In a study of academic procrastination, the authors of a paper reported that for a sample of 431 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.24 hours and the standard deviation of study times was 3.50 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university.

(a) Construct a 95% confidence interval to estimate μ, the mean time spent studying for the final exam for students taking introductory psychology at this university. (Round your answers to three decimal places.)

(b) The paper also gave the following sample statistics for the percentage of study time that occurred in the 24 hours prior to the exam.

n = 431      x = 43.18      s = 21.26

Construct a 90% confidence interval for the mean percentage of study time that occurs in the 24 hours prior to the exam. (Round your answers to three decimal places.)
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In a study of academic procrastination, the authors of a paper reported that for a sample of 481 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.54 hours and the standard deviation of study times was 3.80 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university.

(a) Construct a 95% confidence interval to estimate μ, the mean time spent studying for the final exam for students taking introductory psychology at this university. (Round your answers to three decimal places.)

(b) The paper also gave the following sample statistics for the percentage of study time that occurred in the 24 hours prior to the exam.

n = 481      x = 43.78      s = 21.46

Construct a 90% confidence interval for the mean percentage of study time that occurs in the 24 hours prior to the exam. (Round your answers to three decimal places.)

In a study of academic procrastination, the authors of a paper reported that for a sample of 441 undergraduate students at a midsize public university preparing for a final exam in an introductory psychology course, the mean time spent studying for the exam was 7.74 hours and the standard deviation of study times was 3.40 hours. For purposes of this exercise, assume that it is reasonable to regard this sample as representative of students taking introductory psychology at this university.

a) Construct a 95% confidence interval to estimate μ, the mean time spent studying for the final exam for students taking introductory psychology at this university. (Round your answers to three decimal places.)

(__________ , __________ )

b) The paper also gave the following sample statistics for the percentage of study time that occurred in the 24 hours prior to the exam.

n = 441      x = 43.78      s = 21.46

Construct a 90% confidence interval for the mean percentage of study time that occurs in the 24 hours prior to the exam. (Round your answers to three decimal places.)

(_________ , _________ )

Please show your answer and a draw the graphs.

A radar unit is used to measure speeds of cars on a motorway. The speeds are normally distributed with a mean of 90 km/hr and a standard deviation of 10 km/hr. What is the probability that a car picked at random is travelling at more than 100 km/hr?

For a certain type of computers, the length of time bewteen charges of the battery is normally distributed with a mean of 50 hours and a standard deviation of 15 hours. John owns one of these computers and wants to know the probability that the length of time will be between 50 and 70 hours.

Entry to a certain University is determined by a national test. The scores on this test are normally distributed with a mean of 500 and a standard deviation of 100. Tom wants to be admitted to this university and he knows that he must score better than at least 70% of the students who took the test. Tom takes the test and scores 585. Will he be admitted to this university?

please answer all parts of question, thank you so much

12. Identify the correct statements. Fix the incorrect ones.

a. A sampling distribution describes the distribution of data values.

b. A sampling distribution shows the behavior of a sampling process over many samples.

c. The probability distribution of a parameter is called a sampling distribution.

d. Sampling distributions describe the values of a data summary for many samples.

14. 14. Why is random sampling important?

18. A large university wants to send an exit survey to a SRS of 500 of its 3,827 graduating seniors. One question is, “Would you recommend to others that they should attend the university?” The response choices are: not sure, not likely, likely, definitely, most definitely. Describe how you would (in theory) use repeated sampling to obtain the sampling distribution of the sample proportion who would “definitely” or “most definitely” recommend the university to others.

A confidence interval, at the 95% confidence level, will be used to answer the question, "What is the mean annual salary (in US dollars) of a Tesla car owner?"  Data was collected from 36 Tesla owners across the US. The mean annual salary of those 36 Tesla owners was $254000.  The standard deviation of ALL Tesla owners is known to be $1057.

a)  The value at the center of the confidence interval represents what quantity?  Choose an option from the list and type its corresponding letter in the box.  

1. sample size
2. population mean
3. sample mean
4. standard deviation

Answer for (a):

b)  Is z* or t* used when building this confidence interval?  Choose an option from the list and type its corresponding letter (A or B) in the box.

1. z*
2. t*

Answer for (b):

A confidence interval, at the 95% confidence level, will be used to answer the question, "What is the mean annual salary (in US dollars) of a Tesla car owner?"  Data was collected from 36 Tesla owners across the US. The mean annual salary of those 36 Tesla owners was $254000.  The standard deviation of ALL Tesla owners is known to be $1057.

a)  The value at the center of the confidence interval represents what quantity?  Choose an option from the list and type its corresponding letter in the box.  

1. sample size
2. population mean
3. sample mean
4. standard deviation

Answer for (a):  

b)  Is z* or t* used when building this confidence interval?  Choose an option from the list and type its corresponding letter (A or B) in the box.

1. z*
2. t*

Answer for (b):  

c) Determine the value of the letter indicated in part (b) using one of the following tables:  normal table, t table. Type the number, recorded to 3 decimals, in the box.

Answers for (c):

d) What are the lower and upper bounds of this confidence interval?   Type the numbers, rounded to 2 decimals, in their corresponding boxes.

Answers for (d): Lower Bound - ? Upper Bound - ?

e) If the sample size is decreased to 20 Tesla owners, what would happen to the confidence interval?   Choose an option and write its corresponding letter the blank below.

1. It narrows.
2. It widens.
3. It does not change.

Answer for (e): ?

Would the following groups benefit if the US dollar appreciated? Yes or No. Explain.

1. Dutch pension funds holding US government bonds.

2. US manufacturing industries.

3. Australian tourists planning a trip to the US.

4. An American firm trying to purchase property overseas.

5. American tourists planning a trip to London.

The start-up ecosystem in Beirut is an early to middle stage ecosystems, that has passed its early growth phase but is still far from maturity. On average, each year, 12 more start-ups are created than in the previous year, resulting in a 24% growth rate in start-up creation since 2009. A new IT-based start-up will start operating in Beirut beginning July 2020. KM seems to be part of their main business objectives as they are incorporating it in their mission and vision statements. The co-founders believe that knowledge is the main resource a business can possess. Hence, they plan to invest largely in KM systems starting the second year. The value of investors in the startup ecosystem in Beirut extends beyond the money they provide. They also act as mentors supporting the needs of the entrepreneurs, trying to fill the gaps start-ups have whether in staff, research, and infrastructure. As the new startup is now in the process of building prototypes of drones that can predict the speed of hurricanes, their investors have suggested adopting a KM system that highlights discrepancies between the observed and predicted speed of hurricanes. More than that, they believe it might be useful to analyze the effectiveness of the developed drones by comparing it to sensory equipment used in hospitals. This has been suggested due to the shortage of experience in their domain. In fact, the founder suggested that building a sort of repository for cases they encounter could prove to be highly essential to build and sustain expertise. This repository can either be added to a system they might purchase in the future, or can be employed by the start-up as an informal approach for knowledge application.
1. Infer two KM systems the start-up plans to adopt starting in the second year of their operation. Explain the systems. (20 points)

2. Explain a methodology the start-up can apply to build and sustain their repository of cases.
(20 points)

3. Explain through the use of examples the impact of KM systems they plan to adopt on processes and people in the start-up. Explain two impacts for each (i.e. two impacts on processes and two impact on people). (30 points)

4. Suggest two mechanisms and two technologies that can facilitate the KM systems they plan to adopt. Justify your answers. (30 points)

We have reviewed the topic of Goodwill on the Balance Sheet which is created when a company acquires another and pays more than the market value of the acquired company's net assets.

What I want you to address in this discussion board are the following:

A. What type of "event" results in goodwill being recorded on a company's balance sheet?

B. How is goodwill evaluated to determine whether this specific asset is impaired? If it is deemed to be impaired, what actions does a company need to take?

C. How do you view goodwill on the balance sheet - specifically, if certain levels of it would cause concern, identify what level of goodwill would cause you concern and why?

D. If it would not concern you regardless of the amount of goodwill on the balance sheet, explain why.