945 Answered Questions for the topic Statistics Question

Statistics Question Statistics Math Help Math Word Problem

01/26/17

question is below i am so lost
A survey of grade point averages over the last 20 years is taken at Academy. It is found that the mean is 2.52, the median is 2.65, and the standard deviation is 0.55. Assuming a normal... more
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Statistics Question

01/14/17

statistics and probability
betting on the color red in the game of roulette has 18/38 chance of winning. what is the expected value and variance for the number of wins in a series of 50 bets on red?
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Statistics Question

01/09/17

Statistics question...help
The probability that Sandra gets a ride to work on any morning is 0.7. The probability that she gets a ride 3 times in a 5-day work week is , and the probability that she gets a ride at least 2... more
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Statistics Question

01/08/17

A coin is tossed 5 times. Find the probability of all 5 times being tails
Answer this word problem
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Statistics Question

01/07/17

Find the z value for x=40 for a normal distribution with μ=30 and σ=5.
What does z=
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Statistics Question

01/06/17

Statistics question...help
The probability that Sandra gets a ride to work on any morning is 0.7. The probability that she gets a ride 3 times in a 5-day work week is  XXXXXX, and the probability that she gets a ride at... more
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Statistics Question

01/05/17

Statistics question...help
Five people buy individual insurance policies. According to the research, the probability of each of these people not filing a claim for at least 5 years is .The probability that all 5 have not... more
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Statistics Question

01/05/17

Statistics question...help
  When Kevin plays chess with Aaron, the probability that Kevin wins is 0.75. If Aaron and Kevin play 25 games, what is the probability that Kevin wins exactly 15 times?   0.02 0.32 0.04 0.97
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Statistics Question Statistics Probability Algebra

12/31/16

When a biased coin is tossed, the probability of getting a tail is 1/4. If the coin is tossed two times, what is the probability of getting two heads?
I'm having a little trouble with this
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Statistics Question Calculus Mathematics

12/27/16

Given coordinates (a,b), and a function f(x), what is (b-f(x))/(f(x)) = N when f(x) = f(a)
I have discovered for a data point (a, b) and a function f(x), when (b-f(x))/(f(x)) = 0, then the given coordinate (a, b) is touching exactly on the function's graph. If that 0 where changed to a... more
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Statistics Question

12/25/16

please help with normal distribution
The Vehicle Speeds at a certain location in PLUS highway can be described by a normal distribution. The mean speed is 110 km/h, and the standard deviation is 10 km/h. Find the percentage of vehicle... more
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Statistics Question

12/24/16

Principles of statistics
A student has an evening job as a waiter in a restaurant, for which the monthly incomes are normally distributed with a mean of RM 400 and a standard deviation of RM 80.i. Without doing any... more
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Statistics Question

12/24/16

statistics
a) According to the social Survey conducted at New York city, 45% of employed adults believed that if they lost their job, it would be easy to find another with a similar salary. Suppose that TEN... more
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Statistics Question

12/24/16

One Touch Ent. Sells mobile phones as well as other communication gadgets. TABLE 2 shows the probability distribution for the number of mobile phones sold per d
TABLE 2 No.of mobile phones sold: 15 16 17 18 19 20 per day, XP(X = x): 0. 12 0.15 0.20 0.25 0.17 0.11i. Show that the above distribution is a probability distribution of the random variable Χ.ii.... more
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Statistics Question

12/24/16

Probability and a tree diagram
A study on smoking habit among students at University ABC shows that 25% of males are smokers and 4.5% of females are smokers. The sample for the study consists of 1000 students where 450 of them... more
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Statistics Question

12/23/16

question related to statistics (please, urgent)
1. Decide whether the numerical value describes a parameter or a statistic.   “Starting salaries for all MBA graduates from the School of Business, University of Eriz increased 85% from the... more
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12/19/16

Conditional Probability: Are my answers correct?
A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 10% of the time if the person does not have... more
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Statistics Question Statistics Proportions Proportion

12/15/16

Confidence Intervals
In a Harris Poll of 412 HR professionals, 85.3% said that the job applicants appearance is most important for a good impression. Construct a 94% Confidence Interval for the True population... more
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12/15/16

Discrete probability distributions
If you select a red diamond picture card (i,e.) a card that doesn't have a number on it) you win $100. It costs $10 to play this game. What is your expected earnings? if you played this game 10,000... more
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Statistics Question Binomials

12/15/16

Suppose 28.5% of US teens eat while driving. Find the probability that among 13 randomly selected teens at least 3 don't eat while driving.
I think this question has to do with the binomial formula.
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Statistics Question Ap Statistics Binomial Distribution

12/15/16

The census bureau reports that 29% of California residents were born outside of the US. Suppose that you choose four Californians independent of each other.
Let F= the number of foreign-born people in a randomly-selected group of four.  a)Find P(f=1) b)Find P(f>or =1) c)find and interpret the expected value of F. d)find and interpret the... more
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Statistics Question

12/14/16

a bag contains 3 red and 2 orange balls, you pick 5 balls without replacement. what is the probability you will get 3 red and 2 orange balls
i don't have any additional details to add
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12/13/16

Hi, what analysis is appropriate for the following research?
data collected from an experiment to determine whether prior information about a team’s aggressive reputation impacts on the way in which referees perceive the intent to harm when two players are... more
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Statistics Question Math Statistics Deviation

12/12/16

find the standard deviation
SS = 120 and score or (n) is 30. how do I compute the standard deviation with no individual scores. Variance is 4.14
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Statistics Question

12/11/16

If there are 27 little league teams competing for first, second, third, and fourth place trophies in a tournament,
in how many distinct ways can the trophies medal be won?
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