Introduction to Business Statistics
7th Edition
ISBN: 9781111792374
Author: WEIERS
Publisher: Cengage Learning
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For each pair of hypotheses that follows, decide whether H₀ and H₁ are set up correctly as the null and alternative hypotheses for a hypothesis test. If so, select “Valid” from the drop-down menu. If not, select “Invalid”.
1
H₀: μ = 130
2
H₀: μ ≠ 210
H₁: μ ≠ 138
H₁: μ = 210
3
H₀: M = 115
4
H₀: µ = 30
H₁: M ≠ 115
H₁: µ ≠ 30
For each pair of hypotheses that follows, decide whether H₀ and H₁ are set up correctly as the null and alternative hypotheses for a hypothesis test. If so, select “Valid” from the drop down menu. If not, select “Invalid”.
1
H₀: μ ≠ 230
2
H₀: M = 50
H₁: μ = 230
H₁: M ≠ 50
3
H₀: μ = 150
4
H₀: µ = 135
H₁: μ ≠ 158
H₁: µ ≠ 135
You evaluate the by assuming that it is true and testing the reasonableness of this assumption by calculating the probability of getting the results if chance alone is operating.
For each pair of hypotheses that follows, decide whether H₀ and H₁ are set up correctly as the null and alternative hypotheses for a hypothesis test. If so, select “Valid” from the drop down menu. If not, select “Invalid”.
1
H₀: M = 165
2
H₀: μ = 39
H₁: M ≠ 165
H₁: μ ≠ 39
3
H₀: μ = 344
4
H₀: µ = 79
H₁: μ ≠ 344
H₁: µ ≠ 86
You always evaluate the results of an experiment by assessing the .
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- Determine the null and alternative hypotheses.A health insurer has determined that the "reasonable and customary" fee for a certain medical procedure is $1200. They suspect that the average fee charged by one particular clinic for this procedure is higher than $1200. The insurer wants to perform a hypothesis test to determine whether their suspicion is correct. Choose the best answer below: A. H0: μ = $1200 HA: μ > $1200 B. H0: μ = $1200 HA: μ < $1200 C. H0: μ > $1200 HA: μ = $1200 D. H0: μ > $1200 HA: μ < $1200 E. H0: μ = $1200 HA: μ ≥ $1200arrow_forwardA. For each of the following pairs of null and alternative hypotheses, determine whether the pair would be appropriate for a hypothesis test. If a pair is deemed inappropriate, explain why. 1. Ho: μ ≥ 10, H1: μ 90, Η1: μ < 90 4. Ho: μ < 75, H1: μ = 85 5. Ho: μ= 58, H1: μ ≤ 58arrow_forwardThe national average SAT score is roughly 1500. We would like to see if the high school seniors who apply to Duke have higher than average SAT scores. We randomly sample 100 applicants' files and record their SAT scores. Which of the following is the correct set of hypotheses for this research question? H0: μ 2 150; HA : μ H National; HA: H Duke H National Ho: H s 1500; HẠ: µ > 1500 Но: и3 1500; НА: 1500arrow_forward
- A USA Today article claims that the proportion of people who believe global warming is a serious issue is 0.67, but given the number of people you've talked to about this same issue, you believe it is less than 0.67. If you conduct a hypothesis test, what will the null and alternative hypotheses be? Question 1 options: 1) HO: p ≤ 0.67HA: p > 0.67 2) HO: p = 0.67HA: p ≠ 0.67 3) HO: p < 0.67HA: p ≥ 0.67 4) HO: p ≥ 0.67HA: p < 0.67 5) HO: p > 0.67HA: p ≤ 0.67arrow_forwardThe null and alternative hypotheses are given. Determine whether the hypothesis test is left-tailed, right-tailed, or two-tailed. What parameter is being tested?A. H and 0 : μ ≥ 7 1.HO : μ < 7B. H and 0 : μ ≤ 5 1.HO : μ > 5C. H and 0 : σ ≤ 10 1.HO : σ > 10C. H and 0 : μ = 3 1.HO : μ ≠ 3D. H and 0 : σ = 8 1.HO : σ ≠ 8arrow_forwardDo the following for the case below. a. State the null and alternative hypotheses for a hypothesis test. b. Describe the two possible outcomes of the test, using the context of the given situation. The governor claims that the percentage of adults over 24 who have graduated from high school is greater than 75%, the national average. What is the null hypothesis? A. The percentage of adults over 24 who have graduated from high school is 75%. B. The percentage of adults over 24 who have graduated from high school is greater than 75%. C. The national average for the percentage of adults over 24 who have graduated from high school is 75%.arrow_forward
- The registrar's office at a university has noticed that a large number of students fail to report a change of address. The registrar decides to take a random sample of 150 students from the current directory of students and determine the number of students with the correct addresses on record. He then uses this information to construct a 95 percent confidence interval. Which of the following statements must be true * O Ninety-five percent of students at this university have the correct address on record. The sample proportion of students at this university with the correct address on record is within the confidence interval. The true proportion of students at this university with the correct addresses on record is within the confidence interval 95 percent of the time. The sample proportion of students at this university with the correct address on record is within the confidence interval 95 percent of the time. The true proportion of students at this university with the correct address…arrow_forwardFor each pair of hypotheses that follows, decide whether H₀ and H₁ are set up correctly as the null and alternative hypotheses for a hypothesis test. If so, select “Valid” from the drop down menu. If not, select “Invalid”. 1 H₀: M = 30 2 H₀: μ = 115 H₁: M ≠ 30 H₁: μ ≠ 115arrow_forwardDo the following for the case below.a. State the null and alternative hypotheses for a hypothesis test.b. Describe the two possible outcomes of the test, using the context of the given situation. The governor claims that the percentage of adults over 21 who have graduated from high school is greater than 87%, the national average.arrow_forward
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