23. Market research has provided data on the monthly sales of a licensed T-shirt for a popularrock band. Determine the equation of the median-median line. Round final answers to twodecimal places.T-shirt Price25401520351030T-shirt Sold147592019601600110021501325

Given data: T-shirt Price, X T-shirt Sold, Y 25 1475 40 920 15 1960 20…

Answered: 23. Market research has provided data…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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1. Given the data attached, please fill in BOTH blanks: The slope increases from 3,330 to ____ dollars/carat and the intercept decreases from -140 to ____ dollars.
23. Market research has provided data on the monthly sales of a licensed T-shirt for a popular rock band. Determine the equation of the median-median line. Round final answers to two decimal places. T-shirt Price 25 40 15 20 35 10 30 T-shirt Sold 1475 920 1960 1600 1100 2150 1325
A property analyst is examining the relationship between the City Council's valuation on residential property and the market value (selling price) of the properties. A random sample of 8 recent property transactions were examined. The data is recorded in the tables below. Find the intercept (rounded off to four decimals). 1 2 3 4 5 6 7 8 A. 0.0892 B. -4.0293 OC. 6.7128 D. 1.285 City Council valuation (R1000) 12 45 32 50 28 56 18 40 Market value (R1000) 65 220 142 310 196 364 116 260 SSxy=10319.875 SSY = 70990.875 Exy=69084 b = 6.1912 SSX 1666.875 x = 34.4286 y=209.125
Use this data which give the dosage levels for a particular drug and the heart rate measured 30 minutes after taking the drug. Dose (mg) Heart rate 0.125 95 0.20 90 0.25 93 0.30 92 0.35 88 0.40 80 0.50 82 Create a scatter plot. Use your Ti-84
Test Score 7. A history teacher asked her students how many hours of sleep they had the night before a test. The data below shows the number of hours the student slept and their score on the exam. Plot the data on a scatter plot. Hours Slept 5 7 4 9 Test Score 83 86 74 88 76 63 90 60 89 81 90 85 80 75 70 65 60 1 2 3 4 5 6 7 8 9 10 11 # of Hours Slept
Use this dataset for your analysis software. Cost-to-charge ratio (the percentage of the amount billed that represents the actual cost) for inpatient and outpatient services at 11 Oregon hospitals is shown in the following table. A scatterplot of the data is also shown. Hospital 1 2 3 O No 4 5 6 7 8 9 10 11 No No 100 90 80 70 60 50 Cost-to-Charge Ratio Outpatient Inpatient Care Care 45 62 66 63 51 75 65 56 45 48 71 54 å Inpatient 55 80 76 75 62 100 88 64 50 54 83 100 65 Outpatient The least-squares regression line with y = inpatient cost-to-charge ratio and x = outpatient cost-to-charge ratio is ý = -1.1 + 1.29 x. (a) Is the observation for Hospital 11 an influential observation? Yes (b) Is the observation for Hospital 11 an outlier? Yes 75 (c) Is the observation for Hospital 5 an influential observation? O Yes O No (d) Is the observation for Hospital 5 an outlier? O Yes O No
Which graph shows the line of best fit for the data?
The scatter plot shows the number of hours worked and money spent on entertainment by each of 24 students. Also shown is the line of best fit for the data. Fill in the blanks below. 70 65 60 55. Amount of 50 × 45 money spent on entertainment 40+ (in dollars) 35. × × 30 25 20 15. × 10+ 5-x 0 6 8 10 12 14 16 18 20 22 Number of hours worked (a) For these 24 students, as the number of hours increases, the amount of money spent tends to (Choose one) (b) For these 24 students, there is (Choose one) money spent. correlation between the number of hours worked and the amount of (c) Using the line of best fit, we would predict that a student working 8 hours would spend approximately (Choose one) ▼ ك ?
There are 25 students who started computer programming in elementary school and 25 students who started computer programming in middle school. The first group had a mean final project grade of 95% and the second group had a mean final project grade of 92%.The line plot shows the differences after 10 rerandomizations. Determine whether the difference in the means of the two groups is significant based on the line plot. Explain your answer.
Scenario: A pediatrician wants to determine the relation that may exist between a child’s height and head circumference. She randomly selects eleven 3-year old children from her practice, measures their heights and head circumference, and obtains the data shown below: Child’s Height and Head Circumference Height (inches) Head Circumference (inches) 27.75 17.6 24.5 17.3 25.5 17.4 26 17.5 25 17.1 25.75 17.8 26.5 17.5 27 17.7 26.75 17.5 26.75 17.8 27.5 17.7 If the pediatrician wants to use height to predict head circumference, determine which variable is the explanatory variable and which is response variable. Draw a scatter diagram of the data. Draw the best fit line on the scatter diagram. Does this scatter diagram show a positive, negative, or no relationship between a child’s height and the head circumference?

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23. Market research has provided data on the monthly sales of a licensed T-shirt for a popular rock band. Determine the equation of the median-median line. Round final answers to two decimal places. T-shirt Price 25 40 15 20 35 10 30 T-shirt Sold 1475 920 1960 1600 1100 2150 1325