A nursing student is exploring her employment options after graduation. She is interested in determining if there is any difference in the average pay of nurses in Kentucky versus Ohio. She takes a random sample of 235 BSN nurses working full-time in Kentucky and 235 BSN nurses working full-time in Ohio. She records the annual salary of each person. Which of the following statistical inference techniques should be used?

For this question, enter your final answer here in the Canvas exam.  You may show your work here or on scratch paper. Label each part of the question clearly.  If showing work on scratch paper, submit a photo of the work in the designated area in Canvas within 5 minutes of completing the exam.  Researchers want to test if the AuraLife blood pressure app is providing low readings.  If the app provides readings that are lower than the actual blood pressure, this is especially dangerous for people with hypertension.  To test if the app provides readings that are too low, a random sample of 85 people was taken.  The researchers checked each person’s blood pressure twice: once with the app and once with a traditional blood pressure cuff.  The order of the devices used was randomized.  The results showed a sample mean difference (traditional – app) of 12.4 mm/Hg systolic blood pressure and a sample standard deviation of 30 mm/Hg. Is this sufficient evidence to conclude that the app provides readings that are lower than the actual blood pressure?  Use α = 0.05 to conduct the test. a. State the hypotheses. b. Verify hypothesis testing conditions/requirements have been met. c. Determine the test statistic. d. Determine the p-value. e. Should the null hypothesis be rejected?  Explain why or why not (you may draw a graph to explain). f. State a conclusion using the context of this scenario. g. What type of error may have been made after conducting this test? 

Select the correct conclusion. A social media influencer stated that by following their advice, you can significantly improve your number of subscribers on YouTube.  A group of students tests this claim by randomly selecting 50 YouTubers who agreed to participate in the study and provided their number of subscribers before and after following the advice.  The test for improvement in number of subscribers for the 50 YouTubers at the 0.05 level of significance resulted in a p-value of 0.03. What should they conclude?

A study measured various cardiovascular risk factors in children at birth.  One item of interest was to determine if heart rates differ, on average, between Caucasian and African American newborns.  What statistical inference technique should be used?

Select the correct conclusion. A consumer group randomly selected 20 college textbooks and looked up the prices for each of them on two different internet web sites.  They tested for differences in prices between the two web sites at a 0.05 level of significance and calculated a p-value of 0.03.  What should they conclude?

Is it easier to hula hoop with a light-weight hula hoop than a weighted hula hoop? To investigate this question, 80 adults were randomly selected. Each person hula hooped with both the light-weight hula hoop and the weighted hula hoop. The time the hula hoop was kept in motion was recorded in seconds. Which one of the significance tests given below should be used?                                        

A study reports that the systolic blood pressure of study participants assigned a new drug treatment is 10mm/dl lower, on average, than those in the control group.  The margin of error for a 95% confidence interval is given as plus or minus 3 mg/dl.  This means

A study on nicotine dependence for teenage smokers obtained a random sample of seventh graders. Dependency scores were measured for two groups of teenage smokers: those who said they inhale and those who said they do not inhale.  The researchers want to test whether there is a significant difference in mean dependency scores between the two groups.  Which of the following statistical inference techniques should be used?

You are replicating a previously published study.  If you use the level of confidence and standard deviation as the previous study, but you increase the sample size for a confidence interval estimate, your margin of error will

Sales representatives at a large local logistics company receive commission pay each month in addition to their monthly base pay. A random sample of 65 sales representatives at this company is selected. The sample mean monthly commission pay was $3,451 and the standard deviation was $289. The 90% confidence interval estimate for the true mean monthly commission pay for sales representatives at this logistics company is between $ (lower bound) and $ (upper bound). Round your answer to two decimal places.