With a new mass shooting nearly every day, it is not surprising that violent crime is on everyone’s minds.   Using the FBI’s crime statistics from randomly selected U.S. cities, answer the following questions:

Perform a correlation. What is the correlation coefficient?

If there IS a correlation, what other variables may be acting as intervening variables (e.g., causing the change in crime rate making it appear as if there is a relationship when one doesn’t exist.)?

If there is NOT a relationship, between unemployment and violent crime, can you think of any variables that might be acting as suppressors (i.e. dampening a relationship that might actually be there)?

Perform a regression to predict violent crime. Show your regression analysis.

Write out the prediction model.

What does the model tell you?

Are the model’s results accurate and reliable? How do you know?

what jumps out as a MAJOR issue with the crime data?

A coffee company sells bags of coffee beans with an advertised weight of 454 grams. A random sample of 20 bags of coffee beans has an average weight of 457 grams. Weights of coffee beans per bag are known to follow a normal distribution with standard deviation 5 grams.

(a) Construct a 95% confidence interval for the true mean weight of all bags of coffee beans. (Instead of typing ±, simply type +-.) (1 mark)

(b) Provide an interpretation of the confidence interval in (a). (1 mark)

(c) Conduct a hypothesis test at the 5% level of significance to determine if there is evidence that the true mean weight of all bags of coffee beans differs from 454 grams. You will be marked on your calculation of the appropriate test statistic, P-value and a carefully worded conclusion.

(d) Provide an interpretation of the P-value in (c). (1 mark)

(e) Could the confidence interval in (a) have been used to conduct the test in (c)? Explain why or why not. If it could have been used, what would your conclusion be and why? (1 mark)

Many organic molecules act as acids and bases and can exist in an acid or base form. For each molecule, match the following acid or base with its' conjugate base or acid

1. CH₃NH₂

2. CH₃CH₂O^-

3. CH₃CH₂N(CH₃)₃⁺

4. CH₃CH₂OCH₃

5. (CH₃)₃NH⁺

a.CH₃NH₃⁺

b. (CH₃)₂NH₂⁺

c. CH₃CH₂O^-

d. CH₃CH₂OH

e.(CH₃)₃N

f. CH₃CH₂OOH

g. none of these

Why do unsaturated fats remain liquid at room temperature?

Their rigid structure prevents their interaction with adjacent molecules to form a solid.

The glycerol in unsaturated fats keeps the fatty acids fluid and prevents formation of solid form.

Their structure causes kinks in their conformation, which prevents close packing into a solid form.

The glycerol in unsaturated fats causes kinks in its structure, which prevents it from forming a solid.

Find the pH of each mixture of acids.

Part A

7.0×10⁻² M in HNO3 and 0.165 M in HC7H5O2

Part B

1.5×10⁻² M in HBr and 2.0×10⁻² M in HClO4

Part C

9.5×10⁻² M in HF and 0.230 M in HC6H5O

Part D

0.110 M in formic acid and 4.5×10⁻² M in hypochlorous acid

1. What volume of each of the following acids will react completely with 70.00 mL of 0.200 M NaOH  ?

a) 0.250 M HCL

b) 0.200 M HNO3

c) 0.100 M HC2H3O2 (1 acidic hydrogen)

2. A 22.26-mL sample of hydrochloric acid solution requires 35.00 mL of 0.115 M sodium hydroxide for complete neutralization. What is the concentration of the original hydrochloric acid solution?

38: Critic acid cycle intermediates are always being removed for various reasons but the cycle does not run out of intermediates and stop. This is because we can always make intermediates: WE CAN ALWAYS MAKE INTERMEDIATES FOR CITRIC ACID CYCLE FROM?

A. from acetyl-CoA

B. from even chain fatty acids

C. from the catabolism of heme in the spleen

D. using anaplerotic reactions

63. Which of the following is an omega 3 fatty acid?

A.   18:0

B.   18:3 Δ^9,12,15  

C.   16:1 Δ⁹

D.   18:2 Δ^9,12

E.   20:4 Δ^5,8,11,14

64. Which of the following is an essential fatty acid?

A.   lauric acid

B.   oleic acid

C.   linoleic acid

D.   linolenic acid

E.   both C and D are essential fatty acids.

Given the following acids or bases. 1) H2PO4 -2 2) CH3NH3 a. Write the reactions for each of the above b. Write the K expressions for the reactions and look up the K for each of the above. c. What is the conjugate of each of the above? (there may be more than one) d. Write the reaction for the conjugate interacting with water. e. Write the K expressions for the reactions that involves the conjugate and calculate the value of the K.

To enhance gluconeogenesis using acetyl CoA from the oxidation of fatty acids, the normal TCA cycle is turned off by phosphorylation of ___ and the glyoxylate cycle is turned on, instead. This cycle uses two acetyl-CoA to produce one ___ , which is also substrate for gluconeogenesis.

Select one:

a. isocitrate dehydrogenase ; oxaloacetate

b. isocitrate lyase ; citrate

c. isocitrate dehydrogenase ; citrate

d. isocitrate lyase ; oxaloacetate

e. None of these