A gas chromatogram of the organic components of a sample of beer using a column that separates compounds on the basis of their relative boiling points provides a GC trace with several peaks. Two of the smaller peaks, with retention times of 9.56 and 16.23 minutes, are believed to be ethyl acetate and ethyl butyrate, respectively.

a. From the above information, which component of the sample, ethyl acetate or ethyl butyrate, elutes faster? What are the reported boiling points of these two substances?

b. What GC experiment(s) could you perform to confirm the identity of the peaks at 9.56 and 16.23 minutes?

c. Suggest two ways in which you could adjust the conditions of the experiment so as to reduce the retention time for all components in the sample.

Flip all 3 coins 10 times. Each flip place a tally mark next to the number of heads in the following table

For each of the tables on the previous side, make a frequency distribution and a relative distribution

10 Tosses

50 Tosses

100 Tosses

1. Draw a tree Diagram to represent the event of tossing three coins

2. What is the sample space for this event?                        

3. Using the random variable, X, that measures the number of heads when you toss three coins, write the theoretical probability distribution.

4. Write a few sentences that compare and contrast the relative frequencies between the three experiments. Why are they different or similar?

5. Write a few sentences that compare relative frequencies with the theoretical probabilities. Why would they be similar or different? What happens as the number of trials gets bigger?

Complete the data table below with the values you measured in the experiment. Remember to include units and use proper sig figs.

2. How many moles of biodiesel (methyl ester) is produced per mole of triglyceride?

3. What important step does calcium methoxide facilitate? Is the calcium methoxide used up in the synthesis?

4. Complete the data table below with the values you measured in the experiment. Remember to include units and use proper sig figs. Show work for all calculations below the table.

5. Discuss the results of the pH and test for intermediates measurement. Was there a complete synthesis of biodiesel in your reaction? Support your conclusion with evidence from your experiment.

6. Compare and contrast the synthesis of biodiesel with the saponification of fatty acids performed last week. What similarities are there between the reactants? What type of reaction is each? What is the difference between the products?

I'm being ask to design an experiment about enzymes. I'm not sure about how to do that.

To test for the presence of monosaccharides and reducing disaccharide sugars in food, the food sample is dissolved in water, and a small amount of Benedict's reagent is added. The solution should progress in the colors of blue (with no glucose present), green, yellow, orange, red, and then brick red when there is a large amount of glucose present.

Design an experiment where you would determine how quickly Lactaid works to break down milk sugar at different temperatures and pH. Be specific in your description and create illustrations.

answer the questions below

a. What are enzymes?

b. How do enzymes work?

c. What is lactase?

d. What is Lactaid?

e. What is lactose intolerance?

2. Write down how you will perform these experiments? There are two experiments. (1) How does temperature influence Lactaid’s ability to break down lactose (2) How does pH influence Lactaid’s ability to break down lactose? Include illustrations and be very specific and elaborate on why you are doing 3. Write down what you think will happen in each experiment.

Thank you.

Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 25 beginning students of Russian to begin speaking practice immediately and another 25 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(30, 8) distribution and scores for delayed speaking have the N(27, 4) distribution.

(a) What is the sampling distribution of the mean score x in the early speaking group in many repetitions of the experiment? (Round your answers for s to two decimal places.)

What is the sampling distribution of the mean score y in the delayed speaking group?

(b) If the experiment were repeated many times, what would be the sampling distribution of the difference y - x between the mean scores in the two groups? (Round your answer for s to two decimal places.)

(c) What is the probability that the experiment will find (misleadingly) that the mean score for delayed speaking is at least as large as that for early speaking? (Round your answer to four decimal places.)

44. Suppose that you are asked to evaluate the abilities of an individual who claims to have perfect ESP (extrasensory perception). You decide to conduct an experiment to test this ability. You deal one card face down from a regular deck of 52 cards. The subject is then asked to say what the card is. Consider the following hypotheses:

    H0: The subject does not have ESP.

    H1: The subject does have ESP.

    1. (a) What would a Type I error be in this context? (Give your answer in a nonstatistical

       manner.)

    2. (b) What would a Type II error be in this context? (Give your answer in a nonstatistical manner.)

    3. (c) Suppose that you decide to conclude that the individual has ESP if and only if he or she correctly identifies the card. What is the level of significance of this particular decision rule?

    4. (d) What is the chance of a Type II error for the decision rule given in part (c)?

    5. (e) When the experiment is carried out, the individual fails to identify correctly the hidden

       card. What is the p-value?

    6. (f) When the experiment is carried out, the individual correctly identifies the hidden card.

       The p-value is 1 . Is this the chance that the null hypothesis is correct? Explain.

Subject is intro to statistics

Does delaying oral practice hinder learning a foreign language? Researchers randomly assigned 23 beginning students of Russian to begin speaking practice immediately and another 23 to delay speaking for 4 weeks. At the end of the semester both groups took a standard test of comprehension of spoken Russian. Suppose that in the population of all beginning students, the test scores for early speaking vary according to the N(29, 6) distribution and scores for delayed speaking have the N(28, 3) distribution.
(a) What is the sampling distribution of the mean score x in the early speaking group in many repetitions of the experiment? (Round your answers for s to two decimal places.)
Mean   =
1.3

Incorrect: Your answer is incorrect.
s   =

What is the sampling distribution of the mean score y in the delayed speaking group?
Mean   =
s   =

(b) If the experiment were repeated many times, what would be the sampling distribution of the difference y - x between the mean scores in the two groups? (Round your answer for s to two decimal places.)
Mean   =
s   =

(c) What is the probability that the experiment will find (misleadingly) that the mean score for delayed speaking is at least as large as that for early speaking? (Round your answer to four decimal places.)

1. counseling. Based on that document and your knowledge of the change process, please answer the following:

• List the three strategies for which the scientific evidence of efficacy is strong. Briefly describe how a nutrition counselor would go about implementing each of the three strategies.
  
  
• There is strong evidence that one of the strategies is not effective. Which strategy is that and what might explain the lack of efficacy? What are the implications of the findings for counseling and for public health efforts?
  
  
• There is grade two or moderately good evidence supporting the efficacy of social support and goal setting strategies. As a counselor, how would you promote clients’ social support? What types of social support might be useful and what types might actually be counterproductive?
  
  
• List the three strategies for which there is little or no scientific evidence of efficacy. What are the practice implications of no scientific evidence of efficacy? (Please keep in mind that having the scientific evidence that a technique doesn't work is different from not having enough evidence (yet) that it does works.)

5. List the steps to working with a client to set up a behavioral experiment. Use the WOOP approach and include brainstorming.
6. Your client has long history as well as social, cultural, and emotional reasons for drinking copious amounts of sugar-sweetened beverages. She has set a long-term goal to stop drinking sugar sweetened beverages. Write a script showing the questions and techniques you would use to help her set up an experiment to stop drinking sugar sweetened beverages.
7. In the first experiment video, the client wasn’t successful with a seemingly simple experiment. Based on the power point, why was the simple behavior change difficult for the client? How does Kellogg handle her clients’ lack of success?
   
   
8. In the second experiment video, assume the client was successful and you are now following up with him (as his nutrition counselor). Write a hypothetical counseling script showing how you would handle clients’ mostly successful experiments.
   
   
9. Be prepared to answer questions concerning client and counselor roles in the counseling relationship such as which person identifies potential barriers? Which person decides on what goals to set and what experiments to try? Who is responsible for knowing local resources?
   
   
10. What is CBT and how can people revise the way they respond to thoughts?