Dallas Tampa Bay 30 60000 7000 45 55900 5900 xbar xbar Question 1A Can you conclude the average nursing salary in Tampa is less than the average nursing salary in Dallas at α=0.1? State the hypothesis in terms of Tampa-Dallas. Step 1: HO: Ha: Step 2: Step 3: Fill in row 42 if the hypothesis is one tailed. Reject HO if Fill in row 46 if the hypothesis is two tailed. The smaller number must be typed first. Reject HO if or Step 4: Step 5 Step 6: Step 7: HO Fill in row 56 iftheZ table is appropriate. P-value Fill in row 60 ifthet table is appropriate. The lower boundary must go on the left and the upper boundary on the right. P-value
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- Repeat Example 5 when microphone A receives the sound 4 seconds before microphone B.A hypothesis test produces a t statistic of t = +2.19. If the researcher is conducting a two-tailed hypothesis test with α = .05, how large does the sample have to be in order to reject the null hypothesis?A boss wants to show that productivity decreases when the boss leaves the office. An office of 26 employees handed in productivity reports when the boss was absent (M1=5, SS1=250) compared to 36 employees who handed in reports when the boss was present (M2=8, SS2=420). a) What is the null and alternative hypothesis? a Ho:μ 1-μ2≠0; H1:μ 1-μ2=0 b Ho:μ 1-μ2<0; H1:μ 1-μ2>0 c Ho:μ 1-μ2=0; H1:μ 1-μ2≠0 d Ho:μ 1-μ2>0; H1:μ 1-μ2<0 b) Compute tobt? c) Compute df? d) Given the α=0.05, compute the negative value of tcrit? e) Is tobt significant?
- 1. Someone is performing a hypothesis test to see if the average time to complete a high jump is less than8 seconds.(a) What is the null hypothesis?A.μ≥8B.μ≤8C.μ <8D.μ6= 8(b) What is the alternate hypothesis?A.μ >8B.μ= 8C.μ <8D.μ6= 8(c) What tail-type does your hypothesis test use?(d) Suppose the person concludes that ‘The data did not provide sufficient evidence that the averagetime to complete a high jump is less than 8 seconds’. That means theyA. rejected the null hypothesisB. failed to reject the null hypothesisWhich of the following is an example of a null hypothesis? a. The thickness of aluminum sheets averages is not .03 inches, as required. b. The average quantity of detergent put into a box by this filling machine is not 1 pound and this shipping company's average delivery time is different from 3 days. c. This industrial process makes windshields with an average length of 33 inches. d. This shipping company's average delivery time is different from 3 days. e. The average quantity of detergent put into a box by this filling machine is not 1 pound.A. Express the null hypothesis H0 and the alternative hypothesis Ha in notation form in the following scenarios. 1. The mean annual income of workers who are college graduates is greater than Php100,000 a year. 2. The percentage of women who watches sports on TV is not 40% as claimed by a researcher. 3. A random sample of 60 working students was taken in order to determine whether the average age of working students is different from 19 years.
- A medical researcher wants to examine the relationship of the blood pressure of patients before and after a procedure. She takes a sample of people and measures their blood pressure before undergoing the procedure. Afterwards, she takes the same sample of people and measures their blood pressure again. The researcher wants to test if the blood pressure measurements after the procedure are different from the blood pressure measurements before the procedure. The hypotheses are as follows: Null Hypothesis: μD = 0, Alternative Hypothesis: μD ≠ 0. From her data, the researcher calculates a p-value of 0.5704. What is the appropriate conclusion? The difference was calculated as (after - before). Question 16 options: 1) The average difference in blood pressure is significantly different from 0. The blood pressures of patients differ significantly before and after the procedure. 2) We did not find enough evidence to say the average…A company selling home furnaces claims that installingtheir new high efficiency furnace will “cut your heating bill in half.” A consumer agency collects data for a ran-dom sample of homes and plots this year’s heating costs with the new furnaces against previous costs with the oldfurnaces. Which are the most appropriate hypotheses totest the company’s claim?A) H0: b = 0, HA: b ≠ 0B) H0: b = 0, HA: b 7 0C) H0: b = 0, HA: b 6 0D) H0: b = 0, HA: b 6 0.5E) H0: b = 0.5, HA: b ≠ 0.5A car manufacturer claims that its latest model can average 60 miles per gallon on the highway - and an auto magazine's editor wants to put that claim to the test. (a) Write the null hypothesis for this situation. (b) Write the alternate hypothesis, if the editor wants to prove that the actual miles per gallon is lower than what's being claimed. (c) Write the alternate hypothesis, if the editor wants to prove that the actual miles per gallon is simply different from what's being claimed.
- Past records from a local hospital stated that the proportion of full-term babies born in the hospital who weigh less than seven pounds is 43%. Suppose that we have strong reason to believe the proportion is greater than 43%, and we wish to carry out a hypothesis test. State the null hypothesis H0 and the alternative hypothesis H1 that we would use for this test. H0: H1:You may need to use the appropriate technology to answer this question. Suppose a certain state university's college of business obtained the following results on the salaries of a recent graduating class: Finance Majors Business Analytics Majors n1 = 140 n2 = 30 x1 = $48,337 x2 = $55,217 s1 = $19,000 s2 = $10,000 (a) Formulate hypotheses so that, if the null hypothesis is rejected, we can conclude that salaries for Finance majors are significantly lower than the salaries of Business Analytics majors. Use ? = 0.05. (Let ?1 = the population mean salary for Finance majors, and let ?2 = the population mean salary for Business Analytics majors. Enter != for ≠ as needed.) H0: Ha: (b) What is the value of the test statistic? (Use ?1 − ?2. Round your answer to three decimal places.) (c) What is the p-value? (Round your answer to four decimal places.) p-value = (d) What is your conclusion? Do not reject H0. We cannot conclude that…You may need to use the appropriate technology to answer this question. Suppose a certain state university's college of business obtained the following results on the salaries of a recent graduating class: Finance Majors Business Analytics Majors n1 = 120 n2 = 30 x1 = $48,237 x2 = $55,217 s1 = $19,000 s2 = $10,000 (a) Formulate hypotheses so that, if the null hypothesis is rejected, we can conclude that salaries for Finance majors are significantly lower than the salaries of Business Analytics majors. Use ? = 0.05. (Let ?1 = the population mean salary for Finance majors, and let ?2 = the population mean salary for Business Analytics majors. Enter != for ≠ as needed.) H0: Ha: (b) What is the value of the test statistic? (Use ?1 − ?2. Round your answer to three decimal places.) (c) What is the p-value? (Round your answer to four decimal places.) p-value = (d) What is your conclusion? Do not reject H0. We cannot conclude that salaries…