the following time series dat Quarte Year 11 Time Series Value 2 (a) Construct a time series plot. 22HD987 10 12 Year 2 13 10 12 14 Year 3 14 13 Time Series Value 2543N-C807 12 Time Series Value ==== NOO DOM Time Series Value 1960-NW+54 -
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- Question 17 Not yet answered Marked out of 0.50 P Flag question Mean of n observations say x1, ×2, X3,...,Xn is 5. If a constant term a = 7 is subtracted from each observation then the mean of the resulting observations will be 2. Select one: O True O False PREVIOUS PAGE NEXT PAGEIllustration 19.34. A persón buys 100 electric tubes each of two well-known makes, taken at random from the stocks for testing pur- pose. He finds that make A has a mean life of 1300 hrs with SD=82 hrs, and make B has a mean life of 1248 hrs with SD=93 hrs. Dis- cuss the significance of these results.Question 13 We want to assess the relationship between class rank and how many minutes a person spends on social media. We randomly select 5 students from UMD and have them report their class rank and number of minutes per week they spend on social media. We get the following data. Because class rank is ordinal data, we want to compute Spearman's rho. Please compute the numerator for Spearman's rho and use 4 decimal places for all computations and final answer. Minutes on Social Media per Class Rank Week 2 1,302 200 500 20 250 10 600 32 300 Question 14 We want to assess the relationship between class rank and how many minutes a person spends on social media. We randomly select 5 students from UMD and have them report their class rank and number of minutes per week they spend on social media. We get the following data. Because class rank is ordinal data, we want to compute Spearman's rho and want to rank the scores from least to greatest. What would be the the rank for the bolded value…
- • Question 18 %3D A random sample of 15 song lengths (in minutes) on a playlist found: = 275.6, s = 12.9. Build a 80% Cl for the population mean length of a song on the playlist. Round all intermediate calculations to two decimals, then construct the Cl and enter like this: (min,max). Note: if you use a built-in Cl command on a calculator/computer, you might get marked wrong due to rounding. Use the formulas given in the text/notes. a. Since n < 30, O It is important that song lengths be normally distributed O We use s, not o O We use a T-interval O We use a Z-interval b. The Cl is: octor Submit Question ét 21 MacBook Air 20 F3 O00 000 F4 F1 77 F7 F2 F5 F6 F8 %23 & %24Question 7 According to a study conducted by the budget Council the products and the tax valuations are attributed in a table such that there are 14 rows and 12 columns. We need to perform chi square test analysis after valuations. What could be the degrees of freedom for this analysis.For each of the following variables enter as many of the below descriptions (labelled A thru H) that describe the type of data that is being measured. Although there are 3 blanks available to describe each variable, only insert those letters that apply. If you answer A or B for a particular variable, you don’t need to answer with any other variable. nominal ordinal interval ratio discrete continuous cross-sectional time series _____ _____ _____ the number of aunts and uncles that each of a random sample of 50 students have _____ _____ _____ the temperature (to the nearest degree) that food experts believe a rare steak should be cooked to _____ _____ _____ the school colours of Windsor high schools _____ _____ _____ the exact distance, in kms, a marathon runner ran each of the last 30 days preparing for her next marathon _____ _____ _____ the preferred temperature for sleeping by Canadians (cold, cool, warm, hot) _____ _____ _____ the…
- question 15part d: find the difference in meansQuestion 3 Marquis scored 82 in the class with the mean /5.5 and the standard deviation 5.4, but Rhianna scored 69 in the class with the mean 58.9 and the standard deviation 9.1. Who scored relatively better? (Round the answers to 2 decimal places) Marquis's z-score is Marquis's z-score is Select an answer Select an answer less than greater than the same as and Rhianna's z-score is Rhianna's z-score, we conclude that Select an answer Select an answer Rhianna did relatively better Marquis and Rhianna did relatively the same Marquis did relatively better Since