5,385 Answered Questions for the topic probability

Probability

06/11/21

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
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Probability

06/11/21

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
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Probability Statistics

06/10/21

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
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Probability Statistics

06/10/21

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
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Probability

06/10/21

Using a standard deck of cards, what is my probability that I choose a red card, put it back, then I choose a 7
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06/10/21

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
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Probability Statistics

06/10/21

Construct Sample

Construct a sample (with at least two different values in the set) of 4 measurements whose mode is larger than at least 1 of the 5 measurements. If this is not possible, indicate "Cannot create... more
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Probability Statistics

06/10/21

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
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Probability Math Geometry

06/09/21

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
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Probability Statistics

06/09/21

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
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Probability Statistics

06/09/21

Question is in the description.
A new COVID-19 vaccine is developed and the developer company claims that the vaccine’s protectionlasts longer than their competitors. In an experiment with 55 subjects, the company showed that... more
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Probability Statistics

06/09/21

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
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Probability Statistics

06/09/21

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
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Probability Statistics

06/09/21

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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Probability

06/09/21

Describe the relationship between the number of tosses and the probability?

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Probability Statistics

06/08/21

What is the critical value (in a test about proportions) for a left-tailed test with α = 0.05 and n ≥ 30?
What is the critical value (in a test about proportions) for a left-tailed test with α = 0.05 and n ≥ 30?select one: a. z = -1.96b. z = -2.33c. z = 2.58d. z = -1.645e. No Answer
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Probability Math Statistics Act Math

06/08/21

Exercise of conditional probability
Consider a population made up of families in which there are more than five children, so that the percentages of families with 0, 1, 2, 3, 4 and 5 children are given by 5%, 15%, 30%, 25%, 20% and... more
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Probability Math Statistics Act Math

06/08/21

Probability exercise

Suppose a blood test for a certain contagious disease is such that the probabilities of a false negative and a false positive are both equal to 0.01. Suppose further that the probability that a... more
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Probability Statistics

06/07/21

When is a Type II Error made?
A man goes to trial where he is being tried for the murder of his wife. The hypotheses being tested are:Ho : Not guiltyHa : GuiltyWhen is a Type II Error made?Select one:a. If the man did kill his... more
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Probability Statistics

06/07/21

where is the critical region located?
A sample of 100 private school students were surveyed whether they planned to transfer to public schools in the incoming school year. Results showed that 40% of these students will transfer to... more
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06/07/21

In a one-tailed test, in which critical value listed below will the computed z of 2.313 fall in the acceptance region?
In a one-tailed test, in which critical value listed below will the computed z of 2.313 fall in the acceptance region?A. No answerB. 2.365C. 2.228D. 1.383E. 1.533
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Probability

06/06/21

The letters that form the word MATHEMATICS are placed in a bowl. Are the odds favorable or unfavorable that he will choose a letter that is a vowel followed by a “T”?

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Probability Statistics

06/06/21

You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria
You are a researcher studying the lifespan of a certain species of bacteria. A preliminary sample of 30 bacteria reveals a sample mean of ¯x=74x¯=74 hours with a standard deviation... more
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Probability Statistics

06/06/21

You measure 49 textbooks' weights, and find they have a mean weight of 65 ounces.

Assume the population standard deviation is 8.9 ounces. Based on this, construct a 99% confidence interval for the true population mean textbook weight.Give your answers as decimals, to two... more
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06/06/21

How do you calculate the confidence intervals for a population mean with only the sample mean and sample standard deviation?
I have a random sample and need to calculate the 95% confidence interval for the population mean(sample mean = 1076sample standard deviation = 80.61sample size is n=5)
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