Answers created by De Rono

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• Is there a difference between a correlation and a correlation coefficient?
  
• What is the difference between the formula for variance and sample variance?
  
• In the below list of numbers, what number represents the outlier? 3, 4, 8, 9, 10, 3, 7, 12, 14, 12, 4, 29, 6, 9
  
• What is a Bayesian inference?
  
• What is the difference between the mathematical formula of a multiple linear regression and a simple linear regression?
  
• How do you calculate the covariance between two discrete variables?
  
• How do you graph using slope and intercept of #-7x+y=-19#?
  
• Is the ordered pair (2,3) a root of the equation x+2y=8?
  
• How do you graph and find the discontinuities of #f(x)=1/x -4#?
  
• In a symmetric distribution, are the mean, median, and mode always equal?
  
• How should a scatter plot of data look if there is a negative correlation?
  
• What do measures of central tendency indicate?
  
• What is the standard deviation of #1, 2, 3, 4# and #5#?
  
• How do you convert the polar coordinate (4, 315) into cartesian coordinates?
  
• How do solve #2.6^x = 20.4#?
  
• How do you solve #log_(2) (5x + 7) - log_(2) x = 2#?
  
• How do you solve #log_2 x+log_4 x=log_2 5#?
  
• Can you find the standard deviation of negative numbers?
  
• For what #x# is #(3x)/(x+3)>3/(x-2)#?
  
• What is the generalized R-Squared?
  
• How do you verify #cos^3 * sin^2 x = (sin^2 x - sin^4 x)cos x#?
  
• What is #int e^(2x)dx#?
  
• What is the standard deviation of {1, 2, 3, 4, 5}?
  
• What is the variance of a binomial distribution for which n = 75 and p = 0.20?
  
• What does it mean for a data set to be bimodal?
  
• How do you simplify #sqrt(0.01x^4y^2)#?
  
• How do you solve #-x-1 < -9001#?
  
• How do you solve #2.3(x + 1.4) = -9.66#?
  
• How do you solve #|x – 9| < 11#?
  
• How do you simplify #5 - 3(y + 7)#?
  
• What are the dimensional requirements for matrix multiplication?
  
• What is a Veblen good?
  
• For random variables #X# and #Y#. What is #"Var"(X+Y)# in terms of #"Var"(X)# and Var(Y)?
  
• How do you write equivalent equations in the form of inverse functions for #x=y +cos 0#?
  
• How do you find the quotient of #(4x^2 – y^2) ÷ (2x – y)#?
  
• What is the derivative of #f(x)=2cosx-cos2xdx#?
  
• How do you find the exact value of #(19 pi)/12#?
  
• How do you simplify each expression using positive exponents #(a^4 b^-3)/(ab^-2)#?
  
• How do you simplify #x + 9x + 3#?
  
• What does it mean about events #A# and #B# if #P(A|B)=P(B|A)#?
  
• If data with a normal distribution has a mean of 100 and a standard deviation of 15, what is the probability that a given value is greater than 110?
  
• What is the Kolmogorov formula for conditional probability?
  
• What does it mean if the null hypotheses is rejected?
  
• If you roll a pair of dice, what is the probability of rolling either a single 5 or a sum that is an even number?
  
• If #P(A) = 0.7, P(B) = 0.9# and #P(A nn B)=.4#. What is #P(B|A)#? What about #P(A|B)#?
  
• What are the bounds of an R-Squared value?
  
• If you flip a coin three times, what is the probability of getting tails three times?
  
• What do the mean, median, and mode tell you about a set of numbers?
  
• What is the standard deviation of a binomial distribution with n=10 and p=0.70?
  
• Can an R-Squared value be greater than 1?
  
• What is a partition of sums of squares?
  
• What is the standard deviation of the standard normal distribution?
  
• If you roll a die, what is the probability of rolling a number greater than 4?
  
• Can the range of a data set affect the mean, median, or mode?
  
• What is sample variance?
  
• How do you derive a cumulative density function from a probability density function?
  
• How does standard deviation differ from standard error?
  
• How do you solve #(x - 3 )^2 = -10#?
  
• What is the mathematical formula for the probability density function of the general normal distribution?
  
• Question #65b14
  
• How do you factor #54x^4-2xy^6#?
  
• What does covariance mean?
  
• How do you simplify #1/4 + (-3/4)#?
  
• What information can you represent with a box and whisker plot?
  
• What is a standardized regression coefficient?
  
• Suppose X has probability density function f(x)=6x(1-x) for 0<x<1 and 0 otherwise. What is E[X] and Var[X]?
  
• Why must the R-Squared value of a regression be less than 1?
  
• What is a pooled variance?
  
• Do all random distributions follow a "normal" distribution?
  
• What is the Ordinary Least Squares of a data set?
  
• What is the general formula for the variance and mean of a binomial distribution?
  
• How do you simplify #4y+7y#?
  
• How do you use the Change of Base Formula and a calculator to evaluate the logarithm #log_6 27.5#?
  
• What are the intercepts of #3x - 5y = 6#?
  
• How do you solve # -x^2 + 100x - 2400 >= 0#?
  
• How do you simplify #9+ 2p+ 3#?
  
• How do you simplify #(3x+5y)/( 5y^2)#?
  
• What are x and y if #2y+x= - 4# and #y-x= - 5#?
  
• Question #76ad3
  
• How do you solve the following system using substitution?: #5x-2y=19, 3x+17y=34#
  
• How do you find the intercepts for #y = -x - 2#?
  
• How do find the quotient of #(x^2-3x+2) div (x-1)#?
  
• How do you simplify #x +3 (x + 4y)#?
  
• How do you simplify #9y-4-11y+7#?