Determine the lightest section W14 available to carry a service dead load of 150 kips and a service live load of 250 kips. The effective length of the column about both axes is 15 ft. Use A992 steel. (10 points)

Scenario: Imagine you are a researcher who is interested in studying whether sleep deprivation leads to increased reaction times (i.e., being slower) when driving. You randomly select a sample of 30 licensed drivers. Fifteen participants are randomly assigned to get 5 hours of sleep for three consecutive nights. The other 15 participants are randomly assigned to get 8 hours of sleep for three consecutive nights. For the purposes of this Assignment, assume that all participants sleep exactly the required amounts. After the third night, all participants take a driving simulation test that measures their reaction times.

Use SPSS to determine if amount of sleep is related to reaction time.

1. Explain whether the researcher should use an independent-samples t-test or a related-samples t-test for this scenario. Provide a rationale for your decision.
2. Identify the independent variable and dependent variable.
3. Knowing the researcher believes that people who sleep less will have slower reaction times, state the null hypothesis and alternate hypothesis in words (not formulas).
4. Explain whether the researcher should use a one-tailed test or two-tailed test and why.
5. Identify the obtained t value for this data set using SPSS and report it in your answer document.
6. State the degrees of freedom and explain how you calculated it by hand.
7. Identify the p value using SPSS and report it in your answer document.
8. Explain whether the researcher should retain or reject the null hypothesis. Provide a rationale for your decision. Are the results statistically significant?
9. Explain what the researcher can conclude about the relationship between amount of sleep and reaction times.

Data:

Reaction times in seconds for participants with 5 hours of sleep
0.22
0.25
0.27
0.25
0.24
0.28
0.24
0.3
0.25
0.21
0.28
0.23
0.29
0.25
0.29

Reaction times in seconds for participants with 8 hours of sleep
0.21
0.23
0.2
0.24
0.28
0.23
0.3
0.29
0.23
0.21
0.21
0.27
0.29
0.23
0.25

Give the name of cranial nerve X and one of its functions.

Give the name and number of a cranial nerve - other than I, II, VIII, or X - and state one of its functions.

Describe in detail the process of synaptic transmission. Start with the arrival of an action potential at a knob.  Include details regarding an IPSP and an EPSP example in the postsynaptic neuron. Also include clearing the synaptic cleft (gap). Use the back of this page as needed.  You may use drawings and words.

Conduct a SWOT analysis for Korean red ginseng extract from CheongKwanJang and include a summary/explanation of the SWOT for the product as if you were researching the possibility of promoting it to native US consumers. Your “starting” market will be US citizens. Your target market should be much smaller than this.

Use your SWOT analysis and put together S and O to determine actions moving forward to help propel your marketing opportunities. Use W and T to determine what pitfalls you may experience down the road.

1) Analyze and explain the IS* and LM * curves in the small open economy under the fixed and flexible ( floating ) exchange -rate system. Explain in detail the assumptions of the Mundell-Fleming Model, its limitations, and explain what occurs to the models variables as the economy moves from the short term ( when price is fixed) to the long term ( when price is flexible). Include diagrams of the appropriate economic models in your answer.

Explain in detail the purpose, advantages and the effect of using FIFO method on the financial statements in perpetual inventory system. Support your answer with the help of examples of your own.

You cross true breeding blue and red morning glories and get all blue offspring.

a) Based on this information alone:

i) How many loci are involved in the expression of this trait? How many alleles? What are the dominant and recessive interactions between the alleles at the locus/loci?

ii)what are the possible genotypes of the parents and F1s?

iii) Based on your hypothesized genotypes from ii, what do you expect the outcome of a cross between the F1's to be? (i.e. what phenotypes in what ratios?)

b) You then cross the F1 individuals and you obtain the following results

Blue - 200

purple - 126

red - 24

i) Are these results statistically consistent with your hypothesis above?           (prove it!)

ii) If not, what is an alternative hypothesis that might explain these results? Are these results the result of one locus or 2? Test your new hypothesis using chi-squared test. Discuss the meaning of your results. (Note: If your hypothesis proves wrong, that is OK!!! But you have to be able to discuss why you think it's wrong.)

. You cross true breeding blue and red morning glories and get all blue offspring.

a) Based on this information alone:

             i) How many loci are involved in the expression of this trait? How many alleles? What are the dominant and recessive interactions between the alleles at the locus/loci?

             ii)what are the possible genotypes of the parents and F1s?

             iii) Based on your hypothesized genotypes from ii, what do you expect the outcome of a cross between the F1's to be? (i.e. what phenotypes in what ratios?

b) You then cross the F1 individuals and you obtain the following results

Blue - 200

purple - 126

red - 24

             i) Are these results statistically consistent with your hypothesis above? (prove it)

             ii) If not, what is an alternative hypothesis that might explain these results?

             Are these results the result of one locus or 2?

             Test your new hypothesis using chi-squared test. Discuss the meaning of your results. (Note: If your hypothesis proves wrong, that is OK!!! But you have to be able to discuss why you think it's wrong.)

Give a broad idea on the background of Disney company and the importance of unrelated diversification to Disney. Explain in detail in your own words.

Recording times (in minutes) for a sample of Dr. Marion's 33 recordings of Gustav Mahler's 1st Symphony:

55 49 50 52 53 56 55 57 59 52 55 50 50 62 53 58

58 63 51 52 51 54 65 60 57 57 56 54 56 47 48 52

1. Estimate the mean recording time for Mahler’s 1st Symphony.

2. To draw any inferences from these data, what must we assume and why?

3. Find a 95% confidence interval for the mean recording time of all recordings of Mahler’s 1st Symphony.

4. Find a 90% cinfudence interval for Mahler’s 1st Symphony mean recording time. Which of your two intervalis wider, and why?

5. What hypothesis would you use to test that the mean recording time for Mahler’s 1st Symphony is significantly longer than 52 minutes? Define in words any parameters you use in your hypotheses.

6. What test-statistic should you use to test these hyptheses? What is the sampling distribution of this test-statistic if Null H0 is true?

7. Find the P-Value for this test-statistic, state your conclusion, interpret the result, and compare your result to the interval in “a.” for the approximate value α.

8. If your friendly local statistics professor informs you that the σ ≈ 4 for all recordings of Mahler’s 1st Symphony, how does this change your answers in b-g?

• I. What must we assume about our sampling population, and why?

• II. Find a 95% confidence interval for the mean recording time.

• III. Find and compare a 90% confidence interval for the mean recording time.

• IV. What hypothesis would you use to test that the mean recording time for Mahler’s 1st Symphony is significantly longer than 52 minutes

• V. What test-statistic should you use to test these hyptheses?

• VI. What is the sampling distribution of this test-statistic under Null H0?

• VII. Find the P-Value, state, and interpret your conclusions at ∝ = 0.02 .

• VIII. Explain how and why you test results change.

9. Using σ = 4 and your sample mean, estimate the probabilities that:

• I. Mean recording time of the 64 recordings exceeds 55 minutes.

• II. Total recording time of 36 recording exceeds 30 hours.

10. Using σ = 4, how large a sample would we need in order to estimate mean recording time for Mahler’s 1st Symphony to a:

• I. 95% error margin of 3 minutes?

• II. 90% error margin of 2 minutes?

• III. Compare your answers and explain their difference.