Why can’t the following mode predict 100% of the variability in the price of a used Corolla?

Q: how are parameters and statistics related?

A: Parameter: The parameter is used to explain the entire population. For example, a teacher calculated…

Q: Define & Discuss in details the importance of an outlier

A: An outlier is the observation in the data set which is much different from the rest of the data. For…

Q: Why is it ideal that you report underlying frequencies when you are reporting percentages?

A: A frequency is the number of participants or cases; its symbol is the weird F. The symbol of the…

Q: What percent of data is less than -8%

A: here we can see that shape of curve is bell shaped and symmetric about x = -6 so it is normal…

Q: prediction

A:

Q: What are 2 situations when you will use mode as a measure for central tendency.

A: Mode mode is the value which occurs most frequentlyn in the data set of observation and around which…

Q: Qualitative data that cannot be ranked is called categorical, nominal 1. True 2. False

A: Given that, Qualitative data that cannot be ranked is called categorical, nominal.

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: Popular magazines rank colleges and universities on their academic quality in serving undergraduate…

A: A bit theory says    A quantitative variable can be measured and compared numerically  we can use…

Q: Describe how outliers can impact the relationship between two variables?

A: We have to describe how outliers can impact the relationship between two variables?

Q: When would you use the median rather than the mean as a measure of central tendency? Why?

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: How do you find the controlled effect and the partial effect of a relationship in statistics?

A: Relationship between any two variables can be dependent on presence of another variable it is known…

Q: Describe a variable that would likely result in a positively skewed distribution. Justify your…

A: Histogram is used to show the skewness exist in the data set. There are two type of skewness they…

Q: You can calculate an average/mean of qualitative data. True or False

A: mean , median and measure of spread  can't be calculated for qualitative data, because no natural…

Q: Why do you think that the mean is the most sensitive measure of central tendency?

A: We know that, mean is the ratio of sum of all observation and number of observation. Let, xi be the…

Q: Find the mean for the following data 5, 3, 4, 8, 1, 4 Round your answer to the nearest hundredth…

A: Solution

Q: According to the Empirical Rule. What percent of the data lie (Round to whole number like 30%)?…

A: The study is about the Empirical rule.

Q: what range of raw scores makes up the middle 40%

A: The middle 40% means, the scores lie between 30th and 70th percentile. From stand normal, z-score…

Q: Calculate the Percentile Rank for a student who becomes fourth (4th) in terms of the GPA categorized…

A: The formula for percentile rank of score is, Percentile rank of score=Number of values below…

Q: There is a drastic change in the expected age dependency ratio in the year 2060 compared to what the…

A: Old age dep ratio:   The R2 value corresponding with old age dep ratio is 0.8564. That is, the…

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: ccording to this data, what is the "normal range" for creatinine levels? That is, in what range will…

A:

Q: In tests of proportions, the data is qualitative. True False

A: Qualitative data  is categorical and consists of categories or labels that cannot be easily…

Q: rage sales per agent per month from March to May target? Answer: % Which one is the category with…

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

Q: North Salinas Price Sq Feet Beds 535 2473 4 389 1118 2 229 459 440 285 439 495 295 347 549 599 500…

A: Given: n = 24 Formula Used: Correlation coefficient r = n∑XY-∑X∑Yn∑X2-∑X2n∑Y2-∑Y2 Test-statistic t =…

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: what z value correlates to 98.96% under  the curve

A: If Z represents standard normal distribution, then we need to find the value z such that…

Q: Is 64.3% a statistic or a parameter? Justify your answer.

A: The objective of the question is to determine whether 64.3% is a statistic or a parameter.

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.