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steven a.

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Q4. [6 pts] Chi-square test. A health researcher wants to explore whether there is an association between smoking status and exercise habits among adults in a city. She conducts a simple random survey of 300 adults and classifies them based on two categorical variables: • Smoking status: Smoker, Non-Smoker • Exercise habits: Exercises Regularly, Occasionally, Never The observed data are shown in the contingency table below: Exercises regularly Exercises occasionally Never exercises Total Smoker 25 40 35 100 Non-smoker 85 60 55 200 110 100 90 300 (a) [2 pts] State the null and alternative hypotheses in this case for testing the association between smoking status and exercises habits. (b) [1 pt] Determine the expected counts for smokers who never exercise? (c) [2 pts] Identify the test statistics value and make a conclusion at 5% significant level for the testing stated in part (a) based on the following chi-square test: Pearson's Chi-squared test data: dta X-squared = 8.8182, df = 2, p-value = 0.01217 (d) [1 pt] In part (c), you see that p-value is 0.01217, describe how to find this p-value under a chi-square distribution.

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The distal tubule is where _ cells are impermeable to waterO micturition occursO secretion of K+ and H+ occursO most reabsorption of solutes and water takes place

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A 3-phase,800 v,synchronous motor having a power consumption of 100 KW i s connected in parallel with an induction motor which takes 500 kw at 0.8 lagging po wer factor.Calculate: (a) The current drawn from the mains when the power factor of synchrono us motor is unity. [6 mar ks ] (b) The power factor at which the synchronous motor will operate with mini mum drawn from the mains. [6 marks] (c) The minimum current drawn from the mains. [4 marks]

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WIN $10,000! Pringles WHAT'S THE WHAT'S THE FLAVOUR? FLAVOUR? GUESS TO WIN $10,000! As can be seen, the packaging is black-and-white, giving no particular clue to the flavor inside. Mr Pringle on the logo looks puzzled. And the caption at the top of the packaging reads "what's the flavor? Guess to win $10,000. Therefore, it has been designed as a competition-based sales promotion. STUDENT QUESTIONS 1. Do you think that this campaign be likely to increase short-term sales? 2. Why would a consumer buy a product where they did not know whether they liked the flavor? 3. Why would the brand associate with the letters WTF, given this can also have a negative connotation? 4. Why would the brand run this sales promotion, rather than just introducing the new flavor straight to the marketplace? 5. Could this campaign help increase brand engagement overall? 6. Other than short-term sales, what other marketing goals could this campaign have for the brand?

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[4b] Let $A \in \mathbb{R}$. Then $det \begin{pmatrix} 1 & 2 & 3 & 4 \ 4 & \lambda & 2 & 3 \ 3 & 4 & 1 & 2 \ 2 & 3 & 4 & 1 \end{pmatrix} = $ Answer:

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(20 points) Write a complete program that will calculate the dot product of two integer vectors. Let the user input 6 values into vectors A and B respectively. Create a function named DPX that receives the two vectors and returns its dot product. At the end print the message: "The dot product of vectors V1 and V2 is #", where the symbol # means the dot product. The formula for dot product is: \(A \cdot B = a_1 \cdot b_1 + a_2 \cdot b_2 + a_3 \cdot b_3 + a_4 \cdot b_4 + a_5 \cdot b_5\)

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Consider the following scenario, a street sign is hit with two different gusts of wind. The red arrow represents a gust of wind hitting the pinwheel at and angle $\theta = 31.0^\circ$ with a force of 16.8 [N] and the blue arrow represents a gust of wind hitting the pinwheel at $\phi = 14.5^\circ$ with a force of 9.25 [N]. If $d = 35.25$ [cm], find the moment the street sign experiences in [N-m] about its center and express your answer below. The use of significant digits is not required. Report your answer to the hundredths-place.

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Consider the following bonds: a) 3-year zero coupon bond with a face value of £100 (Bond A), b) a semi-annual 6% coupon bond with a face value of £100 and a maturity of 4 years (Bond B). c) a semi-annual 5% bond with a maturity of 2 years and a face value of £100 (Bond C). Assume that the required yield is 4% per annum across all maturities. a) Calculate the prices of all three bonds. b) Calculate the duration of all three bonds. c) Calculate the convexity of all three bonds. d) If an investor owns one thousand of the 3-year zero coupon bonds, calculate how much of each of the other bonds should be held to make the portfolio immune to small parallel shifts in required yields using the durations and convexities of the bonds.

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Which of the following system changes the air flow of the refrigerant to the indoor units according to the demand? (In this system, multiple indoor fan coil units may connected to one outdoor unit.) Your answer: ? VFR ? VRF ? VAV ? CAV

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Bubble Sort Problem Description: In the bubble sort algorithm, smaller values gradually "bubble" their way upward to the top of the array like air bubbles rising in water, while the larger values sink to the bottom. The bubble sort makes several passes through the array. On each pass, successive pairs of elements are compared. If a pair is in increasing order (or the values are identical), we leave the values as they are. If a pair is in decreasing order, their values are swapped in the array. You are given an incomplete code for this assignment. You need to complete the following tasks. 1. Implement the bubble sort algorithm in the following function. void bubbleSort(int a[], int size); 2. Complete test cases 3 and 4, respectively, in the main() function. Pseudo-code: Set Boolean variable swapped to true For pass = 0 to size - 2 { Set swapped to false For j = 0 to size - 2 - pass { If a[j] is greater than a[j+1] { Swap a[j] with a[j+1] Set swapped to true } } If no elements are being swapped, break out of the loop }

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