Y Example 20. Daily sales (recorded in rupees) of a retail shop are given below : Daily sales in Rs. 102 106 110 114 118 122 126 (X-Mid-point of interval) : No. of days 3 6. 25 35 17 10 (Frequency-f) : Calculate the mean and the standard deviation of the above data. Also calculate the coefficient of vạriation.

Q: Compute r, the correlaton coeffcient, USma the follout data X. 434

A: The correlation coefficient r is computed using the formula below: r=n∑xy×-∑x∑yn∑x2-∑x2×n∑y2-∑y2…

Q: The graph illustrates the distribution of test scores taken by College Algebra students. The maximum…

A: i! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at a…

Q: P(75<x<105) mean is 80 and standard deviation is 94

A: Mean = 80 Standard deviation = 94

Q: If the correlation coefficient between number of years of experience of an employee and the monthly…

A: The correlation coefficient between number of years of experience of an employee and the monthly…

Q: How can we calculate the Average Rates of Change?

A:

Q: How correlation coefficient is Independent of Units of Measurement?

A: Correlation: Correlation a measure which indicates the “go-togetherness” of two data sets. It can be…

Q: Use the value of the linear correlation coefficient r to find the coefficient of determination and…

A: Given r=0.986

Q: The correlation coefficient always moves between 0 and 1. True or False.

A: The correlation coefficient can be negative, zero or positive.

Q: In regression and correlation, explained variation (r2) represents

A: The explained variation r2 also called as coefficient of determination.

Q: = The annual rainfall in a certain region is approximately normally distributed with mean = 41.8…

A: Mean(µ) = 41.8Standard deviations (σ) = 5.6X ~ N (µ, σ )= N(41.8, 5.6)

Q: Explain what it means when a correlation between the variables X and Y have anr2of 0.72.

A: The value of R2 is 0.72.

Q: Explain what a correlation coefficient (r-value) is and how we can use it to help us interpret a…

A: The correlation coefficient, often denoted as 'r', is a statistical measure that calculates the…

Q: Does the data follow standard normal? Suppose the data size is 100. Then, we know, in the interval…

A: Given that the data size is 100 and the numbers in the interval as Interval Frequency…

Q: True or false: the correlation coefficient between height in inches and height in centimeters is 1.

A:

Q: The scores and their percent of the final grade for a statistics student are given. What is the…

A: The data shows the scores and their percent of the final grade for a statistics student.

Q: A researcher is interested in the correlation between number of past romantic partners X and current…

A: The question is about regression Given : Coefficient of non determination = 0.78   To find : % of…

Q: What would be the most likely level of measurement for capturing variation on distance that student…

A: Four types of measurement scales: Nominal: This type of scaling is used when a data takes categories…

Q: true or false Correlations are expressed as either a positive or negative value between -1.0 and…

A: The given statement is that 'correlations are expressed as either a positive or negative value…

Q: Give an example of a scatter plot with 5 points that has a correlation of r=0 on the axes below. How…

A: The number of observations is n = 5.

Q: When the change in a variable 'x' directly causes the change in another variable 'y' that is an…

A: Here the variable x directly causes the change in another variable y.

Q: What are the steps for the Constructing Relative Frequency Distributions?

A:

Q: A correlation coefficient should be used when the independent and dependent variable are measured as…

A: The objective of the question is to identify the type of variables for which a correlation…

Q: For each part, compare distribution (1) and (2) based on their means and standard deviation. You do…

A: b). The given data set is: Distribution 1 -20 0 0 0 15 25 30 30 Distribution…