You have set a professional goal to become the head of your workplace’s Party Planning Committee. Your CEO has agreed that the role will be yours if you can inspire your team to create enough workplace goodwill that more than 60% of this year’s Holiday Party attendees participate in the ‘ugly sweater’ contest. When you see that 34 of the 47 attendees at the party have on some of the ugliest holiday sweaters you’ve ever seen, you think the new title is yours. However, the next day the CEO comes up to you and says she thinks it was just random chance that so many employees participated in the contest and she is going to hand your committee over to your arch-nemesis, Karen from finance. Claim your new title by proving her wrong!
What type of hypothesis test is required here, is this a left-tailed, right-tailed, or two-tailed test? Verify all assumptions required for this test: State the null and alternate hypotheses for this test: (use correct symbols and format!)
Null hypothesis
Alternate hypothesis
Trending nowThis is a popular solution!
Step by stepSolved in 2 steps
- Read the scenario below to determine which one of the three factors that influence reliability (instrument, group, test administration) is of most concern to the scenario. A, multiple-choice test is developed for use as an end-of-course examination. The students taking the end-of-course exam have very little experience with a multiple-choice exam. The students struggle to understand and complete the items in the allotted time period.arrow_forwardSuppose you were going to conduct a survey of visitors to your campus. You want the survey to be as representative as possible. How would you select the people to survey? Why would that be your best method?arrow_forwardA grocery store is offering a 50% discount off a $4.00 box of cereal. You also have a $1.00 off coupon for the same cereal. Use a composite unction to show whether it is better to use the coupon before or after the store discount.arrow_forward
- A city official would like to know if there is public support for increasing funding for arts programs. To collect data, the city official stands outside a concert hall after a show and surveys every 25th person to exit and asks their opinion about raising funds for the arts. Which of the following describes the population in this scenario? all residents of the city the members of the city council all city residents who support the arts the people surveyed by the city officialarrow_forwardMrs. Jen and Miss Berry, two 4th grade teachers, didn’t want to be outdone by Raskin and Bobbins, so they challenged them to fill in the remaining data below about their 4th grade classes and their students’ ice cream preferences. See if you can fill in all of the missing pieces in the diagrams below. For these students as well, they had to choose one topping, but could not choose both.arrow_forwardA report just came out that stated that 21.2% of all Americans say that vanilla is their favorite ice cream, 21.9% say that chocolate is their favorite, 8.6% favor butter pecan, 9.2% favor strawberry, and the rest have other favorites. An ice cream shop owner thinks that her customers are not like the rest of America. The table below shows the results of 905 of her patrons' ice cream selections. What can be concluded at the αα = 0.01 significance level? Complete the table by filling in the expected frequencies. Round your answers to the nearest whole number. Outcome Frequency Expected Frequency Vanilla 188 Chocolate 186 Butter Pecan 97 Strawberry 68 Other 366 What is the correct statistical test to use? Paired Test, Goodness-of-fit, homogeneity, or independence. What are the null and alternative hypotheses?H0:H0: Favorite ice cream and where the ice cream is purchased are dependent. The distribution of favorite ice cream for customers at her…arrow_forward
- The owner of a popular coffee shop wants to determine if there is a difference between the proportion of customers who use their own cups when they purchase a coffee beverage, and the proportion of customers who use their own cups when they purchase an espresso beverage. Customers using their own cups get a 5% discount, which is displayed on the receipt. The owner randomly selects 50 receipts from all coffee purchases and 50 receipts from all espresso purchases. For coffee purchases, 24 receipts showed that the customer used their own cup. For espresso purchases, 18 receipts showed that the customer used their own cup. Assuming the conditions for inference have been met, what is the 99% confidence interval for the difference in proportion of customers who use their own cups? Find the z-table here. O (0.48 - 0.36) ±2.58/ 0.48(1–0.48) , 0.36(1–0.36) 50 50 0.48(1-0.48) 0.36(1-0.36) (0.48 - 0.36) ±2.33/ 50 50 O (0.52 - 0.64)±2.58 0.52(1-0.52) 0.64(1-0.64) + 100 100 0.52(1-0.52) ,…arrow_forwardA report just came out that stated that 24.4% of all Americans say that vanilla is their favorite ice cream, 22.7% say that chocolate is their favorite, 8.4% favor butter pecan, 9.1% favor strawberry, and the rest have other favorites. An ice cream shop owner thinks that her customers are not like the rest of America. The table below shows the results of 995 of her patrons' ice cream selections. What can be concluded at the αα = 0.05 significance level? Complete the table by filling in the expected frequencies. Round your answers to the nearest whole number. Outcome Frequency Expected Frequency Vanilla 248 Chocolate 230 Butter Pecan 79 Strawberry 101 Other 337 The degrees of freedom = _____ The test-statistic for this data = _____ (Please show your answer to three decimal places.) The p-value for this sample = _____(Please show your answer to four decimal places.)arrow_forwardA report just came out that stated that 21.3% of all Americans say that vanilla is their favorite ice cream, 23.1% say that chocolate is their favorite, 9.1% favor butter pecan, 10% favor strawberry, and the rest have other favorites. An ice cream shop owner thinks that her customers are not like the rest of America. The table below shows the results of 905 of her patrons' ice cream selections. What can be concluded at the a = 0.05 significance level? a. Complete the table by filling in the expected frequencies. Round your answers to the nearest whole number. Frequencies of Favorite Ice Cream Frequency Expected Frequency Outcome Vanilla 172 Chocolate 195 Butter Pecan 75 Strawberry 86 Other 377 b. What is the correct statistical test to use? Select an answer c. What are the null and alternative hypotheses? Но: Favorite ice cream and where the ice cream is purchased are independent. Favorite ice cream and where the ice cream is purchased are dependent. The distribution of favorite ice…arrow_forward
- An online university wants to invest in a new tutoring program. Before they make the commitment, the research team wants to know how many students enrolled in the university would actually use the tutoring program. They decided to conduct a survey to find out. The institution has 4,000 undergraduate students. Marshall surveyed 120 people in the drama club. What do you think of Marshall’s survey? Explain your answer. Morgan added a survey to the university’s website. Any student could click on the survey and fill it out. The survey was closed once the university received 300 responses. What do you think of Morgan’s survey? Explain your answer.arrow_forwardA retailer wants to see if a red "Sale" sign brings in more revenue than the same "Sale" sign in blue. The data below shows the revenue in thousands of dollars that was achieved for various days when the retailer decided to put the red "Sale" sign up and days when the retailer decided to put the blue "Sale" sign up. Red: 2.7, 2.6, 1.1, 4.2, 2.6, 3.4, 2.3, 2.9, 4, 2.6 Blue: 2.2, 1, 2.8, 1.6, 0.6, 0.9, 1, 1.7, 3.4 Assume that both populations follow a normal distribution. What can be concluded at the a = 0.01 level of significance level of significance? b. The test statistic t î = (please show your answer to 3 decimal places.) c. The p-value = (Please show your answer to 4 decimal places.)arrow_forwardA report just came out that stated that 22.9% of all Americans say that vanilla is their favorite ice cream, 23.3% say that chocolate is their favorite, 9.2% favor butter pecan, 8.9% favor strawberry, and the rest have other favorites. An ice cream shop owner thinks that her customers are not like the rest of America. The table below shows the results of 935 of her patrons' ice cream selections. What can be concluded at the αα = 0.01 significance level? Complete the table by filling in the expected frequencies. Round your answers to the nearest whole number.Frequencies of Favorite Ice Cream Outcome Frequency Expected Frequency Vanilla 224 Chocolate 228 Butter Pecan 84 Strawberry 70 Other 329 What is the correct statistical test to use?Select an answer Goodness-of-Fit Independence Paired t-test Homogeneity What are the null and alternative hypotheses?H0:H0: Favorite ice cream and where the ice cream is purchased are independent. The distribution…arrow_forward
- MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons IncProbability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage LearningStatistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
- Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSONThe Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. FreemanIntroduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman