In March last year, Goldman Sachs relaxed its dress code, allowing its bankers to swap their bespoke suits for a more casual look. As the CEO of a large financial services company in South Africa, you wonder whether relaxing your existing dress code will result in an improvement in employee morale. To answer your question, you would like to conduct an experiment. Write an essay in which you discuss how you would go about conducting the experiment.

Structure you essay using the following headings:  Design  Participants  Procedure Maximum 600 words.

The experiment is about whether the concentration of sodium bicarbonate will have an effect or not on the rate of photosynthesis in spinach by recording the time taken by the leaf disks to float in the sodium bicarbonate solution with different concentrations (0.7% and 1.5%) as treatment groups and the distilled water as the control group.

Is it possible for leaf disks to float in thecontrol group (Distilled water)?

Why do you think the leaf disks floated at different times in your trial run?

What are the potential sources of error? How will you troubleshoot these when running your experiment?

On what basis will you determine the number of replicates to be used?

In March last year, Goldman Sachs relaxed its dress code, allowing its bankers to swap their bespoke suits for a more casual look. As the CEO of a large financial services company in South Africa, you wonder whether relaxing your existing dress code will result in an improvement in employee morale. To answer your question, you would like to conduct an experiment. Write an essay in which you discuss how you would go about conducting the experiment.

Structure you essay using the following headings:  Design  Participants  Procedure Maximum 600 words.

What is the reaction A(g) + B(g) + C(g)------------> D(g) Experiment Initial [A] (mol/L) Initial [B] (mol/L) Initial [C] (mol/L) Initial rate (M/s) 1 0.0500 0.0500 0.0100 6.25*^(-3) 2 0.1000 0.0500 0.0100 1.25*^(-2) 3 0.1000 0.1000 0.0100 5*10^(-2) 4 0.0500 0.0500 0.0200 6.25*10^(-3)

1) What is the order with respect to each reactant?

2) Write the rate law

3) Calculate K (using the data from experiment 1)

1. Describe one of the theories presented (such as the law of effect, conditioned reflexes, reinforcement, associated reflexes) to use in an experiment that you will design.

2. How does your chosen theory show roots in mechanism?

3. Take on the role of a behaviorist and pretend that you want to train a behavior into a dog or rabbit, such as laying down when they hear a buzzer, or coming to you when you wear a red shirt. Describe the desired behavior. Design an experiment in which you use this theory to train the behavior into your subject. Try to think more creatively than simply rewarding the animal for engaging in the behavior.

Who hasn't heard about the double-slit experiment? It figures in any book of quantum physics. But there is something no one can explain to me : I understand why the light cannot be described only as a wave, but I do not understand why it cannot be explained only in terms of a particle, having some trajectory, following other laws of phyisics we may not know. Usually, every book in which I have tried to look for an answer considers that if it cannot be described as a classical trajectory (which is clearly the case in this experiment), then it is not a particle, that is, a material point. Could it not be a particle following new laws?

Python 3 Forming Functions

Define and complete the functions described below.
* function name: say_hi
* parameters: none
* returns: N/A
* operation:
just say "hi" when called.
* expected output:

>>> say_hi()
hi

* function name: personal_hi
* parameters: name (string)
* returns: N/A
* operation:
Similar to say_hi, but you should include the name argument in the greeting.
* expected output:

>>> personal_hi("Samantha")
Hi, Samantha

* function name: introduce
* parameters: name1 (string)
name2 (string)
* returns: N/A
* operation:
Here you are simply including the two names in a basic introduction.
* expected output:

>>> introduce("Samantha","Jerome")
Samantha: Hi, my name is Samantha!
Jerome: Hey, Samantha. Nice to meet you. My name is Jerome.

How do you write this code in JavaScript inside the head?

• Prompt the user for their first name.
• Remember you must save the value that the user enters so that you can use that value, therefore the prompt must be in an assignment statement.
• Prompt the user for their last name.
• Have an alert box pop up that contains the first name followed by a space and then the last name followed by a short message that you make up.
• Hint: you will concatenate the value of the variable used to store the first name with a string that contains a space, them the value of the variable that contains the last name and then the string that contains the message. Variable names are not enclosed in quotes – we want the value of the variable, not the name of the variable to appear. Strings are enclosed in quotes,

A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 246246 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related?

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Question: A new vaccination is being used in a laboratory experiment to investigate whether it is effective...

A new vaccination is being used in a laboratory experiment to investigate whether it is effective. There are 246246 subjects in the study. Is there sufficient evidence to determine if vaccination and disease status are related?

A. State the null and alternate hypothesis.
B. Find the expected value for the number of subjects who are vaccinated and are diseased.
C. Find the expected value for the number of subjects who are not vaccinated and are not diseased.
D. Find the value of the test statistic.
E. Find the critical value of the test at the 0.01 level of significance.
F. Make the decision to reject or fail to reject the null hypothesis at the 0.01 level of significance.
G. State the conclusion of the hypothesis test at the 0.01 level of significance.

Post pairs of variables that exhibit positive correlation, negative correlation and no correlation. Could any of the proposed correlated variables be the result of causation? How could an experiment be designed to establish causation? Would it be ethical to do such an experiment? What percentage of the variation in the response variable do you think can be explained by the predictor variable? Do you think there are any lurking variables in your situation?

Sample Student Response

Positive Correlation: rain and the rate the grass grows. Yes there is causation. We could do an experiment to measure the effect or rain on grass growth rate. We can just observe this, but if we want to say causation we need experimentation. I would guess about 75% of the variation in grass growth rate could be explained by the amount of rainfall. Lurking variables might be temperature, fertilizer, sunshine, type of soil...

Negative Correlation: The more I study the less free time I have. Yes there is potential causation. We could design an experiment on this to see if additional studying does reduce free time for people. This may be unethical if it would negatively affect a student’s grade, so it might be best to just do an observational study. I would guess about 50% of the variation in free time could be explained by the amount to study time. Lurking variables might be hours at the workplace, family obligations, sickness, laziness,...

No Correlation: A person’s head circumference and the quantity of text messages a day. The rest of these questions are moot.