4,099 Answered Questions for the topic probability

Probability

2d

Probability of 2 different people choosing some of the same marbles from a jar

There are 20,412 unique marbles in a jar. One person picks 11 marbles, and puts them back and the jar is thoroughly mixed. Another person then picks 5 marbles. What is the chance that 2 of the 5... more
Probability

3d

Probability_Math

​58% of U.S. adults have very little confidence in newspapers. You randomly select 10 U.S. adults. Find the probability that the number of U.S. adults who have very little confidence in newspapers... more
Probability

4d

need help with this Math question!

In the 2016 referendum on the independence of wales from the UK, approx.44% of welsh population was pro-independence. Suppose we now interview arandom sample of 100 people. What is the probability... more
Probability

4d

Green, Red and Blue Ball (Probability)

In a bag there are green, blue and red balls. Take one ball off the bag. The probability of taking a green ball is 1/3, and the probability of taking off a blue ball is 1/2. There are 6 red balls.... more
Probability Math Statistics Act Math

5d

Find the probability that

From a box there are 6 white balls and 4 red balls, then 4 balls are selected, without replacement, at random and transferred to a second box, which is empty.balls are selected at random and... more
Probability Statistics Act Math

6d

Determine the probability that this student is a) very well prepared, b) poorly prepared.

In a group of 10 students taking the exam, there are 3 who have prepared very well, 4 well, 2 moderately well and one poorly.well, 4 well, 2 moderately and 1 poorly prepared. There are a total of... more
Probability Math Statistics

7d

Using the set of data, which set has larger variance? Justify the answer without computing the variance of each set of data.

Consider the following data:Data 1 Data 21 142 144 156 152 163 135 121 133 ... more
Probability Statistics

8d

Finding probability using population mean and sample standard deviation

Greenleaf Lawn Care finds that the population mean cost of leasing homes in the area is $1250. If 20 homes are randomly selected, the standard deviation in the sample is s = $963. What is the... more

what percent of these differ from the population mean(nomal distribution)

if a set of observations is normally distributed, what percent of these differ from the population mean by more than 0.96σ, where σ is the population standard deviation.
Probability

9d

Statistics probability

Use a normal approximation to find the probability of the indicated number of voters. In this​ case, assume that 144 eligible voters aged​ 18-24 are randomly selected. Suppose a previous study... more
Probability

10d

Mathematics Probability

An average of 5 customers come to the shop every half hour. Find the probability that exactly two customers will come to the shop during a given hour2. The life span of an automatic washer is... more
Probability

10d

What is the distribution of x.

suppose the random varible x has a binomial distribution with p>.5 then the distribution of x isa) skewed to the leftb) skewed to the rightc) normal distributiond) symmetric
Probability

10d

What is the distribution of x.

suppose the random varible x has a binomial distribution with p>.5 then the distribution of x isa) skewed to the leftb) skewed to the rightc) normal distributiond) symmetric
Probability Statistics

11d

Problem on bivariate probability distribution

Suppose the bivariate probability distribution of a random vector ( X,Y) is given according to the distribution in the following table ... more
Probability Statistics

11d

If the equation of the regression line is y = 4.964 + 0.939x, how can it be interpreted?

If the equation of the regression line is y = 4.964 + 0.939x, how can it be interpreted?Select one:a. The slope of the line is .0.939b. Every unit of change in the value of x, the value of y also... more

11d

I need so much help with this question from my Algebra homework very quickly please I am so desperate

Question 1: Identify the variance and the standard deviation of the given data set.{7, 8, 6, 3, 4, 12, 14, 10} A.) variance: 12.75 standard deviation: 12.75 B.) variance: 7.2 standard deviation:... more
Probability Statistics

11d

Construct a sample

Construct a sample (with at least two different values in the set) 5 of measurements whose median is larger than all the members in the sample. If this is not possible, indicate "Cannot create... more
Probability Math Geometry

11d

Please help me!! Probability! Need to turn this in soon, thank you!!

The senior class of Serious Tech High School decided to have an ice cream party. They decide on ice cream cones. But being independent thinkers they each want to have a different cone. But the... more
Probability Statistics

12d

Question is in the decription.

A survey is done by a news agency for presidential elections. The agency reported that the Reds areleading Blues by 11%, because 48% of the participants supported Red Party’s candidate while 37%... more
Probability Statistics

12d

Choose the correct answer

The correlation coefficient for a set of paired data points will always be a number between zero and one inclusive.Select one: a. True b. False c. insufficient information
Probability Statistics

12d

Choose the correct answer

If two different scatter plots have exactly the same regression lines, then they will also have the same correlation coefficient.Select one: a. True b. False c. insufficient information
Probability Statistics

12d

Choose the correct answer

If the points of a scatter plot all lie exactly along a straight line, then their correlation coefficient will be exactly equal to one.Select one: a. Trueb. Falsec. insufficient information

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