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Statistics and Probability

Recent questions in Statistics and Probability

Jamya White 2023-03-08

If A and B are two independent events such that $P (A) > 0.5, P (B) > 0.5, P (A \cap \bar{B}) = \frac{3}{25} P (\bar{A} \cap B) = \frac{8}{25}$ , then the value of $P (A \cap B)$ is
A) $\frac{12}{25}$
B) $\frac{14}{25}$
C) $\frac{18}{25}$
D) $\frac{24}{25}$

vomi2xn 2023-03-06

Mean of the squares of the deviations from mean is called the:
Variance
Standard deviation
Quartile deviation
Mode

Tyrell Singleton 2023-02-26

The unit of plane angle is radian, hence its dimensions are
A) $[M^{0} L^{0} T^{0}]$
B) $[M^{1} L^{- 1} T^{0}]$
C) $[M^{0} L^{1} T^{- 1}]$
D) $[M^{1} L^{0} T^{- 1}]$

inimigurhkg 2023-02-22

Clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 340 babies were born, and 289 of them were girls. Use the sample data to construct a 99% confidence interval estimate of the percentage of girls born?

Tanya Love 2023-02-21

What is the probability of drawing a red face card from a deck of cards?

Rose Weaver 2023-02-21

Choose the right answer from the following if $A = 1$ and $B = 0,$ what is the value of $A . A + B$ ?
A) $0$
B) $A^{2}$
C) $A$
D) $B$

Jadiel Bowers 2023-02-20

Sean and Evan are college roommates who have part-time jobs as servers in restaurants. The distribution of Sean’s weekly income is approximately normal with mean $225 and standard deviation $25. The distribution of Evan’s weekly income is approximately normal with mean $240 and standard deviation $15. Assuming their weekly incomes are independent of each other, which of the following is closest to the probability that Sean will have a greater income than Evan in a randomly selected week?
1) 0.67
2) 0.7000
3) 0.227
4) 0.303
5) 0.354

Jamari Bowman 2023-02-20

What percent of $240$ is $30$ $?$

adwelitiovb 2023-02-20

Which of the following statements is not correct for the relation R defined by aRb, if and only if b lives within one kilometre from a?
A) R is reflexive
B) R is symmetric
C) R is not anti-symmetric
D) None of the above

ordewayaeroge9sqy 2023-02-18

What is the range of a linear function?

Nola Nunez 2023-02-18

What is the effect of wind speed on evaporation?

Stricker42o2 2023-02-18

How to evaluate P(10,2)?

Rory Moran 2023-02-17

Find the range of $\frac{x^{2}}{1 - x^{2}}$

Tyrell Singleton 2023-02-17

Which of the following polynomials are binomials?
(1) p(x)=x+1
(2) q(x)=x^3+x
(3) r(x)=sqrt2+x+x^2
(4) r(u)=u+u^2−2

pienelis8n9 2023-02-13

State the main limitations of statistics.

daliner4jl 2023-02-12

Find the remainder when $5^{99}$ is divided by 8 is

verderaf1xq 2023-02-09

A king comes from a family of two children. What is the probability that his sibling is a sister? A)1/2; B)1/3; C)2/3; D)3/4

Duftgart3yb 2023-02-09

A line segment is a part of a line as well as a ray. True or False

Liana Vaughn 2023-02-09

What is the probability of getting a black ace or a red jack when drawing a card from a deck of 52?

verfugtg5e 2023-02-08

The first 15 digits of pi are as follows: 3.14159265358979
The frequency distribution table for the digits is as follows:
$\begin{array}{cc} D I G I T & F R E Q U E N C Y \\ 1 & 2 \\ 2 & 1 \\ 3 & 2 \\ 4 & 1 \\ 5 & 3 \\ 6 & 1 \\ 7 & 1 \\ 8 & 1 \\ 9 & 3 \end{array}$
Which two digits appear for 3 times each?
A) 1, 7
B) 2, 6
C) 5, 9<br<D) 3, 8

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Statistics and Probability