Part asked to find the sample correlation coefficient

Q: When testing for the difference between two population variances with sample sizes of n1=8 and…

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Q: The following data was taken on a sample of 121 students to see the proportions of left and right…

A: From the given information in the table, we can see that Total no. of students in the sample =121…

Q: Consider the data set 5 3 6 1 6 4 4 Find the average (mean): Find the median:

A: Explanation of the answer is as follows

Q: For a moderately skewed data, the arithmetic mean is 200, the coefficient of variation is 8 and Karl…

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Q: Find the variance of the given population: -8, 9, 10, -10, 7, 6, 4, 3 O 7.07 O 7.56 O 57.13 O 49.98

A: Given : -8,9,10,-10,7,6,4,3

Q: 3. For the following data, find the mean, the median and the mode: -6, 6, 6, 0, -6, 6, -6

A: X=-6,6,6,0,-6,6,-6 Mean is, Mean=∑i=1nXin=-6+6+6+0-6+6-67=0

Q: A contributor for the local newspaper is writing an article for the weekly fitness section. To…

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Q: Find the raw score for 99% with a population mean of 29 and σ of 4

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Q: Construct a 90% confidence interval for the true difference between the mean amounts of time spent…

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Q: Consider the data set 4 2 7 4 Find the average (mean): Find the median:

A: From the provided information, The data values are as follow: 4, 2, 7, 9, 4, 9 Number of…

Q: In a moderately skewed frequency distribution mean is 50 and median is 53. If the coefficient of…

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Q: A student was interested in the cigarette-smoking habits of college students and collected data from…

A: What type of chart best represents the relative class frequency ?

Q: The sample for the survey is ...

A: Here determine sample from which identify no o people support Lafeyette leopard team

Q: A population is normally distributed with µ = 90 and σ = 8. For this population, which score is the…

A: X follows a Normal distribution with mean = 90 and S.D = 8 Then z=(x-mean)/SD = (x-90)/8  follows…

Q: Find the mean of the following data * ,1,0,1,2,3,4- ,2- ,3-

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Q: Find the variance of the given population. -10, -11, -12, 12, 11, 2, 11, 22 O 165.84 O 135.67 O…

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Q: (c) Find the 20 th percentile of the sample mean.

A: (c) Given that, The 20th percentile of sample mean is,

Q: Q2/A- Find the arithmetic mean, median and mode for the following data:

A: Here given total 10 data values Mean is average of data values Median is average of two middle most…

Q: Find the mean of the following sets of data.

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Q: Is the sample mean always equal to one of the values in the sample? If so, explain why. If not, give…

A: FALSE Lets take sample set S={10,15,20,25,30,35} The mean of above sample S is =…

Q: For Roger Maris 14 homerun seasons of 5,  8,  9,  9,  13,  14,  16,  19,  23,  26,  28,  33,  39,…

A: To find the percentile

Q: Choose the best answer for the statistical conclusion.

A: Given information: The data represents the turnaround time for 4 types of contractors and 3 types of…

Q: What is the relationship between the attendance at a major league ball game and the total number of…

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Q: The personal director of an engineering company believes that there is a significant positive…

A: 1] n=10 2] level of significance α=5%

Q: What the variance for the following sample of n = 3 scores? Scores: 1, 4, 7

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Q: how many sports played male vs female based on the data

A: Given, The number of sports played by the students: Grade Number of students 9 16 10 13 11…

Q: If a sample of 362 customers is taken from a population of 5530 customers, the sample variance, s,…

A: Solution -Given that  Sample size n=362 Population size N=5530

Q: The z-scores are

A: Here use standard normal distribution table for z score

Q: What is the mode for the following distribution of scores: Eye colour        Frequency b) Blue…

A: The category having highest frequency is defined as mode. from the four distribution Brown Eye color…

Q: Does the sample size have an effect on the mean of all possible sample means? Explain your answer.

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Q: Consider the data set 2 17 6 8 2 2 Find the average (mean): Find the median:

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Q: Consider the data set 6. 9. 7. 2. 3 9. 2 Find the average (mean): Find the median:

A: Given that, Data set: 6,1,9,7,2,3,9,2,2,2

Q: A researcher used the sample median as a measure of center instead of the sample mean. What do you…

A: Three central tendencies are given as: Mean Median Mode We use these measures of central…

Q: The sample varlance of the above data is

A: Bins x f fx fx^2 0-5 2.5 5 12.5 31.25 5-10 7.5 6 45 337.5 10-15 12.5 8 100 1250

Q: Find the median of the given sample: -11, -12, -10, 9, -8, -7, -6 O -10 -8 -9

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Q: Construct a 99%99% confidence interval for the true difference between the mean amounts of time…

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Q: describe why it is important for the sample in your study to be as representative as the source

A: Representative samples are important as they ensure that all relevant types of people are included…

Q: Gasoline prices (per litre) for the last five weeks were P50.95, P51.25, P52.50 P49.30 and P51.70.…

A: We want to calculate the sample variance

Q: A)In the two tables in the picture, in which examples are the samples representative of the…

A: Different population and corresponding samples are given and objective is to find whether the sample…

Q: Consider the data scores; 7, 10, 14, 19, 25. What is Q3 ?

A: First we have to arrange the data score in ascending order. Next we find the Q3 by using formula.

Q: contributor for the local newspaper is writing an article for the weekly fitness section. To prepare…

A: Given Data : For Sample 1 x̄1 = 4.8 n1 = 57 σ1= 0.8 For Sample 2…

Q: Q3/ What is the test score corresponds to the 33rd percentile for the following data: 15, 12, 5, 16,…

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Q: the questionnaire. For this set of data, find: 1.) the mean, 2.) the median and 3.) the mode.…

A: Here we have sorted data in ascending order: x Frequency (f) f⋅x cf 2 12 24 12 3 20 60 32 4…

Q: Given the 1st and 3rd quartiles of a data are 24 and 48, respectively, what value would be…

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Q: Illustrate the shape of the sampling distribution of r? In what way does the shape depend on the…

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Q: It is analogous to consider the sample mean as the center of the balance point of our data True…

A: It is known that mean is center of balance for the data. Also, the sample mean is a measure of…

Q: For a moderately skewed data, the arithmetic mean is 200, the coefficient of Variation is 8 and Karl…

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Q: from the letters of the word STATISTICS?

A: Given the letters of the word STATISTICS

Q: A contributor for the local newspaper is writing an article for the weekly fitness section. To…

A: Given information: For the first sample (people who exercise in the morning), Sample size, n1=56…

Q: Given the data: 1, 3, 3, 4, 6, 7, 7, 7, 8, 9, 9, 10, 12, 15, 16, 17. Which value is the 75th…

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Correlation

Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.

Linear Correlation

A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related. 

Regression Analysis

Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.