4. Suppose from our class (with 25 students), we find the average GPA is 2.7, with standard deviation
0.4. Regard our class as a random sample from the whole university. Based on the information from our
class, can we believe at significance level 0.05, that the average GPA for all students can be at least 2.8?

2D Car Collision

Car Collision in 2D (c7p50) A 900- kg car collides with a 1400- kg car that was initially at rest at the origin of an x-y coordinate system. After the collision, the lighter car moves at 10.0 km/h in a direction of 35 degrees with respect to the positive x axis. The heavier car moves at 13 km/h at -41 degrees with respect to the positive x axis.

A) What was the initial speed of the lighter car (in km/h)? ____Tries 0/7

B) What was the initial direction (as measured counterclockwise from the x-axis)? ___Tries 0/7

Biochemical Tests crossword puzzle:

Across

5 Anaerobic metabolism
6 Crusty growth on broth
8 Cloudy growth in broth
10 Smooth growth on slant
11 Another name for glucose
13 Hydrolyzed collagen
15 Possible sole carbon source
16 Bacterial movement
17 Test use of milk nutrients (2wds)
20 Hydrolyzes starch
22 Bacteria settled to bottom of broth
23 Milk sugar
27 Test for acetoin
28 Produces clear zones in skim milk agar
29 pH indicator in sugar fermentation tubes (2wds)

Down

1 Produced from tryptophan 2 Group of 4 tests
3 Red when acidic (2wds)
4 Turns SIM black
7 Catalysts secreted by the cell
9 Inverted tube to trap gas
12 Tests for lipase
14 Common liquid medium (2wds)
16 Sticky surface growth on broth
18 Breaking macromolecules with addition of water 19 Snowy appearance in broth culture
21 E. coli produces this from glucose (3wds)
24 Spiky growth on slant
25 Breaks down hydrogen peroxide
26 Product of amino acid degradation

what are legal requirements and ethical issues in capturing and analyzing digital images in health sector

Consider a monopolist with a linear demand curve: q = a − bp, where a;b > 0. It produces at constant marginal cost c and has no fixed cost. Assume that 0 < c < a b.
(a) Find the monopoly price, quantity, and profits. (b) Derive the inverse demand curve P(q). Draw P(q), the MRcurve, and the MC-curve in a diagram. Explain why we need the assumption c < a b. (c) Does it matter that the monopolist sets price instead of quantity? (d) Calculate the deadweight loss of monopoly. (e) A change in b results in two opposing effects on the deadweight loss. Calculate the effect of a change in b on the deadweight loss. (f) Derive the price elasticity of demand η for any price. How does η change with p? (g) Show mathematically as well as graphically that the price elasticity of demand η > 1 at the monopoly price.

At t=0 a grinding wheel has an angular velocity of 27.0 rad/s . It has a constant angular acceleration of 25.0 rad/s2 until a circuit breaker trips at time t = 2.00 s . From then on, it turns through an angle 430 rad as it coasts to a stop at constant angular acceleration.

Through what total angle did the wheel turn between t=0 and the time it stopped?At what time did it stopWhat was its acceleration as it slowed down?

Independent Sample T Test (Student Height)

Open College Student Data

Research Question: Is there a significant difference between genders on average student height?

Record the following:

1)What test will you run to answer this research question? Why?

2)Is Assumption One: Equal Variances met? How do you know?

3)Is Assumption Two: Normality met? How do you know?

4)Is Assumption Three: Independency met? How do you know?

5)What are the means? (Male and Female)

6)Answer the research question. How do you know?

7)Which gender is statistically taller? How do you know?

8)Is there an effect size (Cohen’s D)? If so what is it? How did you arrive at the effect size? Is it small, medium, large or very large? How do you know?

DATA SET

height   gender (1 - male, 2 - female)
67.00   2
72.00   1
61.00   2
71.00   1
65.00   2
67.00   1
69.00   1
75.00   1
62.00   2
61.00   2
64.00   2
64.00   1
70.00   1
63.00   2
64.00   2
63.00   2
65.00   2
71.00   1
72.00   1
68.00   2
75.00   1
67.00   2
69.00   1
67.00   1
64.00   2
64.00   2
70.00   1
64.00   1
70.00   1
72.00   1
64.00   2
71.00   1
67.00   2
63.00   2
69.00   1
68.00   1
64.00   2
70.00   1
71.00   1
72.00   1
60.00   2
65.00   2
72.00   1
63.00   2
75.00   1
71.00   1
65.00   2
69.00   1
63.00   2
67.00   2

Researchers conducted a study to investigate the effectiveness of two different treatments for depression (Lithium or Imipramine). A sample of individuals diagnosed with bipolar depression were divided into three groups - one group received Lithium, one group received Imipramine, and the last group was given a placebo. After a specified length of time, patients are evaluated for a recurrence of depression. Use StatCrunch to conduct a chi-square test to determine if recurrence is related to the treatment prescribed. In StatCrunch, select Stat > Tables > Contingency > With Data. Select one of the variables of interest for the row variable and the second variable as the column variable. Then click Compute.

• Select the appropriate hypotheses:
  • HoHo: recurrence of depression is related to the treatment prescribed
    HaHa: recurrence of depression is not related to the treatment prescribed
  • HoHo: recurrence of depression is not related to the treatment prescribed
    HaHa: recurrence of depression is related to the treatment prescribed
• TS: χ2χ2 =   (round to 4 decimal places)
• probability =    (round to 4 decimal places)
• Conclusion: At the 0.10 level, there Select an answer is is not  significant evidence to conclude recurrence of depression Select an answer is not is  related to the treatment prescribed.

Throwback Question: Suppose we know that the risk of liver cancer among alcoholics without cirrhosis of the liver is 29.8%. A researcher conjectures that the risk of cancer among alcoholics with cirrhosis of the liver is higher. Suppose we sample 81 alcoholics with cirrhosis of the liver and determine 29 have liver cancer. Use this information to answer the following:

1. For each person in the sample, what variable is recorded?
   • number of years diagnosed with cirrhosis
   • level of alcoholism
   • percentage of individuals with liver cancer
   • if the individual has liver cancer
2. Completely describe the sampling distribution for the sample proportion of alcoholics with cirrhosis who have liver cancer when samples of size 81 are selected (assuming there is no difference in occurrence between those with and without cirrhosis).
   • mean: μˆpμp^  =
   • standard deviation: σˆpσp^ =  (round to 4 decimal places)
   • shape: the distribution of the sample proportion is Select an answer not normally distributed normally distributed   
     • Checks: np =  and n(1 - p) =
3. Test the appropriate claim using the data collected at a significance level of 0.10.
   • HoHo : p ? < > = ≠     HaHa : p ? = < > ≠  
   • αα =
   • TS: z =   (round your final answer to 2 decimal places; carry 4 decimal places throughout your calculation)
   • probability =   (round to four decimal places)
   • Decision: Select an answer fail to reject H₀ reject H₀
   • Interpretation:At the 0.10 level, there Select an answer is is not   significant evidence to support the claim that the incidence rate of liver cancer is Select an answer lower higher different than   in alcoholics diagnosed with cirrhosis.

Java only !!! Please write the following method that sorts an ArrayList of numbers: public static void sort(ArrayList < Integer > list)

Prompts user to enter 5 ints stores them into an array list and display them in increasing order

1) A ball is kickedfrom the top of a bridge at a height of 50 m (measured from the surface of the water below) with an initial speed of 30 [m/s] at 22 degrees with respect to the x-axis.

a) Determine the time it takes for the ball to reach its maximum height.

b) Determine the maximum height of the ball (measured from the water below)

c) Determine the speed of the ball at its heighest point on its trajectory

d) Determine the time at which the ball lands/.

e) Where does the ball land? [i.e. Calculate its range]

f) Calculate the velocity of the ball just before it lands[both magnitude and direction]

Define and discuss neo-evolution and the idea of homo evolutis. Take a position regarding the future of human evolution: evolutionary equipoise, traditional biological evolution or neo-evolution and defend it rationally and with reference to evidence..

What is the difference between ultraviolet and visible radiation?

a nonconducting thin spherical shell of radius 6.00 cm has a uniform density of 9.00 nC/m^2.
a. what is the total charge on the shell
b. what is the electric field at a distance of 2.00 cm from the center of the shell?
c. what is the electric field a distance 10.0 cm from the center of the shell.

A saver wants $100,000 after ten years and believes that it is possible to earn an annual rate of 8 percent on invested funds.

a) What amount must be invested each year to accumulate $100,000 if (1) the payments are made at the beginning of each year or (2) they are made at the end of each year?

b) How much must be invested annually if the expected yield is only 5 percent?

Please show step-by-step how to solve within excel

Due to erratic sales of its sole product—a high-capacity battery for laptop computers—PEM, Inc., has been experiencing financial difficulty for some time. The company’s contribution format income statement for the most recent month is given below:

Required:

1. Compute the company’s CM ratio and its break-even point in unit sales and dollar sales.

2. The president believes that a $6,200 increase in the monthly advertising budget, combined with an intensified effort by the sales staff, will result in an $81,000 increase in monthly sales. If the president is right, what will be the increase (decrease) in the company’s monthly net operating income?

3. Refer to the original data. The sales manager is convinced that a 10% reduction in the selling price, combined with an increase of $33,000 in the monthly advertising budget, will double unit sales. If the sales manager is right, what will be the revised net operating income (loss)?

4. Refer to the original data. The Marketing Department thinks that a fancy new package for the laptop computer battery would grow sales. The new package would increase packaging costs by 0.50 cents per unit. Assuming no other changes, how many units would have to be sold each month to attain a target profit of $4,300?

5. Refer to the original data. By automating, the company could reduce variable expenses by $3 per unit. However, fixed expenses would increase by $58,000 each month.

a. Compute the new CM ratio and the new break-even point in unit sales and dollar sales.

b. Assume that the company expects to sell 20,200 units next month. Prepare two contribution format income statements, one assuming that operations are not automated and one assuming that they are. (Show data on a per unit and percentage basis, as well as in total, for each alternative.)

c. Would you recommend that the company automate its operations (Assuming that the company expects to sell 20,200)?