Persistence diagrams show the behaviour of drivers over the last few years across different companies which operate in the same industry Select one: O True O False
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- Q 7.1 Researchers watched groups of dolphins off the coast of Ireland in 1998 to determine what activities the dolphins partake in at certain times of the day ("Activities of dolphin," 2013). The numbers in table below represent the number of groups of dolphins that were partaking in an activity at certain times of days: Table: Dolphin Activity Activity Period Row Total Morning Noon Afternoon Evening Travel 6 6 14 13 39 Feed 28 4 0 56 88 Social 38 5 9 10 62 Column Total 72 15 23 79 189 Is there enough evidence to show that the activity and the time period are independent for dolphins? Test at the 1% level. (i) Which of the following statements correctly defines the null hypothesis HO? A. the activity for dolphins is independent of the time period B. the activity for dolphins is not independent of the time period C. neither of these statements is correct for HO Enter letter corresponding to correct…Bird species 2010 The Cornell Lab of Ornithologyholds an annual Christmas Bird Count (www.birdsource.org), in which bird watchers at various locations aroundthe country see how many different species of birds theycan spot. Here are some of the counts reported fromsites in Texas during the 2010 event:150 216 177 150 166 156 159 160 164 169 175150 178 183 199 154 164 203 158 231a) Create a stem-and-leaf display of these data.b) Write a brief description of the distribution. Be sureto discuss the overall shape as well as any unusualfeatures.Suppose that we have a data set of college students. This data set includes whether each student graduated with honors and whether the same student went to graduate schools to pursue a PhD degree. Assume that P({Graduate w/ honors} ∩ {Pursusing PhD}) = P({Graduate w/ honors}) x P({Pursuing PhD}) Pursu PhD Not Pursu PhD Total Grad w/ honors x1 x2 0.25 Grad w/o honors x3 x4 0.75 Total 0.20 0.80 What is (x1 + x4) - (x2 + x3) 0.20 0.25 0.30 0.35 What is P({Graduate w/ honors} | {Pursuing PhD})? 0.20 0.25 0.50 0.75
- The table to the right gives the number of male and female workers earning at or below the minimum wage for several age categories. Complete parts (A) through (D) below. Males at Minimum Wage Males below Minimum Wage Females at Minimum Wage Females below Minimum Wage Totals Workers per Age Group (thousands) 16-19 20-24 25+ 391 162 256 198 106 189 375 165 525 260 208 594 1,224 641 1,564 (A) How many males are of age 20-24 and earn below minimum wage? There are males of age 20-24 earning below minimum wage. (Type a whole number.) (B) How many females are of age 20 or older and earn minimum wage? There are a total of (Type a whole number.) There are females of age 20 or older earning minimum wage. (Type a whole number.) (C) How many workers are of age 16-19 or males earning minimum wage? There are workers who are of age 16-19 or are males earning minimum wage. (Type a whole number.) (D) How many workers earn below minimum wage? workers earning below minimum wage. Totals 809 493 1,065…i need help The Always Run Company advertises that its flashlight batteries last longer than batteries made by itscompetitors. We randomly select 5 pairs of batteries from the latest production run of Always Run batteriesand from three of its competitors. When tested in a standard flashlight, the data show how many minuteseach battery pair lasted.Always Run Competitor A Competitor B Competitor C98 94 90 9291 90 86 8797 88 87 9095 91 91 9294 92 91 84 a) What are the null and (nondirectional) alternative hypotheses?b) Calculate SSw and SSbet.c) What are dfbet and dfw?d) Calculate and .e) Conduct the F test with a .05 level of significancQ7.3 Researchers watched groups of dolphins off the coast of Ireland in 1998 to determine what activities the dolphins partake in at certain times of the day ("Activities of dolphin," 2013). The numbers in table below represent the number of groups of dolphins that were partaking in an activity at certain times of days: Table: Dolphin Activity Activity Period Row Total Morning Noon Afternoon Evening Travel 6 6 14 13 39 Feed 28 4 0 56 88 Social 38 5 9 10 62 Column Total 72 15 23 79 189 Is there enough evidence to show that the activity and the time period are independent for dolphins? Test at the 1% level. (v) Using calculator, spreadsheet, or online calculator, determine test statistic: Enter value in decimal form rounded to nearest thousandth. Examples of correctly entered answers: 2.010 0.307 1.600 11.019 Recommended online calculator: Chi-Square Test of Independence…
- ChetanOverbooking is the practice of selling more items than are currently available. Overbooking is common in the travel industry; it allows a vehicle (airline, train, bus, cruise ship, hotel, and so forth) to operate at or near capacity, despite cancellations, no-shows, or late arrivals. Overselling is when more confirmed customers show up to use the vehicle than there is space available. When this happens, at least one customer will be denied the service that they paid for, either voluntarily (sometimes with an incentive provided by the supplier) or involuntarily. This is called getting "bumped." Suppose that for a particular flight, an airline believes that 2% of ticket holders do not make the flight. The jet making the trip holds 189 passengers. If the airline sells 192 tickets, what is the probability that the flight will be oversold and they will have to bump a passenger? Assume that cancellations are independent. Calculate the probabilities that one, two, and three people will be…3. The following table summarizes drink sales at a store over the course of two seasons. Milkshake Coffee Total Summer 48 65 113 Winter 21 53 74 Total 69 118 187 From this data, does the choice of drink appear to be dependent or indenendent of season?
