When we standardize xbar, we use the formula Z = (xbar-mu) / (sigma/sqrt(n)),
where
xbar = sample mean,
mu = population mean,
sigma = population standard deviation, and
n = sample size
Instead of sigma, if we use the sample standard deviation (s), then it becomes ? = (xbar-mu) / (s/sqrt(n)). What is "?" in the formula above?
a. T
b. C
c. Z
d. F
e. X

Write two subtraction equations that are equivalent to 5 + 12 = 17.

With this question substitute t=3 and t=5 to determine if the two expressions are equivalent. 4(t + 3) 4t+12 which statements are true? check all that apply. a. the value of both expressions when t =5 is 32. b. the two expressions are not equivalent. c. the value of both expressions when t=3 is 15. d. the value of both expressions when t=5 is 23. e. the two expressions are equivalent. f. the value of both expressions when t=3 is 24.

Janice determined there were 10 possible outcomes when tossing two coins and spinning a spinner numbered 1 through 6. what is the correct number? what might have been janice's error?