Statistics Expert Q&A
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MV
Muneet Viyas
20 minutes ago
To be a legitimate probability density function,all possible values of f(x)must lie between 0 and 1 (inclusive).
AG
Anwar Guzman
20 minutes ago
To be a legitimate probability density function,all possible values of f(x)must be non-negative.
MR
Mandeep Randhawa
about 1 hour ago
A probability density function shows the probability for each value of X.
CW
Cortney Wetherell
about 1 hour ago
The sum of all values of f(x)over the range of [a,b] must equal one.
MB
Michael Bonilla
about 1 hour ago
Let X represent weekly income expressed in dollars.Since there is no set upper limit,we cannot identify (and thus cannot count)all the possible values.Consequently,weekly income is regarded as a continuous random variable.
JS
Jagjeet Samra
about 2 hours ago
A continuous random variable X has a uniform distribution between 10 and 20 (inclusive),then the probability that X falls between 12 and 15 is 0.30.
NL
Naldo Lewis
about 2 hours ago
Continuous probability distributions describe probabilities associated with random variables that are able to assume any finite number of values along an interval.
NJ
Nugget Jean Gregory
about 2 hours ago
We distinguish between discrete and continuous random variables by noting whether the number of possible values is countable or uncountable.
KS
Katie Swacil
about 2 hours ago
A continuous random variable is one that can assume an uncountable number of values.
JB
Jessie Baker
about 2 hours ago
A continuous probability distribution represents a random variable having an infinite number of outcomes which may assume any number of values within an interval.
RR
Raihan Rahman
about 3 hours ago
If n = 10 and p = 0.60,then the mean of the binomial distribution is
A) 0.06
B) 2.65
C) 6.00
D) 5.76
A) 0.06
B) 2.65
C) 6.00
D) 5.76
NM
Nandi Mosley
about 4 hours ago
The expected value,E(X) ,of a binomial probability distribution with n trials and probability p of success is:
A) n + p
B) np(1 − p)
C) np
D) n + p − 1
A) n + p
B) np(1 − p)
C) np
D) n + p − 1
FE
Filmae Estomagulang
about 4 hours ago
If n = 20 and p = 0.70,then the standard deviation of the binomial distribution is
A) 0.14
B) 2.05
C) 14.0
D) 14.7
A) 0.14
B) 2.05
C) 14.0
D) 14.7
CC
Cherry Crystal
about 4 hours ago
Since there is an infinite number of values a continuous random variable can assume,the probability of each individual value is virtually 0.
JR
Julian Reyes
about 4 hours ago
One requirement of bivariate distributions is that 0 ≤ P(x,y)≤ 1 for all pairs of values (x,y).
JR
Jhenn Ruelo
about 5 hours ago
The standard deviation of a binomial random variable X is given by the formula σ2 = np(1 − p),where n is the number of trials,and p is the probability of success.
AS
Andrew Stewart
about 6 hours ago
If X is a binomial random variable with n = 25,and p = 0.25,then P(X = 25)= 1.0.
MG
Marcos Gomez
about 6 hours ago
The expected number of heads in 250 tosses of an unbiased coin is 125.
BG
Benjamin Gadson
about 6 hours ago
Which of the following about the binomial distribution is not a true statement?
A) The probability of success must be constant from trial to trial.
B) The random variable of interest is continuous.
C) Each outcome may be classified as either "success" or "failure".
D) Each outcome is independent of the other.
A) The probability of success must be constant from trial to trial.
B) The random variable of interest is continuous.
C) Each outcome may be classified as either "success" or "failure".
D) Each outcome is independent of the other.
SI
SMART INVESTING
about 6 hours ago
The number of female customers out of a random sample of 100 customers arriving at a department store has a binomial distribution.