Doaktown Products manufactures fishing equipment for recreational uses. The Miramichi plant produces the company’s two versions of a special reel used for river fishing. The two models are the M-008, a basic reel, and the M-123, a new and improved version. Cost accountants at company headquarters have prepared costs for the two reels for the most recent period. The plant manager is concerned. The cost report does not coincide with her intuition about the relative costs of the two models. She has asked you to review the cost accounting and help her prepare a response to headquarters. Manufacturing overhead is currently assigned to products based on their direct labor costs. For the most recent month, manufacturing overhead was $322,400. During that time, the company produced 14,400 units of the M-008 and 2,300 units of the M-123. The direct costs of production were as follows:

1. Last year, the mean amount spent by customers at a local sandwich shop was $18.50. The shop owner believes that the mean may be higher this year. State the appropriate null and alternate hypotheses.

2. A test is made of H0 : m = 15 versus H1 : m < 15. The true value of m is 13 and H0 is not rejected. Is this a Type I error, a Type II error, or a correct decision?

3. A test is made of H0:m=20versus H1:m>20. The value of the test statistic is z=1.87. Do you reject H0 at the a=0.05level? Do you reject H0 at thea=0.01 level?
a = 0.05 _________

a = 0.01 _________

4. A certain type of calculator battery has a mean lifetime of 120 hours and a standard deviation of s = 12 hours. A company gas developed a new battery and claims it has a longer mean life. A random sample of 500 batteries is tested, and the sample mean lifetime is x = 121 hours. Can you conclude that this new battery has a longer mean life? Use the a= 0.01 level. Provide the null and alternate hypotheses, compute the value of the test statistic, and state a conclusion.

5. In 2012, the mean number of runs scored by both teams in a Minor League Baseball game was 7.72. In 2013, a sample of 32 games yielded a mean number of runs of 7.09 with a standard deviation of 2.85. Perform a hypothesis test to determine whether the mean number of runs in 2013 is less than it was in 2012. Use the a = 0.05 level. Provide the null and alternate hypotheses, compute the value of the test statistic, and state a conclusion.

z = x - m0 sn

Table of critical values:

Hypothesis testing: test statistic for a mean, standard deviation unknown:

t= x-m0 Use Table C with df=n-1for critical values

Problem C. Fill True or False in the blanks for the following statements. True

1) _ __ Operating system defines the ways in which the system resources are used to solve the computing problems of the users.

2) _ _ Operating system (OS) controls and coordinates use of hardware among various applications and users.
3) ______ System daemons are the first programs to be loaded and executed when powering-up or rebooting a computing system.

4) ______ When an OS runs a user process, it can only run it in the user mode and can never transition to the kernel mode.

5) ______ A system call in a user process is typically executed in the kernel mode.
6) ______ Client-server computing and peer-to-peer computing are two different models for distributed computing.

7) ______ When Apple computers switched from PowerPC to Intel x86, virtualization was used to allow applications compiled for PowerPC to run on Intel x86 by translating every PowerPC instruction.

8) ______ Some virtual machine managers (VMMs) need to run on a host operating system while some VMMs directly run on hardware without the need of a separate host operating system.

9) ______ Virtualization supports running multiple the same or different guest operating systems on a single computing system.

10) _____ A cloud computing environment can only include traditional OSes and VMMs.
11) ______ Real-time OSes have no fixed time constraints.

12) ______ A process control block includes information associated with a process such as process state, the values of program counter and CPU registers when this process was last executed, CPU scheduling information, memory management information, accounting information, and I/O status information.

13) ______ A PCB is typically implemented as a C structure while a ready queue is typically implemented as a linked list.

Write a program (fortran 90) that calls a subroutine to approximate the derivative of y=sin(x)+2x^2 using a one-sided difference approach fx = (fi-fi-1)/deltaX and a centered difference approach fx = (fi+1-fi-1)/deltaX. The value of the function f and its derivative fx should be evaluated at x=3.75. Your code should print both values tot he screen when it runs.

Two dice are tossed one after the other. What is the conditional probability that the first die is six, given that the sum of the dice is seven?

You are considering two stocks and have determined the following information: Stock A Return Probability of the Return 21 % 50 % 12 10 5 40 Stock B Return Probability of the Return 32 % 10 % 15 60 8 30 Which of the two stocks has the higher expected return? Round your answers to two decimal places. The return on Stock A: % The return on Stock B: % has the higher expected return. Which stock is riskier? Do not round intermediate calculations. Round your answers to two decimal places. Standard deviation of Stock A: Standard deviation of Stock B: is riskier.

In a usability study, two versions (A, B) of a company website were compared with respect to the time it takes to retrieve certain information from the site. One hundred subjects were randomly selected from the population, and 50 subjects were randomly assigned to each version. Sample means and standard deviations of retrieval time for the two versions are provided below.

1. (5) Is there any difference in mean retrieval time between the two sites? Answer this question by carrying out an appropriate 10% hypothesis test, assuming that the population variances are equal. Be sure to include the null and alternative hypotheses, value of the test statistic, p-value, and conclusion in the context of the study.
2. (3) Create a confidence interval for the mean retrieval time between the two sites and use it to test if there is a statistically significant difference between the two sites. Create this confidence interval using an appropriate confidence level to match your significance level in part a). Clearly state your conclusion.

Use ALL the data found in the Excel file for your analysis. Calculate the following:

• Run the descriptive statistics for BMI (Body Mass Index) and SysBP (Systolic Blood Pressure), including graphing a scatter plot of BMI by SysBP.
• Calculate the correlation between BMI and SysBP.
• Calculate the regression with SysBP as the response variable (y) and BMI as the explanatory (sometimes called “Independent”) variable (x). In other words, we want to see how much BMI predicts SysBP. Is there a relationship between weight and blood pressure? Yes, we know there is, so we strongly suspect BMI will significantly predict SysBP. We can better understand this relationship using linear regression

BMI 28 27 33 28 29 24 34 30 36 30 31 30 38 32 27 23 26 38 32 29 26 37 24 27 33 32 33 42 30 27 42 34 24 29 28 35 41 26 35 20 28 27 40 31 45 37 35 45 29 24 28 32 34 31 30 34 30 40 36 41 30 39 36 34 38 36 39 32 28 30 25 39 25 40 21 26 24 24 31 27 29 31 24 39 31 36 21 41 23 33 26 27 26 30 23 35 52 26 35 30 47 27 30 47 23 25 32 39 28 28 35 28 32 32 30 29 32 30 27 35 36 35 44 31 31 34 25 28 29 35 37 27 28 30 24 31 38 26 32 33 31 29 38 30 38 38 36 28 31 43 24 24 31 31 36 26 30 29 35 32 24 34 39 38 35 28 38 37 33 28 25 35 33 38 36 30 28 35 31 26 64 40 32 28 45 29 25 31 34 30 35 29 33 31 22 30 38 29 35 26 41 26 28 32 28 29 27 27 32 38 31 30 27 33 28 38 37 29 25 23 38 27 39 20 29 29 25 28 39 31 35 31 39 40 30 29 37 31 33 34 25 24 42 23 42 26 34 38 38 44 26 32 30 24 31 30 24 30 31 26 42 27 24 27 28 30 24 22 28 32 44 25 31 25 24 36 27 32 25 33 28 30 33 34 36 30 30 40 29 39 27 27 31 27 36 35 23 27 24 32 24 30 29 32 29 40 31 43 36 40 33 35 38 26 28 34 47 33 25 31 34 34 30 33 33 24 28 34 29 29 35 25 40 35 29 28 31 42 38 41 27 37 38 33 40 33 32 30 41 27 25 27 34 32 39 24 32 35 24 32 31 29 33 30 32 30 26 28 31 30 27 34 23 41 30 45 25 30 30 24 38 36 44 31 30 36 47

SysBP 128 108 108 138 118 114 132 110 162 144 142 158 126 128 114 116 134 122 150 138 134 110 138 118 124 158 114 120 110 100 142 109 108 124 118 132 126 118 136 148 122 128 135 140 128 110 108 136 138 126 114 108 152 126 118 120 146 109 136 120 129 120 130 136 130 136 126 112 128 110 122 104 112 138 120 126 122 112 132 122 142 136 122 102 112 110 100 152 125 138 130 118 114 120 142 128 138 124 132 130 152 126 118 154 118 122 115 122 146 146 124 114 134 140 118 100 124 110 124 134 136 138 117 112 112 118 130 128 120 122 142 132 112 128 132 120 144 108 122 128 160 124 150 128 130 150 102 110 126 120 118 130 144 128 168 134 132 136 130 126 128 134 120 100 110 132 155 140 128 112 128 154 114 156 118 142 112 100 143 124 114 132 124 114 120 130 118 98 120 158 118 124 140 124 126 140 122 126 132 116 122 112 108 136 122 124 122 150 128 142 98 126 116 112 114 136 138 142 138 130 122 120 124 108 118 128 122 118 126 136 134 120 136 120 142 118 124 136 134 134 118 114 120 126 120 118 112 110 130 124 108 114 122 113 112 108 108 124 132 108 134 104 122 114 118 114 118 164 116 126 130 120 120 122 132 106 124 142 110 144 136 118 112 128 130 128 120 146 136 124 148 116 132 124 116 136 128 127 120 112 112 130 107 134 118 112 110 164 128 136 108 130 112 122 116 130 126 120 124 120 112 132 118 120 148 118 124 148 140 110 115 114 136 158 122 120 108 134 138 122 130 118 138 118 118 136 118 140 120 108 106 120 120 134 122 112 130 120 112 120 126 120 134 118 130 104 100 120 122 120 96 124 104 112 128 138 100 136 120 118 128 118 128 115 120 132 118

Assume that Kirby owns the PAP discussed in this chapter and reproduced in Appendix A on page 379. His policy has the following limits:

Part A = $100,000

Part B = $5,000

Part C = $100,000

Part D = $1,000 deductible for collision; $500 deductible for other than collision

Assume that each of the events described in the following situations occurs separately. The actual cash value of Kirby’s car is $15,000. You are to calculate the amount Kirby’s insurer will pay in total (i.e., net after any deductibles that Kirby must pay).

1. Kirby negligently collides with a farm tractor. The tractor is traveling on the highway to get from one farm to another. Kirby was at fault. The farmer successfully sues for $90,000 in bodily injury damages and $21,000 in property damage to his tractor. The lawyers charge $10,000 to defend Kirby in court.

2. Kirby’s daughter, Suzy, strikes their home and their second car while learning how to drive. She is sixteen years old and has a learner’s permit. Damage to Kirby’s home is $30,000, and damage to each car is $7,500. Both vehicles are insured with the same policy.

3. Kirby runs a stop sign and collides with a parked car, causing $5,000 of damage to each vehicle.

4. While using his car as a delivery vehicle for a local florist, Kirby is struck by an uninsured motorist. He has $15,000 in medical expenses and lost wages. His car is destroyed as the damage amount is $16,000.

5. Kirby lends his auto to Emma. Emma has her own PAP, with coverage identical to Kirby’s. Emma runs over and injures a famous baseball player who recently signed a three-year, $27 million contract. Emma is sued for $32 million.

6. Kirby borrows his neighbor’s car for a week while the neighbor is on vacation. Unfortunately, Kirby did $5,000 damage to the neighbor’s car while he was driving it by hitting a tree.

7. Kirby hits a deer on Door County Highway A. His car is destroyed.