Suppose that in a large population of students, the mean amount of sleep the previous night was μ = 7.15 hours and the standard deviation was σ = 1.5 hours. Consider randomly selected samples of n = 240 students.

(a) What is the value of the mean of the sampling distribution of possible sample means?
Mean =  

(b) Calculate the standard deviation, s.d., of the sampling distribution of possible sample means. (Round your answer to three decimal places.)

s.d.(x)

=

(c) Use the Empirical Rule to find values that fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.)

For 68% of all randomly selected samples of n = 240 students, the mean amount of sleep the previous night will be between  and  hours.

(d) Use the Empirical Rule to fill in the blanks at the end of the following sentence. (Round your answers to three decimal places.)

For 95% of all randomly selected samples of n = 240 students, the mean amount of sleep will be between  and  hours.

Dahl (2000) explained that the United States was and never has been a democracy due to the way the US treats its citizens. What did he mean by that thesis?

Reference

Dahl, R. A. (2000). How democratic is the American Constitution? New Haven, CT: Yale University Press.

subject: political science

Caspian Sea Drinks is considering buying the J-Mix 2000. It will allow them to make and sell more product. The machine cost $1.94 million and create incremental cash flows of $632,011.00 each year for the next five years. The cost of capital is 11.32%. What is the profitability index for the J-Mix 2000?

Direct material cost for equivalent unit is $1.10 and there are 2000 physical units 100% complete with respect to materials. What are the total costs of these 2000 physical units that are 50% complete with respect to conversion and conversion costs are $3.75 per equivalent unit?

a. $4950

b. $5950

c. $6950

d. None of the above

Caspian Sea Drinks is considering buying the J-Mix 2000. It will allow them to make and sell more product. The machine cost $1.58 million and create incremental cash flows of $623,441.00 each year for the next five years. The cost of capital is 10.64%. What is the profitability index for the J-Mix 2000?

Caspian Sea Drinks is considering buying the J-Mix 2000. It will allow them to make and sell more product. The machine cost $1.94 million and create incremental cash flows of $581,620.00 each year for the next five years. The cost of capital is 9.30%. What is the profitability index for the J-Mix 2000?

In one or two sentences, explain what is meant by each of the following terms when working with or designing a database. Primary key , Composite key, One-to-many relationship Data integrity

Accountin Information system

Prepare a 1200 words persuasive essay on this topic:
should advertising on prescription drugs be banned?
use MLA or APA on 3 library/ database sources and 1 credible Internet source. Wikipedia is not an acceptable source

Which of the following statements about database systems is (are) true? (Check all that apply.)

Explain how RAM can be exploited by Big Data databases to increase overall performance.

Explain the differences between the two types of in-memory databases: in-memory database (IMDB) and and in-memory data grid (IMDG)