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63 Answered Questions for the topic Probability Stats

03/17/18

Probability Question

Question: Homer and Marge play a game by taking turns rolling a standard six-sided die,starting with Homer, until there occurs a sequence of k or more 4s immediatelyfollowed by a 5 or 6 (e.g. 45,... more
Probability Stats Math Statistics

03/12/18

What is the probability of selecting a jury of all​ students?

The grade appeal process at a university requires that a jury be structured by selecting seven individuals randomly from a pool of eleven students and eight faculty.     (a) What is the... more

04/19/17

Probability

A computer is programmed to produce at random a single digit from the list 0,1,2,3,4,5,6,7,8,9. The program runs twenty times. Let Y be the number of zeros that occur. a) State the distribution... more
Probability Stats Statistics Statistics Question

04/17/17

confident intervals and central limit theorem.

A random sample of 39 cows was fed a special high-protein grain for a month. Each was weighed before and after and the average weight gained was 6.7 pounds, with standard deviation 7.1.i. Construct... more
Probability Stats Probability Problem Solving

04/01/17

A bag contains 5 white balls and 9 red balls. Three balls are drawn, without replacement, from the bag.

(a) What is the probability that all three balls are white? (b) What is the probability that exactly one ball is white? (c) What is the probability that at least one ball is white?
Probability Stats

03/23/17

how many different ways can a city health department inspector visit 6 restaurants in a city with 15 restaurants

 I am having a difficult time with probability. 
Probability Stats Statistics Math Help

03/12/17

stats question

For a normal shaped distribution with μ = 50 and σ = 8: A. What proportion of the scores fall between 46 and 54? B. For samples of n = 4, what proportion of the sample means fall between 46 and 54?... more
Probability Stats

03/11/17

Help with probability stats question

The credit department of Lion’s Department Store in Anaheim, California, reported that 26% of their sales are cash, 20% are paid with a credit card, and 54% with a debit card. Twenty percent of the... more
Probability Stats Statistics Statistics Question

11/28/16

Statistics Question!

Do adding multivitamin supplements to your daily diet help decrease the number of colds caught...is this a double blind or single blind study?
Probability Stats Statistics Probability

11/16/16

Probability Function

The probability density function f(x) of a continuous random variable X is:   f(x)={ -kx, If -1<x<o       ={k, If o≤x<1, where k is a positive constant.       ={o, otherwise. I, Graph... more
Probability Stats

11/12/16

a six sided die is rolled once. Find the probability of P(odd given less than 4)

Stats Question
Probability Stats

10/24/16

Confused with this

3. In a rural area, only 30% of the wells that are drilled find adequate water within a depth of 100 feet or less. A local man Jed Clampett asserts he can do better by “dowsing” - using a forked... more
Probability Stats Math Probability

10/11/16

5 cards are selected from a fair deck. What is the Probability that they contain at least 4 reds?

5 cards are selected from a fair deck. What is the Probability that they contain at least 4 reds?   Please & Thanks!!
Probability Stats Math Probability

10/09/16

A fair die is thrown 10 times. What is the probability of rolling a 1 on exactly 2 of the 10 throws?

A fair die is thrown 10 times. What is the probability of rolling a 1 on exactly 2 of the 10 throws?   Please help!!
Probability Stats

10/04/16

prob stats

The grade appeal process at a university requires that a jury be structured by selecting four  individuals randomly from a pool of five students and eleven faculty.? (a) What is the probability of... more
Probability Stats

10/04/16

stats, find the least squares

An essay test has 13 questions. Students are required to answer 11 of the 13 questions. How many different sets of questions could be? answered?
Probability Stats

09/27/16

probablity

test to determine whether a certain antibody is present is 99.599.5?% effective. This means that the test will accurately come back negative if the antibody is not present? (in the test? subject).... more
Probability Stats Probability Problems

09/26/16

In a population of 22,000,000.00What is the probability of three people meeting randomly who lived within three houses from each other 43 years ago?

1973 - Perth West Australia,  population 900,000: age 12 :- I live in an apartment block of 40 units.  1995 - Perth West Australia, population of 1,800,000: age 33 :- meet husband in a blind date.... more
Probability Stats Probability Math Help

08/25/16

What is the probability a randomly selected other student will score higher than you if you score in the 80th percentile?

What is the probability a randomly selected other student will score higher than you if you score in the 80th percentile on a standardized test?
Probability Stats Probability Math Help

08/25/16

For the following variables, would the distribution of scores approximate a normal curve?

For the following variables, would the distribution of scores approximate a normal curve? Please explain why and if its not going to have a normal curve, what distribution shape is it really likely... more
Probability Stats Mean Median Mode Mean

08/22/16

What is a real life situation in which using the median is preferable to the mean?

What is a real life situation in which using the median is preferable to the mean? Number examples please!
Probability Stats

07/24/16

need the lower and upper endpoint

An economist wants to estimate the mean per capita income (in thousands of dollars) for a major city in California.  Suppose that the mean income is found to be  $24.4 for a random sample of  748... more
Probability Stats Probability Problem Solving

07/17/16

Assuming X is a binomial random variable, what is the probability exactly 3 cars are left unlocked?

There is a p=12.5% chance a parked car will have been left unlocked. X is the number of cars left unlocked in a parking lot with a total of 6 cars. Assuming X is a binomial random variable, what is... more

07/17/16

Assuming X is a binomial random variable, what is the mean number?

There is a p=12.5% chance a parked car will have been left unlocked. X is the number of cars left unlocked in a parking lot with a total of 6 cars. Assuming X is a binomial random variable, what is... more
Probability Stats

06/15/16

Find the range, variance, standard deviation for the sample data. Given that these are the top 10 salaries.

Listed below are the top 10 annual salaries (in millions of dollars) of TV personalities. Find the range, variance, and standard deviation for the sample data. Given that these are the top 10... more
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