True or False: The mean is the same thing as the average
Q: Briefly describe the difference between correlation and regression.
A: Correlation: A correlation or correlation coefficient is a numerical value that measures and…
Q: how are parameters and statistics related?
A: Parameter: The parameter is used to explain the entire population. For example, a teacher calculated…
Q: Briefly explain the difference and similarity of correlation and regression.
A: Correlation Regression It determines the interconnection or a relationship between the variables.…
Q: the mean = 146, and s = 35 Question #3 A percentage of female students with scores between 41 and…
A: From the provided information, Mean (x̅) = 146 Standard deviation (s) = 35
Q: When data is normally distributed the mean equals the median True False
A: Normal distribution
Q: Suppose that the profits made by a construction company in four projects were 3, 2, 4 and 6%,…
A: The formula of the mean is,
Q: Illustrate the Test R2 for significance?
A: Coefficient of determination: The coefficient of determination (r2) is the percentage of total…
Q: When data is normally distributed the mean equals the mode. True
A: Normal distribution
Q: A negative z-score indicates that the score or value is above the mean. True or False
A: Given: z-score
Q: In regression and correlation, explained variation (r2) represents
A: The explained variation r2 also called as coefficient of determination.
Q: -9 -8 -7 -0:3- -0-2- 0:4 -0-1-
A: Given information- Population mean, µ = -6 Population standard deviation, σ = 1 Let, X be the random…
Q: Describe about the Mean as Balance Point?
A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…
Q: What is MEAN SQUARE: GENERAL EXPRESSION?
A: Introduction Statistics is a field which involves collection, arrangement and analysis of the data…
Q: Briefly explain the differences between the terms true relative error percentage and approximate…
A: True error is that the true value of a problem, equation, or something measurable is one value and…
Q: What is percentage of variance explained (r2)? What info does it tell you about the independent…
A: What is percentage of variance explained (r2)=Square of correlation coefficient What info does it…
Q: how did you find the mean? why is it 72.5
A: Given data : The observation in increasing order is 30, 40, 50, 50,50, 55, 55, 55, 60, 65, 70, 70,…
Q: A positive z-score indicates that the score or value is below the mean. True or False
A: We want to tell you above statement is true or false
Q: What is p value ?
A: The P-value is the probability of observing difference in the sample statistic this high or higher…
Q: Please no written by hand solution Explain why an outlier affects the mean more than the median or…
A: Outlier- An outlier is a data point that significantly differs from the other data points in a…
Q: What is the difference between the average resistance to happiness at age 20 and at age 70?
A: Given :- R = 4.6 - 0.02x put x = 20. ⇒R=4.6 - 0.02 × 20⇒R=4.6 - 0.4⇒R=4.2 Now, put x = 70 ⇒R=4.6 -…
Q: State the type of correlation between the number of hours students spend studying and the number of…
A: Correlation is the measure of linear association between two quantitative variables. If one…
Q: How do i calculate finding the percentage between two z scores?
A: To find the probability between two z-scores: z-score represents the number of standard deviations…
Q: What is difference between the Differences between Mean and Median?
A: The measures of centre or measures of central tendency are those descriptive measures that give the…
Q: explain the concept of positive correlation
A: Correlation refers to the relationship between between two variables. It can be positive or…
Q: Where did the 25% come from?
A: Since we know that 25% difference between each quartile
Q: The variance is sometimes a negative number.
A:
Q: A market researcher at a major clothing company that has traditionally relied on catalog mail-order…
A: Introduction :- We have to explain in this context what the 7% represents in the given context.
Q: Find the average of 1/2, 1/3 , and1/4
A:
Q: How is correlation measured and how is the value interpreted?
A:
Q: e, negative, or no correlation. 3.
A: A positive correlation is a relationship between two variables in which both variables move in the…
Q: If the test result is significant at 5% level, it must also be significant at 1% level. True O False
A: Given : Significance level , α = 0.05
Q: Chuck has noticed over the last several years that as he gets older, he also gets more politically…
A: It is needed to find the correlation between Person C’s age and his conservative leanings.
Q: how did you find the Z score?
A: The critical value of z for 97% confidence interval is 2.17.
Q: What does the R-Squared represent?
A: Solution r is the correlation coefficient
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- Statistics teacher realize that his studentS keep using cell phones during the class. Then he did some research and found out that people use cell phones for 7.2 hours per day on average in turkey, and usage time variability around that average is 2.0449 Then he decides to givean assignment of reading books as an alternative of cell phone usage in exchange of 50 extra credit to their statistics exam. After the exam, He collected the data of cell phone usage time from his 127 students and calculated that average cell phone usage time drops to 6.8 hours per day. Under the assumption that probability of uncontrolled factors leading you the wrong statistical decision is five percent, conduct the statistical analysis to decide whether decrease in the cell phone usage time is real or it happens just because of the random chance and interpret the results.Explain the relationships among covariance, scatter plot, and correlation?How is statistics used in everyday life? Who uses statistics? How can a course in statistics benefit you?
- What does the sign and actual number tell you in a correlation?A negative correlation indicates that as the values of one variable increase, the values of a second variable decrease. O True O Falseixd s 67 Dr 5. Find the percentage of data points that lie above z 1.03. Draw a picture to support your work.
- Describe the concept of Regression toward the Mean.Statistics teacher realize that his students keep using cell phones during the class. Then he did some research and found out that people use cell phones for 7.2 hours per day on average, and usage time variability around that average is 2.0449. Then he decides to give an assignment of reading books as an alternative of cell phone usage in exchange of 50 extra credit to their statistics exam. After the exam, he collected the data of cell phone usage time from his 127 students and calculated the average cell phone usagetime drops to 6.8 hours per day. a) Under the assumption that probability of uncontrolled factors leading you the wrong statistical decision is five percent, conduct the statistical analysis to decide wheter decrease in the cell phone usage time is real or it happens just because of the random chance b)and interpret the resultsDo you think the mean:44.19 or the median:30 better represents the data? Explain your reasoning
