer than 60% of registered drivers have the organ donor designation on their license?