5,385 Answered Questions for the topic probability

Probability

11/15/20

Does the compound event consist of two mutually exclusive events? Two dice are rolled. The sum of the dice is a 5 or a 6. Compute the probability of the compound event occurring.
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Probability

11/15/20

Evaluate the expression. C(8, 6) · C(7, 5) /C(9, 5)
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Probability

11/15/20

A professor gives his students 9 essay questions to prepare for an exam. Only 4 of the questions will actually appear on the exam. How many different exams are possible?

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Probability

11/15/20

Probability- Calculus
Find the probability that when two 8 sided dice are rolled, the sum of the numbers on the top faces is greater than 13.
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Probability Statistic

11/14/20

Find probability
The faculty of a small eastern university is considering adding grade point average within a student's major to each transcript. You have been asked to sample students to determine student... more
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Probability

11/14/20

Probabilty question nunber 4
A psychology class has 28 males and 52 females. If the professor selects names from the class list using random sampling.a. What is the probability that the first student selected will be a... more
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Probability

11/13/20

Probability of testing samples
For 4 and 5, use the following information: According to the Florida Department of Health, the positive rate for coronavirus tests on Wednesday was 7.75%. Suppose 435 people in... more
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Probability Statistics

11/12/20

Statistics and Probability
A box contains ten numbered balls – one ball with the number 1, two balls with the number 2, three balls with the number 3 and four balls with the number 4. You will randomly select two balls from... more
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Probability Statistics

11/12/20

Can someone help me work through this probability problem?? please and thank you
Can someone walk me through how to solve this problem? I keep getting it incorrect and I don't understand what I'm doing wrong (please show work)."The time (in minutes) until the next bus departs a... more
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Probability

11/12/20

probability in biostatistics
Drug A has probability of 0.67 of curing COVID-19 whenever it is administered. If drug A is administered 4 times, find the probability that drug A will cure COVID-19 when administered; a) Exactly 2... more
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Probability Math

11/12/20

Math Probability

If a bag contains 4 twix, 5 snickers and 8 milky way...Select one candy bar, observe the outcome, replace it and select another one. Calculate the probability of choosing two twix??
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Probability

11/12/20

Find the probability of drawing a Diamond card on the first draw, replacing it and drawing a face card on the second draw.
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Probability Math Statistics

11/11/20

Math Question, need help
Out of 500 people sampled, 135 preferred Candidate A. Based on this, estimate what proportion of the voting population ( p ) prefers Candidate A. Use a 90% confidence level, and give your... more
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Probability Math Statistics

11/11/20

Express the confidence interval ( 76.1 % , 90.5 % ) in the form of ˆ p ± M E .
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Probability Math Statistics

11/11/20

Statistics Question

A political candidate has asked you to conduct a poll to determine what percentage of people support her.If the candidate only wants a 6% margin of error at a 99% confidence level, what size of... more
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Probability Math Statistics

11/11/20

I need help on this question

Out of 500 people sampled, 180 had kids. Based on this, construct a 99% confidence interval for the true population proportion of people with kids. Give your answers as decimals, to three places ... more
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Probability Math Statistics

11/11/20

In a recent poll, 350 people were asked if they liked dogs, and 52% said they did. Find the margin of error of this poll, at the 99% confidence level. Give your answer to three decimals
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Probability Math Statistics

11/11/20

I need help on this question
The mean daily production of a herd of cows is assumed to be normally distributed with a mean of 38 liters, and standard deviation of 4.4 liters.A) What is the probability that daily production... more
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Probability Math Statistics

11/11/20

Statistics Question, Read Description

In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 55.7 inches, and standard deviation of 4.8... more
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Probability Math Statistics

11/11/20

A high school baseball player has a 0.304 batting average. In one game, he gets 8 at bats. What is the probability he will get at least 6 hits in the game?
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Probability Statistics

11/10/20

Expected Value and Probability

Z -2 0 1 3 4P(z) .2 .3 .3 .1 .1Find E((z+3)(z-1))
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Probability Math Statistics

11/10/20

Test statistic statistics

You are testing the claim that the mean GPA of night students is different than the mean GPA of day students.You sample 45 night students, and the sample mean GPA is 2.03 with a standard deviation... more
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Probability Math

11/09/20

Probability of winning question
If there are 5 separate questions to pick the right answer.50% of people picked the first question right.58% of people picked the second question right.34% of people picked the third question... more
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Probability

11/09/20

Probability question
1. Let P(A)=p, P(A|B)=q, P(B|A)=r. Find the relations between the number p, q, r for the following... more
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Probability Statistics

11/09/20

DATA ANALYSIS ENGINEERING

The prevalence of a certain type of cancer among women aged 50–60 is 1 in 150. A bloodtest will be positive 98% of the time if the cancer is present, but is also positive 7% of thetime if the... more
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