et x be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that x has a distribution that is approximately ormal, with mean u = 7100 and estimated standard deviation o = 2850. A test result of x < 3500 is an indication of leukopenia. This indicates bone marrow epression that may be the result of a viral infection. (a) What is the probability that, on a single test, x is less than 3500? (Round your answer to four decimal places.) .10383 (b) Suppose a doctor uses the average x for two tests taken about a week apart. What can we say about the probability distribution of x? O The probability distribution of x is approximately normal with u, = 7100 and o, = 1425.00. O The probability distribution of x is approximately normal with , = 7100 and o, = 2850. O The probability distribution of x is not normal. O The probability distribution of x is approximately normal with Hy = 7100 and o, = 2015.25. What is the probability of x < 3500? (Round your answer to four decimal places.) .003754
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.
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