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DECISION |
H0 is false |
H0 is true |
Reject H0 |
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Fail to Reject H0 |
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- A student majoring in Management who has passed the Business Statistics course suspects that the average price of lunch at the canteen has increased during the pandemic. Before the pandemic, the price for lunch he paid was $21, $22, $22.50, $23, $23.50. After the pandemic, he paid $25, $25.50, $30, $27, and $26.50. a) Perform a hypothesis test analysis to find out whether there has been an average increase in the price of lunch (Use six Hypothesis Testing Steps) ! b) Interpret (and explain) the results of point a above!Explain the meaning of each of the following in the context of hypothesis testing. a. α b. β c. 1 − βThis type of error in hypothesis testing is also known as a “false positive” result.A. Type IB. Type AC. Type IID. Type B
- A hypothesis test is conducted in order to determine the average weight of a Kit Kat bar.using the following null and alternative hypotheses: H0: The average weight of a Kit Kat bar is 1.5 ounces. HA: The average weight of a Kit Kat bar is greater than 1.5 ounces. Using complete sentences, explain what both a Type 1 and Type 2 error would be in context of this hypothesis test.A plumber was interested in determining whether there is a significant difference in the price charged for plumbing tools by two hardware stores. The plumber selected five tools and recorded the price for each tool in each store. The following data was recorded: Store 1 2 Tool 2 R59.25 R22.50 R450 R44.25 R22.50 R36.75 R75 4 R480 R44.25 R60 Perform the appropriate test of hypothesis to determine whether there is a significant difference, on average, in the price of plumbing tools between the two stores, showing all 7 steps. Include both the rejection region and the p-value.Researchers wanted to know if therapy could help smokers quit smoking. Of the 71 smokers they tested, 39 were smoking one year after treatment. Use a 0.05 significance level to test the claim that the majority are smoking one year after treatment. Identify the null and alternate hypotheses using mathematical symbols. ABC T TT Arial 3 (12pt) T 只i ン Click Save and Submit to save and submit. Click Save All Answers to save all answers.
- Answer for this multiple choice questionAccording to a report done last year by the dental industry, 81% of dentists would recommend Starry Whites toothpaste. After some recent negative publicity, the sales team at Starry Whites suspects the proportion of dentists who now recommend the brand is lower. The team chooses 150 dentists at random and asks them whether they'd recommend the brand. Of those, 118 say they'd recommend it. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.10 level of significance, to conclude that the proportion, p, of all dentists who now recommend this brand is less than 81%. (a) State the null hypothesis Ho and the alternative hypothesis H, that you would use for the test. ( Ho: Aa O 10 under the assumption that the null hypothesis is true.) Here n is the sample size and p is the population proportion you are testing.b) By using the phrases “correct decision” or “wrong decision”, complete the decision table for hypothesis testing below. Where the decision is wrong, state the type of error committed. DECISION H0 is false H0 is true Reject H0 Fail to Reject H0
- You are driving home one night and must decide if you have enough gas to get home or not. Use the hypotheses below to answer the questions. Ho: My vehicle has enough gas to get home.Ha: My vehicle does not have enough gas to get home. A. A type I error occurs if I conclude (believe) my vehicle does/does not (circle the correct choice) have enough gas to get home, but in fact, my vehicle does / does not (circle the correct choice)have enough gas to get home. B. List one possible consequence that could happen if you made a type I error. C. A type II error occurs if I conclude (believe) my vehicle does / does not (circle the correct choice ) have enough gas to get home, but in fact, my vehicle does / does not (circle the correct choice) have enough gas to get home. D. List one possible consequence that could happen if you made a type Il error. E. Based on the seriousness of the consequences of these two errors, we should set a / B to be less than a /B. Circle the better option for each…A researcher is interested in whether people are more or less likely to enjoy popcorn when they are watching TV versus watching a movie. The researcher recruits 12 participants and randomly assigns them to eat popcorn either while watching T or while watching a movie. Then, the researcher measures now much each participant enjoyed the popcorn on a scale from 1 to 10. The researchers' results are shown below: Using the appropriate hypothesis test and the six steps of hypothesis testing, see what the researcher should conclude about the effect of watching television versus watching a movie on people's enjoyment of popcorn. 1. What is the appropriate test to use ? 2. List the test's assumptions You do NOT have to test the assumptions. 3. What are the null and alternative hypotheses ? 4. Construct a sampling distribution of means representing the null hypothesis. Specify the sampling distribution's mean and standard error 5. Using a two-tailed alpha of .05 (a = .05), determine the…info is given in the pic. HELP ASAP. 11) When using a hypothesis test with a = 0.05 to determine if the there is a differencebetween the two evaluators, what are the critical values for the hypothesis test?A) -1.65 and 1.65B) -1.96 and 1.96C) -2.228 and 2.228D) -2.201 and 2.201E) -2.080 and 2.080 12) When using a hypothesis test with a = 0.05 to determine if the there is a differencebetween the two evaluators, what is the test statistic for the hypothesis test?A) -0.32B) -2.73C) -1.01D) -1.06E) -0.54 13) The categorical variable marital status has the following values: single, married,separated, divorced, and widowed. To include marital status in a multiple regressionmodel, how many indicator variables will be included?A) ThreeB) TwoC) FiveD) OneE) Four