How are traits inherited?
1. Dominant/recessive (Mendelian)
2. Incomplete Dominance
3. Codominance
4. Multiple Alleles (ABO blood group)
5. Multiple Genes (including Epistasis)
In: Biology
|
Substrate |
Relative Reaction Rate with AgNO3 |
Relative Reaction Rate with NaI |
|
1-chlorobutane |
4 |
3 |
|
2-chlorobutane |
3 |
2 |
|
2-chloro-2-methylpropane |
1 |
4 |
|
benzyl chloride |
2 |
1 |
|
1-bromobutane |
4 |
3 |
|
2-bromobutane |
3 |
4 |
|
2-bromo-2-methylpropane |
1 |
2 |
|
benzyl bromide |
2 |
1 |
|
1-iodobutane |
2 |
|
|
2-iodobutane |
1 |
2) For the AgNO3 reaction, do you see any pattern between relative reaction rate and substrate structure?
3) For the NaI reaction, do you see any pattern between relative reaction rate and substrate
structure?
4) Using your data, make a table that will allow you to identify the best leaving group for a particular structure (1°, 2°, 3°, benzylic). What was the best leaving group and what was the worst leaving group? Explain your reasoning by referring to your data.
5) Consider the reaction of 2-chlorobutane with AgNO3 versus NaI. Are the reaction rates the same or different? If the reaction rates are d different, do you think they proceed via the same mechanism? Why or why not (use your data to justify this answer)? Do your experimental findings agree with the theory that you have learned in class?
In: Chemistry
DATA: obs sat act 1 979 21 2 1088 23 3 782 18 4 858 23 5 667 15 6 965 22 7 981 24 8 787 15 9 828 17 10 902 19 11 1040 19 12 965 26 13 977 21 14 938 20 15 1034 25 16 1161 26 17 833 17 18 715 16 19 1219 27 20 696 19 21 678 16 22 779 15 23 1309 32 24 613 18 25 810 18 26 966 23 27 966 21 28 1253 31 29 823 17 30 1153 23 31 1048 20 32 1015 26 33 602 11 34 769 17 35 891 20 36 835 18 37 925 18 38 1203 28 39 992 19 40 1007 26 41 978 22 42 903 17 43 1084 30 44 730 17 45 1253 28 46 650 10 47 1138 23 48 845 18 49 870 18 50 1125 27 51 863 15 52 1132 22 53 960 17 54 590 14 55 1181 23 56 774 17 57 1139 26 58 910 20 59 659 14 60 942 20
The SAT and the ACT are the two major standardized tests that
colleges use to evaluate candidates. Most students take just one of
these tests. However, some students take both. The data below gives
the scores of 60 students who did this. How can we relate the two
tests?
(a) Plot the data with SAT on the x axis and ACT on the
y axis. Describe the overall pattern and any unusual
observations.
(b) Find the least-squares regression line and draw it on your
plot. Give the results of the significance test for the slope.
(Round your regression slope and intercept to three decimal places,
your test statistic to two decimal places, and your
P-value to four decimal places.)
| ACT = | + (SAT) |
| t = | |
| P = |
(c) What is the correlation between the two tests? (Round your
answer to three decimal places.)
In: Statistics and Probability
| Year | ||
| Month | 2015 | 2016 |
| 1 | 4825 | 5262 |
| 2 | 4752 | 5435 |
| 3 | 4948 | 5481 |
| 4 | 5041 | 6081 |
| 5 | 5300 | 5936 |
| 6 | 5232 | 5627 |
| 7 | 5151 | 5856 |
| 8 | 5585 | 5763 |
| 9 | 5520 | 5924 |
| 10 | 5136 | 5787 |
| 11 | 5077 | 5474 |
| 12 | 5300 | 5699 |
| b. You want to answer the question: Is there a difference in the average number of patients being seen in the emergency room between 2015 and 2016? | ||||||||||
| Why would an independent samples t-test be most appropriate? | ||||||||||
| c. State your null and alternative hypothesis in words and symbols for an independent samples t-test. | ||||||||||
| H0: | ||||||||||
| Ha: | ||||||||||
| H0: | ||||||||||
| Ha: | ||||||||||
| t-Test: Two-Sample Assuming Unequal Variances | ||||||||||
In: Statistics and Probability
|
Property |
Flask 1 |
Flask 2 |
Flask 3 |
Flask 4 |
|
Contents |
100 ml water |
100 ml water |
74ml acetic acid,1.1g sodium acetate, 26ml water |
74ml acetic acid, 1.1g sodium acetate,26 ml water |
|
Initial pH |
7.00 |
7.00 |
5.01 |
5.01 |
|
pH after adding strong acid(HCL) |
2.32 |
4.97 |
||
|
pH after adding strong base(NAOH) |
11.68 |
5.06 |
1. Compare what happen to the pH of flask 1 to what happened to the pH of flask 3 when HCl was added.
2. Which substance, water or the buffer does a better job of maintaining pH when small amounts of strong acid are added?
3. Compare what happen to the pH of flask 2 to what happened to the pH of flask 4 when NaOH was added.
4. Which substance, water or the buffer does a better job of maintaining pH when small amounts of strong base are added?
5. Write equations for the reactions taking place in each of the flasks. For an equilibrium arrow use equals sign (=) ( use H2O for water, A- for acetate ion, HA for acetic acid, H+ for hydrogen ion, H3O+ for hydronium ion, Na+ for sodium ion, and OH- for hydroxide ion.
a. Reaction in flask 1
b. Reaction in flask 2
c. Reaction in flask 3.
d. Reaction in flask 4.
6. In your own words, tell how this experiment is related to the buffer systems in the blood.
In: Chemistry
1. most appropriate statistical tst 2. null 3. Alternative hypothesis 4. Calculate appropriate test statistic 5. A statistical conclusion
The following are results of a protein standard curve assay for the presence of a protein. A standard protein of known concentration was added to each tube and the OD600 was measured on a spectrophotometer. Determine protein conc in unknown sample with a OD600 of 0.345.
| Protein Conc (ug/ul) | OD600 |
| 0 | 0.000 |
| 10 | 0.081 |
| 20 | 0.118 |
| 30 | 0.203 |
| 60 | 0.378 |
| 90 | 0.626 |
| 120 | 0.777 |
| 180 | 1.088 |
In: Statistics and Probability
Summarize
1.Monetary policy tools
2. Quantity equation
3. Okun's law
4. Mutiplier effect and crowding effect
5. Automatic stabilizers
6. Risk aversion and risk taking
In: Economics
| Subject ID | education | memory |
| 1 | 16 | 112 |
| 2 | 18 | 117 |
| 3 | 14 | 96 |
| 4 | 20 | 114 |
| 5 | 16 | 106 |
| 6 | 14 | 80 |
| 7 | 14 | 89 |
| 8 | 12 | 94 |
| 9 | 18 | 113 |
| 10 | 13 | 111 |
| 11 | 17 | 112 |
| 12 | 18 | 84 |
| 13 | 12 | 108 |
| 14 | 16 | 95 |
| 15 | 12 | 117 |
| 16 | 14 | 83 |
| 17 | 8 | 106 |
| 18 | 12 | 100 |
| 19 | 21 | 120 |
| 20 | 15 | 103 |
e. Explain the direction and strength of the relationship based on the r. (2 points total: 1 for strength, 1 for direction)
f. What is the proportion of variance shared between the two variables? (That is, how much of the variance in one variable can be predicted by the variance in the other variable?) (2 points total: 1 if the process is correct but the answer is wrong)
g. If the researcher wants to perform a two-tailed hypothesis test using this data set so that she can generalize the relationship between the two variables from the sample to the population, what would be the null and alternative hypothesis? Write the hypotheses in words and in symbol notation. (2 points total: 1 for each hypothesis, .5 for written, .5 for symbol notation)
h. Using SPSS to analyze the same dataset yields a p value of .245. Based on α = .05, what would be the conclusion of the hypothesis test (use wording of “reject the null hypothesis” or “fail to reject the null hypothesis”? How do you know? (1 point total: .5 for conclusion, .5 for rationale)
In: Statistics and Probability
| Subject ID | education | memory |
| 1 | 16 | 112 |
| 2 | 18 | 117 |
| 3 | 14 | 96 |
| 4 | 20 | 114 |
| 5 | 16 | 106 |
| 6 | 14 | 80 |
| 7 | 14 | 89 |
| 8 | 12 | 94 |
| 9 | 18 | 113 |
| 10 | 13 | 111 |
| 11 | 17 | 112 |
| 12 | 18 | 84 |
| 13 | 12 | 108 |
| 14 | 16 | 95 |
| 15 | 12 | 117 |
| 16 | 14 | 83 |
| 17 | 8 | 106 |
| 18 | 12 | 100 |
| 19 | 21 | 120 |
| 20 | 15 | 103 |
e. Explain the direction and strength of the relationship based on the r. (2 points total: 1 for strength, 1 for direction)
f. What is the proportion of variance shared between the two variables? (That is, how much of the variance in one variable can be predicted by the variance in the other variable?) (2 points total: 1 if the process is correct but the answer is wrong)
g. If the researcher wants to perform a two-tailed hypothesis test using this data set so that she can generalize the relationship between the two variables from the sample to the population, what would be the null and alternative hypothesis? Write the hypotheses in words and in symbol notation. (2 points total: 1 for each hypothesis, .5 for written, .5 for symbol notation)
h. Using SPSS to analyze the same dataset yields a p value of .245. Based on α = .05, what would be the conclusion of the hypothesis test (use wording of “reject the null hypothesis” or “fail to reject the null hypothesis”? How do you know? (1 point total: .5 for conclusion, .5 for rationale)
In: Statistics and Probability
|
Details |
Yrs. 1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
|
Sales (units) |
3000 |
5000 |
6000 |
6500 |
6000 |
5000 |
4000 |
3000 |
|
Fixed Costs |
25000 |
25000 |
25000 |
25000 |
25000 |
25000 |
25000 |
25000 |
|
Annual Depreciation |
114320 |
195920 |
139920 |
99920 |
71440 |
71440 |
71440 |
35600 |
1. Project X is being appraised and has the following details:
The following information is also available:
Unit selling price is expected to be $120 for the first 3 years then fall to $110 thereafter.
Unit variable costs will remain constant at $60/unit throughout the project life
The project required initial outlay of $800 000
The firms marginal tax rate is 34% and the required rate of return is 15%
Required:
Calculate the projects operating cash flows.
What is the project’s NPV.
Is the project acceptable or not why?
What are the factors that influence a firms dividend policy
In: Finance