5,341 Answered Questions for the topic probability

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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Probability

06/05/21

A class of 20 boys and 10 girls has 15 Math majors and 15 Physics students. What is the probability of picking a student who is both a boy and a physics major? A physics major and a girl?
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Probability Statistics

06/03/21

A) Show that f(x) is a p.d.f. B) Determine b. C) Find the mean of X.
The diameter of an electric cable, say X, is assumed to be continuous random variable with p.d.ff(x)=6x(1-x), 0 \< x \<1.A. Show that f(x) is a p.d.fB. Determine a number b such that... more
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Probability Statistics

06/03/21

Find the probability.
A survey claims that 73% of Australia households have at least one credit card. Find the probability that in a random sample of 550 Australia households, 375 to 385 have at least one credit card.
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Probability Statistics

06/03/21

Find the standard deviation.
The average age of a breed of dog is 19.5 years. If the distribution of their ages is normal and 20% of dogs are older than 22.6 years, find the standard deviation.
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Probability Statistics

06/03/21

If 18 car owners are randomly selected, find the probability that at most two people have their cars washed professionally.
A study found that 28% of car owners in America had their cars washed professionally rather than do it themselves. If 18 car owners are randomly selected, find the probability that at most two... more
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Probability Statistics

06/03/21

What is the probability that 10 of the 12 hens will lay eggs on a given day?
The probability that a mature hen will lay an egg on a given day is 0.80. Hannah has 12 hens. What is the probability that 10 of the 12 hens will lay eggs on a given day?
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Probability Statistics Mathematics

06/03/21

Help me solve this statistics question.
A drinks machine dispenses coffee into cups. A sign on the machine indicates that each cup contains 50 ml of coffee. The machine actually dispenses a mean amount of 55 ml per cup and 10% of the cup... more
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