Chapter Quiz Determine whether each statement is true or false. If the statement is false‚ explain why. 1. Probability is used as a basis for inferential statistics. 2. The height of President Lincoln is an example of a variable. 3. The highest level of measurement is the interval level. 4. When the population of college professors is divided into groups according to their rank (instructor‚ assistant professor‚ etc.) and then several are selected from each group to make up a sample‚
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ANSWERS 1. Consider the trade-story as if it describes two separate trades‚ where: In the first trade‚ the man buys something for $60 and sells it again for $70‚ so he makes a profit of $10. In the second trade‚ the man buys something for $80 and sells it again for $90‚ so he makes again a profit of $10. Conclusion: The man makes an overall profit of $10 + $10 = $20. You can also look at the problem as follows: The total expenses are $60 + $80 = $140 and the total earnings are $70 + $90 = $160
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INTRODUCTION Chemical kinetics‚ which can also be explained as reaction kinetics‚ studies the rates of chemical processes and reactions. A lot of this has to do with the speed at which a chemical reaction occurs for instance the rate at which reactants and products appear and disappear. In this case chemical kinetics goes further in depth to understand what conditions affect the rate of a given reaction. This is important because it allows scientists to determine what type of reaction can occur
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of variables in equations. Answer True False 2 points =T Question 2 . In general‚ an increase in price increases the break even point if all costs are held constant. . Answer True False 2 points =F Question 3 . Fixed cost is the difference between total cost and total variable cost. . Answer True False 2 points =T Question 4 . Probabilistic techniques assume that no uncertainty exists in model parameters. . Answer True False 2 points =F
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A+ quiz When you are discussing the memory capacity of a memory module‚ the capacity is specified in C.Bytes Explanation Memory module capacities are typically specified in an a-by-b format. Under this format‚ the capacity of the device (in bytes) is derived by multiplying the two numbers and then dividing by eight (or nine for memory modules with parity chips). How many devices can a single USB hub support? C.127(Missed) Explanation The universal serial bus (USB) is a high-speed serial interface
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Lab 7: Catalysts Introduction Pre-Lab Questions 1. What is a catalyst? An enzyme is a biological catalyst that speeds up chemical reactions in the body. 2. If you continue to add more catalyst will the speed of a reaction always continue to increase? Explain your answer. It will continue to speed up the reaction until there is more catalyst than the limiting reactant. 3. In this lab you will produce oxygen and water from hydrogen peroxide (H2O2). Write a balanced reaction equation for this reaction
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exists in model parameters. Answer Selected Answer: False Correct Answer: False • Question 2 2 out of 2 points Parameters are known‚ constant values that are usually coefficients of variables in equations. Answer Selected Answer: True Correct Answer: True • Question 3 0 out of 2 points Fixed cost is the difference between total cost and total variable cost. Answer Selected Answer: False Correct Answer: True • Question 4 2 out
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OBSERVATIONS AND ANALYSIS Trial 1 – Logger Pro graphs Trial 2 – Logger Pro graphs Trial 3 – Logger Pro graphs Trial 4 – Logger Pro graphs Trial 5 – Logger Pro graphs Note: the analysis #1 a) and b) will only be demonstrated on the graphs of trial 1 for this report‚ trial 2-5 have approximately the same results. a) The region where the ball was being tossed but still remained in hand (x). Examine on the velocity vs. time and acceleration
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Unit 4 – Trigonomitry Quiz True or False Questions‚ circle your answer. 1. cos(α)=opposite/adjacent true false 2. sin(54)=3.4/2.7 true false for: 3. sin(α)/a=sin(β)/b is the same as a/sin(β)=b/sin(α) true false 4. SohCahToa is not the same as primary trigonomic ratios true false 5. The cosine law is: cos(γ)=(a²+b²-c²)/(2ab) true false Multiple Choice‚ mark your answer(s). 1. sin(20°)=45.9/c a.) c=88.79 b.) c=134.21
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Quiz 2 Chapters 4 & 5__TEAM A week 5________________________ 1) Use the standard normal distribution to find P(-2.25 < z < 1.25). A) .0122 B) .8821 C) .8944 D) .4878 P(-2.25 < z < 1.25) = F(1.25) - (1 - F(2.25)) = 0.89435 - (1 - 0.987776) = 0.882126 2) Before a new phone system was installed‚ the amount a company spent on personal calls followed a normal distribution with an average of $ 900 per month and a standard deviation of $50 per month. Refer to such expenses as PCE’s (personal call
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