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- Which statement below is true? It is possible for a distribution of scores to have two means. It is possible for a distribution of scores to have two means or two medians. It is possible for a distribution of scores to have two modes. It is possible for a distribution of scores to have two medians or two modes.Helena gathers data about the music preferences of users of a social media application. She gathers information on music events (MEs). In her study, a music event is defined as a posting that has a hashtag or is linked to other video- sharing websites. 1. From her data, Helena claims that about 15% of MEs on the application are hip hop/rap. Juan wants more proof of her claim. • Juan uses technology to determine the genres of music of 100 MEs he chooses at random. He determines that 9 were hip hop/rap. • Juan points out the 9% rate to Helena. Part A Assume Helena is correct and 15% of MEs on the app are hip hop/rap. Use random numbers and a simulated sampling distribution to simulate the outcome of several trials, in which each trial samples 100 MEs from the app and counts the number of hip hop/rap MEs. Make a histogram for your data. Is the model consistent with what you would expect? Explain.6. Chelsea has been offered two jobs. Her pay rate at either job will be determined by how well she does on a test. At Company A, she has an 80% chance of getting a pay rate of $12 and a 20% chance of getting a pay rate of $15 an hour. At Company B, she has a 60% chance of getting a pay rate of $10 an hour and a 40% chance of getting a pay rate of $15 an hour. At which company is she more likely to get a higher pay rate? Explain.
- 4. In a survey of families in which both parents work, one of the questions asked was, “Have you refused a job, promotion, or transfer because it would mean less time with your family?" 29% of the 205 men asked this question responded yes, while 24% of the 211 women asked responded Test the claim that a greater proportion of men have refused a job, promotion, or transfer yes. because it would mean less time with their family.A law firm is evaluating the delivery time of two courier delivery services in Cape Town. They believe that there is a difference between the average delivery times for the two courier services. To investigate this matter further, the firm decides to use both courier services daily over a two month period for deliveries to similar destinations. The delivery times for each courier service are recorded over the two month period. It is found that Courier 1 was used by the firm 12 times and their average delivery time was 43 minutes with of standard deviation of 12 minutes. Courier 2 was used 15 times, and their average delivery time was 36 minutes with a standard deviation of 8 minutes. Construct a 95% confidence interval for the difference in the true mean delivery times for Courier 1 and Courier 2 (rounded off to two decimals).To that end let X and Y to be two variables and suppose we have collected data on both of them from an underlying population: X1. X2......Xn V₁, V2, ... Yn Two-way table can be constructed in three different cases. Obs Gender 1 2 3 4 EX: We have collected data on Salary, Education, Gender, and Working Hours from all 10 employees. of a Tech company in Kabul. Education Salary 5 6 7 8 9 10 M M F F F M M M M M HS BA PowerPoint Slide Show- (BivarPart1.pptx)]-PowerPoint Bivariate Analysis: Two way Table Two way Table: 3: Working hrs and Salary: MA MA PHD MA BA BA HS BA 10 20 30 35 50 38 25 23 15 26 Working Hrs 6 8 9 9 10 9 8 7 6 7 Whr8 Total Sal 20 2 0 0 2 [20-30) 0 4 0 4 Sal> 30 0 0 4 4 Total 2 4 4 10 Fr(Whr =30)= 4 MULTIPLE CHOICE QUESTION 0 Rewatch Submit
- A client wants to determine whether there is a significant difference in the time required to complete a program evaluation with the three different methods that are in common use. Suppose the times (in hours) required for each of 18 evaluators to conduct a program evaluation follow. Method 1 Method 2 Method 3 65 64 55 72 71 68 69 79 66 77 65 58 78 74 56 74 70 64 Use ? = 0.05 and test to see whether there is a significant difference in the time required by the three methods. State the null and alternative hypotheses. 1. H0: All populations of times are identical. Ha: Not all populations of times are identical. 2. H0: Median1 ≠ Median2 ≠ Median3 Ha: Median1 = Median2 = Median3 3. H0: Median1 = Median2 = Median3 Ha: Median1 > Median2 > Median3 4. H0: Median1 = Median2 = Median3 Ha: Median1 ≠ Median2 ≠ Median3 5 .H0: Not all populations of times are identical. Ha: All populations of times are identical. Find the value of the test statistic.…Hello. Could anyone help me on this question? I have tried it four times and only one attempt left. What I am confusing is that some choice are not individual and variables. Like all young children, children who eat snack and cartoon characters. But if i leave them there, it shows me I am wrong. Pls help me on this and explanation would be appreciated. Thanks!A researcher's survey results indicate that about 50% of 12th graders consume less than 300g of vegetables at lunch, about 40% consume 300-600g, and only 10% of them consume more than 600g. A high school conducted a survey of student diets and health information, and reported data about 12th graders' vegetable intake at lunch is reported in the table photo. If researchers wants to find out whether the high school has the same proportions of 12th graders in the vegetable intake categories as reported by the survey, what would the appropiate test statistic be to use and why. Choosing between an ANOVA, Chi -Square independence tests, Chi Square Goodness of Fit, and One sample proportion test?
- 2. A leading researcher in the study of interstate highway accidents proposes that a major cause of many collisions on the interstates is not the speed of the vehicles but rather the difference in speeds of the vehicles. When some vehicles are traveling slowly while other vehicles are traveling at speeds greatly in excess of the speed limit, the faster-moving vehicles may have to change lanes quickly, which can increase the chance of an accident. Thus, when there is a large variation in the speeds of the vehicles in a given location on the interstate, there may be a larger number of accidents than when the traffic is moving at a more uniform speed. The researcher believes that when the standard deviation in speed of vehicles exceeds 10 mph, the rate of accidents is greatly increased. During a 1-hour period of time, a random sample of 50 vehicles is selected from a section of an interstate known to have a high rate of accidents, and their speeds are recorded using a radar gun. The data…A company manufactures shoes in three different factories. Factory Omaha Produces 25% of the company's shoes, Factory Chicago produces 60%, and factory Seattle produces 15%. One percent of the shoes produced in Omaha are mislabeled, 0.5 % of the Chicago shoes are mislabeled, and 2% of the Seattle shoes are mislabeled. If you purchase one pair of shoes manufactured by this company and you determine they are mislabeled what is the probability they were made in Omaha?If you set up your study as a block design, the usual convention is to have 1 experimental unit per treatment per block. So if there is 2 treatments there would be 2 experimental units per block? True or False