The National Sleep Foundation used a survey to determine whether hours of sleeping per night are independent of age (Newsweek, January 19, 2004). The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older.

Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use  = .05. Use Table 12.4.

Compute the value of the X2 (Chi2) test statistic (to 2 decimals).????

b) Using the total sample of 500, estimate the percentage of people who sleep less than 6, 6 to 6.9, 7 to 7.9, and 8 or more hours on weeknights (to 1 decimal).

The National Sleep Foundation used a survey to determine whether hours of sleeping per night are independent of age (Newsweek, January 19, 2004). The following show the hours of sleep on weeknights for a sample of individuals age 49 and younger and for a sample of individuals age 50 and older. Hours of Sleep Age Fewer than 6 6 to 6.9 7 to 7.9 8 or more Total 49 or younger 37 58 71 74 240 50 or older 34 60 79 87 260

a.Conduct a test of independence to determine whether the hours of sleep on weeknights are independent of age. Use = .05.

Compute the value of the 2 test statistic (to 2 decimals).

b.Using the total sample of 500, estimate the percentage of people who sleep less than 6, 6 to 6.9, 7 to 7.9, and 8 or more hours on weeknights (to 1 decimal).

Less than 6 hours %

6 to 6.9 hours %

7 to 7.9 hours %

8 or more hours %

Question #2 - Review 'Cars Database'. From this data set develop the following: a. One bivariate regression b. One multiple regression c. Provide an effective chart displaying each of the two regressions. Charts should be presentation ready with effective title and labels. d. Provide a brief description of each of the two regressions (please use a text box in your Excel spreadsheet for your descriptions). Also, be sure to correctly identify and describe your independent and dependent variables, linear equation (answer), R, R square, F statistics, t statistic, other.

c++

Develop a program that validates a password entered by a user. The password must meet the following criteria:

1. Be at least six characters long.
2. Contain at least one uppercase and at least one lowercase letter.
3. Have at least one digit.

Write a program that asks for a password and then verifies that it meets the stated criteria. If it does not, the program should display a message telling the user why and ask for another password. The program should keep asking for the password until the password meets the criteria.

The validation should be done on a separate function called validation, which takes a string variable as parameter and returns an integer. It should return 0 if the password is valid and 1 if it does not match the first criteria, 2 if it does not match the second criteria and 3 if it does not match the third criteria.

For the following data, construct a frequency distribution with six classes.

2. can you look at this and help me

According to a Human Resources report, a worker in the industrial countries spends on average 419 minutes a day on the job. Suppose the standard deviation of time spent on the job is 30 minutes.

a. If the distribution of time spent on the job is approximately bell shaped, between what two times would 68% of the figures be?
enter the lower limit for the interval where 68% of the values would fall  to enter the upper limit for the interval where 68% of the values would fall   

b. If the distribution of time spent on the job is approximately bell shaped, between what two times would 95% of the figures be?
enter the lower limit for the interval where 95% of the values would fall  to enter the upper limit for the interval where 95% of the values would fall   

c. If the distribution of time spent on the job is approximately bell shaped, between what two times would 99.7% of the figures be?
enter the lower limit for the interval where 99.7% of the values would fall  to enter the upper limit for the interval where 99.7% of the values would fall   

d. If the shape of the distribution of times is unknown, approximately what percentage of the times would be between 361 and 477 minutes?
enter percentages rounded to 1 decimal place _________ %  (Round the intermediate values to 3 decimal places. Round your answer to 1 decimal place.)

e. Suppose a worker spent 400 minutes on the job. What would that worker’s z score be, and what would it tell the researcher?
z score = enter the z score rounded to 3 decimal places  (Round your answer to 3 decimal places.)

This worker is in the lower half of workers but within select the distance from the mean one standard deviation of the mean.

In a duopoly market with two identical firms, the market demand curve is: P=50-2Q And the marginal cost and average cost of each firm is constant: AC=MC=2 a. Solve for firm 1’s reaction curve and graph b. Solve for firm 2’s reaction curve and graph c. Solve for each firm’s Q and P in a cournot equilibrium and show on your graph i. What is the profit for each firm?

Assume in USA economy can be divided into two sectors, production and service sectors and 50% of people oldert han 30 within the labor force work in production sector, while only 10% of people younger than 30 within the labor force work in the production sector, while 10% of men and 20% of women within the labor force work in production sector. For both groups, the rest of the workers works in the service sector. (Assume there is no unemployment.)
a) Calculate the DID for young and old people in the USA.
b) Calculate DID for men and women in the USA.
c) What is the percentage of the old people that should switch sectors so that there won’t be any occupational segregation for young and old people in the USA?
d) What is the percentage of the women that need to switch sectors, so that there won’t be any occupational segregation for men and women in the USA?

2. There are two courier firms in the market. Herme’s vans (50 in total) often break down, deadlines are missed and the average cost per vehicle delivery is $80. Athena’s vans (50 in total) are more reliable, they have an excellent record of delivering on time and the average cost per vehicle delivery is $120.

(a) With full information, customers are willing to pay $100 per vehicle delivery for Hermes’s service and $160 per vehicle delivery for Athena’s service. Calculate the profit each firm makes under a full information equilibrium. Illustrate the full information equilibrium. [10 marks]

b) Now assume that buyers are risk neutral and they don’t know the characteristics (that is, the “type”) of the courier company. All they know is that there is a 70% chance they will hire type = Hermes and 30% chance they will hire type = Athena. What is the market outcome with asymmetric information? Calculate the profit/loss for each firm. Illustrate the outcome using the diagram used in part (a) above. [10 marks]

4) There are two charges q1 = 35 μC and q2 = 50 μC placed 0.5 m apart and fixed in place. Where should the charge q3 = 15 μC be placed so that it experiences no force on it?

5) Suppose Earth and the Moon each carried a net negative charge −Q. Approximate both bodies as point masses and point charges. (a) What value of Q is required to balance the gravitational attraction between Earth and the Moon? (b) Does the distance between Earth and the Moon affect your answer? Explain. (c) How many electrons would be needed to produce this charge?

The Ann Company produces two types of rulers, a 25 foot (X1) and a 50 foot (X2). Prices, costs and mix ratios are as follows:

Total fixed costs amount to $62,000 and the tax rate is 45%.

Required:

a. Find the break-even point in dollars of X1 and X2.

b. If Ann Company purchased a piece of equipment that added an additional $3,000 to fixed costs, how many additional units of each product would be needed to break even?