Choose the correct answer1- Example for Positive correlation isA) Income and expenditureB) Price and demandC) Weight and Income2- If the value of two variables moves in same direction, the correlation is said to be:A) NegativeB) positiveC) perfect positiveD) no correlation3- The correlation for the following dataN=25, Σ x = 125, Σ Υ = 100, Σ Χ2 = 650,ΣΥ? = 436,Σxy = 520 isA) 0.667B)-0.006C) -0.667D) 0.704- If two variables move in decreasing direction, then the correlation isB) NegativeA) PositiveC) perfect positiveD) no correlation5- The correlation for the following dataN=11Σx = 117, ΣΥ = 260,Σ x2 = 1313,ΣΥ? = 6580 Σxy = 2827 isC) 0.4566A) 0.3566B)-0.3566D) -0.4566

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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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Similar questions

What is the relationship between q and p?
Which of the following is the best estimate for the correlation r of the data in the scatterplot below! Answer choices: a.) 1.00 b.) 0.80 c.) -0.83
Match the following choices with the given diagrams. A. Positive linear correlation B. Negative linear correlation C. No linear correlation 10 20 y 20 y 10 10 40 2- -50 10
2. The number of hours 13 students spent working on a project and the grade they earned Hours spent on 6| 7 1 2 4 4 5 7 8 project, x Project Grade, y 50 65 71 78 74 70 83 85 98 85 84 90 95 type of correlation: Conclusion: 6
DECISION RULE For the following hypothesis test scenario, select the correct decision regarding the null hypothesis. Ho: p = .33 H1: p+.33 a= .10, p-value= .0950 Reject the null hypothesis O Do not reject the null hypothesis
1. A medical student is studying heart rate. The student wants to know if there relationship between age and heart rate. She collects the following data from children selected at random. Heart rate Age (yrs) 92 89 90 84 79 102 108 12 86 14 a) Make a scatter plot of the data. b) Describe the relationship(positive, negative and none) you see between heart rate and age and determine the type of correlation (linear or non-linear) that exists. Relationship Туре» c) Draw a line of best fit. d) What do you think is the heart rate of a newborn baby? Justify your answer. e) What do you think is the heart rate of someone who is 20 years old? What type of prediction is this?
Which of the following choices could be the Pearson correlation between the x and y variables shown in the scatter plot shown here? a) .934 b) -.934 c) 1 d) 0
Jim and Larry run a soup stand. The data below represents the sales of soup that they had on 8 randomly selected days, along with the high temperature on that day. a) Create a scatter diagram for this data set and comment on whether there is a positive or negative relationship between these variables.b) Calculate the correlation coefficient between temperature and sales.c) Does a linear relationship exist between these variables? Explain to me why or why not this is the case.d) Using excel, calculate the least squares regression equation for this data set. e) Using your equation, predict the soup sales on a day where the temperature is 29 degrees.f) Interpret the slope of this equation.g) Can we use this data set and regression equation to predict the sales on a day when the average temperature is 102 degrees? Why or why not?h) What is the R-squared for this equation? How do you interpret that R-squared?
Suppose the correlation between variables x and y isr = – 1. Also suppose that the data contains the points (6, 14) and (2, 18). Finally, suppose that the x-values in the data set are: æ 2 3 5 6 8 Make a scatterplot of this data set. 20+ 19 18 17 16 15 14 13 12 10 8 6 6
An insurance investigator has observed that people with some astrological signs tend to be safer drivers than people with other signs. Using insurance records, the investigator classified 150 people according to their astrological signs and whether or not they were involved in a car accident during the previous 12 months. Do the following data indicate a significant relationship between sign and accidents? Test with a = .05. Libra Leo Gemini Accident 7 4 19 No Accident 73 46 1
3. The speed (in miles per hour) of 8 vehicles and their braking distance (in feet) when stopping on a dry surface speed, x braking distance, y 20 30 40 50 50 60 65 70 55 72 75 110 138 162 193 225 type of correlation: Conclusion
For each graph describe the correlation as none, weak, or strong and positive or negative .

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