Activity Series:

Question: Does your activity series agree with published data? If there are differences, what are they? What factors can cause a difference between experimental and reported values?

Proteins

1. What is the monomer of a protein?
2. What is one of the most important roles of an enzyme?
3. Describe what happens to protein function when a protein is denatured.
4. Explain how a peptide bond forms between two amino acids.
5. Draw an amino acid.
6. What are the four levels of protein structure? Provide a definition/description of each level.
   1. Explain how the primary structure of a protein is determined.
   2. Name two types of secondary protein structure. Explain the role of hydrogen bonds in maintaining secondary structure.
   3. Explain how weak interactions and disulfide bridges contribute to tertiary protein structure. – R group interactions

Why international students are more likely having harder majors than U.S students.

a.Describe all variables involved and classify them.Additionallyspecify which variable is the response variable and which variable is the explanatory variable.

b.Explain what type of project you can be doing survey, study or experiment. Then: -If you are going to use a survey then explain the process. How is this surveyed population representative of your entire population? Are there any potential sources of bias? Inculude a copy of the survey as an appendix. -If you are doing a study type(retrospective/prospective), population of the interest and sampling frame. Additionally explain the process by which you randomly select one sample, the topic being studied and how you will evaluate the parameter of interest.

c.Submit a copy of the data you collected. This should be an organised list of your raw data.

14. Students Norma Lee and Rangh are discussing force and motion as discussed in class.

(The question didn't specify if the speed is constant or not, please list both possibilities.) Norma is describing the motion of a cart on a level frictionless track and identifying the

forces acting on the cart. She has listed gravity, the track pushing upward and a push in

the direction of motion as acting when the cart is coasting down the track.

Lee is puzzling over a case of circular motion and how a ball moving in a circle with constant

speed can have a net force acting when the speed is not changing.

  Rangh replies that it might help if they consider what object is exerting each force.

Analyze the three students’ statements, identifying what is wrong or right BASED ON YOUR LAB EXPERIENCE AND DATA and knowledge of physics principles.

1.)  A student takes a ten-question true-false quiz, but did not study and randomly guesses each answer. Find the probability that the student passes the quiz with a grade of at least 70% of the questions correct.

2.)  Suppose that about 85% of graduating students attend their graduation. A group of 22 graduating students is randomly chosen.

1. In words, define the random variable X.
2. List the values that X may take on.
3. Give the distribution of X. X ~ _____(_____,_____)
4. How many are expected to attend their graduation?
5. Find the probability that 17 or 18 attend.
6. Based on numerical values, would you be surprised if all 22 attended graduation? Justify your answer numerically.

An FM rock station claims that 85% of all its listeners are college students. A statistician decides to test this claim against the suspicion that the percentage is too high. A random sample of 2000 listeners is selected from the population of all listeners and it is determined that 1655 are college students. Perform a hypothesis test to answer the question: Do the sample results support the statistician’s claim at α = 1 %?

I. State the hypotheses (in words & symbols):

H0:

Ha:

II. Determine the model to test H0 Can one use a normal distribution for the Sampling Distribution model to perform this test? Please explain.

b) Using the appropriate notation, state the MEAN & STD ERROR of the sampling distribution:

Mean:

STD Error:

III. Determine the Decision Rule: State the decision rule:

IV. Analyze the sample data: Using the appropriate notation, state the sample result of the test, p-value and the test statistic.

sample result is:

p-value is:

test statistic is:

V. State the Conclusion:

4 Can the statistician reject the rock station's claim at α = 1%? YOU MUST EXPLAIN YOUR ANSWER.

Prospective drivers who enrol in Smart Driver Driving School have always been taught by a conventional teaching method. The driving school has many branches across provinces. Last year, among all students that took driving lessons from the school in a certain province, 80% passed the provincial road test. This year, the teaching committee came up with a new teaching method. The committee randomly assigned half of its 2400 students enrolled this year to receive the conventional teaching method and the remaining half to receive the new teaching method. In a random sample of 100 students who received the conventional teaching method, 79% passed the road test.

Part i) To test if the passing rate has decreased from last year for students who received the conventional teaching method, what will be the null hypothesis?

A. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year equals 0.79.
B. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year is lower than 0.80.
C. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year is lower than 0.80.
D. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year equals 0.80.
E. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year equals 0.79.
F. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year equals 0.80.

Part ii) For the test mentioned in the previous part, what will be the alternative hypothesis?

A. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year equals 0.79.
B. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year equals 0.80.
C. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year equals 0.79.
D. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year equals 0.80.
E. The proportion of 100 students who received the conventional teaching method and subsequently passed the road test this year is lower than 0.80.
F. The proportion of 1200 students who received the conventional teaching method and subsequently passed the road test this year is lower than 0.80.

Part iii) What is the approximate null model for the sample proportion of the conventional teaching group who passed the road test?

A. ?(0.80, √0.8⋅0.21/200)
B. ?(0.80, √0.8⋅0.2/100)
C. ?(0.79, √0.79⋅0.21/100)
D. ?(0.79, √0.8⋅0.2/100)
E. ?(0.80, √0.79⋅0.21/100)
F. ?(0.79, √0.79⋅0.21/1200)

Part iv) Compute the P-value: (your answer must be expressed as a proportion and rounded to 4 decimal places.)

Part v) What is an appropriate conclusion for the hypothesis test at the 2% significance level?

A. The passing rate for students taught using the conventional method this year is significantly lower than last year.
B. The passing rate for students taught using the conventional method this year is not significantly lower than last year.
C. The passing rate for students taught using the conventional method this year is the same as last year.

Let U and V be vector spaces, and let L(V,U) be the set of all linear transformations from V to U. Let T_1 and T_2 be in L(V,U),v be in V, and x a real number. Define vector addition in L(V,U) by (T_1+T_2)(v)=T_1(v)+T_2(v) , and define scalar multiplication of linear maps as (xT)(v)=xT(v). Show that under these operations, L(V,U) is a vector space.

Researchers wanted to proof that men who ate fried chicken for more than 6 years straight doubled the risk of getting high cholesterol, so they started a cohort study. In 2006, 1,000 men were enrolled in the study and they did not have cholesterol. In 2017, 70% were free of high cholesterol. 1.5% of the cholesterol free men ate fried chicken for about 6 years. The 200 men that ate it for over 6 years developed high cholesterol years after the study started. What is the best measure of association? Show it in a 2x2 contingency table Calculate the measure of association

True or False:

4) There is a potential of information bias in a clinical trial where the clinician who ascertains the outcome is aware of the treatment status of the participant being evaluated.

5) A confounding variable is a factor across which the association between the exposure and the outcome differ.

6) A cohort study was conducted to determine the association of physical activity and CHD in which the average age of the physically active group is 10 years younger than the average age of the inactive group. Age is a confounder given that the risk of CHD increases with age.

7) Systematic errors can be reduced by: minimizing the random error in the study and vice versa.