What is the reliability of the system made of 4 subsystems in series as follows P1=.980 %3D P2 =.998 P3 =.982 P4 =.975
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- Question No. 4: According to the All Pakistan Software Developer Association (APSDA), developers generally spend more than 40 hours each week working on software and web development. The Table 4.1 shows the number of hours worked per week for a sample of 15 Software developers and a sample of 10 Web developers. Table 4.1 Software Developers 56 54 54 49 61 48 58 60 59 53 50 58 55 57 52 Web Developers 47 50 46 47 48 49 46 55 44 42 ---- a) What is the third quartile of spending working hours for Software developers? b) Create a box plot for the number of hours worked for Software developers. c) Create a box plot for the number of hours worked for Web developers. d) Comment on the differences between the box plots for Software & Web developers.Question #1 chpt 10 hypothesis test and H0 and HaQuestion 2 The past records of a supermarket show that its customers spend an average of $65 per visit at this store. Recently the management of the store initiated a promotional campaign according to which each customer receives points based on the total money spent at the store, and these points can be used to buy products at the store. The management expects that as a result of this campaign, the customers should be encouraged to spend more money at the store. To check whether this is true, the manager of the store took a sample of 12 customers who visited the store. The following data give the money (in dollars) spent by these customers at this supermarket during their visits. 88 69 141 28 106 45 32 51 78 54 110 83 Assume that the money spent by all customers at this supermarket has a normal distribution. Using the 5% significance level, can you conclude that the mean amount of money spend by all customers at this supermarket after the campaign was started is more than $65?
- Question #1 A venture capitalist, willing to invest $1,000,000, has three investments to choose from. The first investment, a software company, has a 5% chance of returning $8,000,000 profit, a 30% chance of returning $1,000,000 profit, and a 65% chance of losing the million dollars. The second company, a hardware company, has a 15% chance of returning $3,000,000 profit, a 50% chance of returning $1,000,000 profit, and a 35% chance of losing the million dollars. The third company, a biotech firm, has a 20% chance of returning $7,000,000 profit, a 25% of no profit or loss, and a 55% chance of losing the million dollars. Order the expected values from smallest to largest.question 2 Hiring workers A company payshis skilled workers S15 per hour in his departmentassembly tool. semi-skilled workersin that department they earn S9 per hour To the employeestwo of shipments are paid SIO per hour Because of aincrease in orders, the company needs to contractemploy a total of 70 workers in the departments ofassembly and shipping Will pay a total of $760 per hourto these employees. Because of a contract with the unionlaw, twice as many semi-semi-workers should be employed.lified than skilled workers. How manysemi-skilled workers, skilled workers and employees ofshipments should hire the company? Note: Solve by Inverse-Excel # OF SEMI-SKILLED WORKERS # OF SKILLED WORKERS # OF SHIPPING WORKERSOR 3 A. OH: p= 23.2% B. OH: p= 24.5% C. OH: p < 24.5% D. OH: p= 24.5% AK Teen Birth Rate NV ID UT AZ WY 8 со NM SD NE KS OK IA MO AR WI MI IL IN IN OH MS AL GA, VA PA NC SC FL NY MAZ CT DE MD NH NJ RI VT CDC Suppose that a study of 1000 female teenagers in Atlanta found that 232 of them gave birth in 2016. Given that the population proportion is understood to be p = 0.245, what would be the null hypothesis, H., for this study?