2.2. Calculate the correlation of coefficient (r).

Q: The simple correlation coef.icients between profits X1), sales (X2) and ad- vertising expenditure…

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Q: (a) Calculate correlation coefficient from the following results : N= 10, EX=140, E Y= 150 E (X –…

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Q: the compunted correlation between x any is 0.71. f x is the amount & doctric bill agl Y Is the…

A: Given information: The correlation between X and Y is 0.71. That is, r=0.71 Here, X is the amount of…

Q: What is the relationship between Za and Zb? A E a В

A: Vertical angles: the angles should be formed by two intersecting lines and both should be opposite.…

Q: Vith which of the following scatterplots below does the correlation, r 0.09, match?

A: Here Given different scatter plots having  different corelation

Q: Calculate correlation coefficient from the following information: N= 10, ΣX= 140, ΣΥ= 150, Σ(Χ- 10,…

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Q: Given the following data obtain the yield when the rainfall is 29 inches : Rainfall (inches) Yield…

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Q: Q. 8. Calculate co-efficient of correlation from the followine results: N= 5 Ex = 80 Ey = 130…

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Q: For the data shown to the right, determine the linear correlation coefficient using the formulas…

A: With the given formula we have to calculate the linear correlation coefficient.

Q: QI For the next data ,the correlation factor (r) is : * 2 5 8 11 14 And

A: Given, X 2 5 8 11 14   And y = 4x     To find,  Correlation factor (r) = ?   Formula: r =…

Q: Kahl Co wants to know whether there is a correlation between the number of labour hours worked (x)…

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Q: Calculate correlation coefficient from the following data : N= 10, Σ X= 140 , Σ Υ-150 E (X – 10)2 =…

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Q: The coefficient of correlation between X and Y is and of = a, ož = 4a, and o; = 114 where Z = 3X –…

A: Given that Z=3X-4YSo,…

Q: Compute for the coefficient of correlation coefficient and interpret its meaning.

A: Compute for the coefficient of correlation coefficient and interpret its meaning.

Q: Based on the data shown below, calculate the correlation coefficient (to three decimal places) y 4…

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Q: Calculate Coefficient of Correlation from the following results: 100, ΣΥ- 150 Σ(X- 10)%= 180, Σ (Y-…

A: Answer:

Q: 1.2. Calculate the correlation of coefficient (r).

A: Here, Two variables are given, X : Income per annum (in R 1000)  Y : Life Insurance (in R 1000) The…

Q: The relationship between the number of hours a person practices a task and the time it takes them to…

A: The value of correlation coefficient is obtained below:From the given information the value of r2 =…

Q: please highlight the correct answer Choose all that apply

A: Solution: Positive correlation: If a change in one variable tends to change in another variable in a…

Q: Calculate correlation coefficient from the following results : N 10 ΣΧ 100 I(X-10) = 180, £(Y-15)² =…

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Q: Find Co-efficient of correlation from following results. N = 10, Mean x = 5, Mean y = 7 and sun of…

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Q: Campute the correlation co-efficient between the variables X and Y represented b) following table: X…

A: The formula for the calculation of correlation co-efficient is r=n∑xy−∑x⋅∑yn∑x2−∑x2×n∑y2−∑y2.

Q: Find probable error, when the coefficient of correlation is 0.8 and number of items is 64 and…

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Q: e found to have a strong positive linear correlation. Pick the 0.37x + 25 D.87x + 25 7х — 25 — 25 -

A: The regression line is of the form, Y = a+ bx Here b is the slope and a is the intercept. If the…

Q: Q5. The correlation coefficient will be zero when А. Е(X— X)(Y— Ў) —D 0 B. E(X – X)² = 0 С. | C. E(Y…

A: We know that.  If r is equal to +1 then there are strong positively correlation and If r is equal to…

Q: Using the above, compute the pearson correlation coefficient, r. Report your answer to 3 digits…

A: Let X denote the number of computer science doctorates awarded in the United States And Y denotes…

Q: the strength of correlation is indicated by: both (a) and (b) (B) its sign (+ or -) None of the…

A: the strength of correlation is indicated by

Q: What do you mean by positive and negative correlation? Write down the properties of the coefficient…

A: Positive Correlation: If the coefficient of correlation (r) has a positive value, then the…

Q: The df for the correlation are based on the number of observations minus 2.   a) True    b) False

A: Correlation :  A correlation is a statistical test that demonstrates the relationship between two…

Q: Find (i) the Mean of X, (ii) Coefficient of correlation between X and Y.

A: here given N= 50 regression equation X on  Y is 3Y-5X = -180 variance of X is 9/16 of variance of X…

Q: Use the following data to a. determine the coefficient of correlation, rounded to the nearest…

A: Given Subject: A B C D E F GTime watching TV: 8, 4, 2, 7, 7, 5, 6Time on the internet: 14, 12, 8,…

Q: Solve the following by Pearson r and test the significant correlation at 5% tabular value. Interpret…

A: To solve this problem we use excel

Q: What is the r2value if the obtained correlation is r= 0.70? a.  0.049 b.  0.49 c.  1.40 d.…

A: Here we need to find the value of the coefficient of determination from the given value of…

Q: 1.Respond to the following questions about Pearson’s correlation. a.Which is a stronger…

A: The r-value that represents the strongest correlation is -0.56. r-value that have the strongest…

Q: find the coefficient of determination, given that the value of the linear correlation coefficient,r,…

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Q: 4 Y 3 6 2 Find the correlation from the above data. CO CO CO 2.

A: Using excel:

Q: Find r2 if the correlation coefficient is 0.92.   Only round your final answer to 2 decimal places.

A: Given: correlation coefficient r=0.92  Then calculate the coefficient of determination (r2) ??

Q: Find the correlation coefficient and report it accurate to four decimal places. r =

A: We have to calculate the correlation coefficient between two variables x and y.

Q: Which of the following interpretations is the most correct? O The correlation of +0.8 is just as…

A: Math Achievement and Overall Math Aptitude r = 0.8 Math Achievement and Overall Math Anxiety r =…

Q: The correlation between a variable and itself is always equal to 0.5 -1 O 1

A: Correlation: Correlation measure the degree to which two variable are dependent on each other…

Q: r= 0 indicates that there is no linear relationship However, it does not necessarily mean that there…

A: Pearson correlation coefficient is an association statistic.

Q: of 4 he number of hours a student spends studying and the score on that student's exam. correlation…

A: In a correlation analysis, the correlation coefficient is the exact measure that determines how…

Q: Below aré the overhead widths (in cm) of seals measured from photographs and the weights (in kg) of…

A: Given : x y 7.1 112 7.5 178 9.6 238 9.4 205 8.8 204 8.2 188 Hence, Option B

Q: Use the equation below for calculating the correlation co-efficient, r to state when the correlation…

A: This is a problem of theoretical distribution.

Q: Which plot indicates a correlation of 0.7? 150 10

A: There are two types of correlation: positive correlation and negative correlation Two variables are…

Q: e. Compute the covariance and correlation coefficient r between the right tire pressure. f. How do…

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Q: Which of the following correlation (r) show a negative association between 2 variables?

A: The correlation coefficient r shows the strength and direction of the linear relationship between…

Q: Compute r, the correlation coefficient, using the following data.  x 2 1 7 8 3 6 y 3 4 10 11 4…

A: In this question we have a given data for variable x and y, and we have to find the correlation…

Q: te correlation coefficient from the following N= 10, EX= 140, E Y= 150 Σ (X- 10)2Ξ180, Σ (Y- 15)2215…

A: Given, N = 10 ∑X = 140∑ Y = 150∑(X - 10)2 = 180 ∑(Y - 15)2 = 215 ∑(X = 10)(Y - 15) = 60     To…

Q: QI For the next data ,the correlation factor ( r) is : * x: 2 5 y = 4 x 8. 8 11 14 |And

A: In this case, it is given that y=4x The table represents the value of x and y. x y 2 8 5 20…