5,341 Answered Questions for the topic probability

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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11/09/20

DATA ANALYSIS ENGINEERING
A male fruit fly is equally likely to carry alleles a or b on the X chromosome. Allele a is lethalfor females, so if the male fruit fly carries a, all of its offspring will be male. If the male... more
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Probability

11/09/20

About probability
Consider a Bernoulli process with probability of success 0.7. What is the probability that there are 4 l’s and 3 O's in trials 36-42?
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Probability

11/08/20

Rules of Probability
Let E, F and G be three events in S with P(E) = 0.61, P(F) = 0.47, P(G) = 0.39, P(E ∩ F) = 0.3, P(E ∩ G) = 0.2, P(F ∩ G) = 0.18, and P(E ∩ F ∩ G) = 0.08. Find P(EC ∪ FC ∪ GC).P(EC ∪ FC ∪ GC) Can't... more
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Probability

11/08/20

Suppose that events F and S are conditional independent events given D and ~D respectively with p(F|D)=p(S|D)=0.9, p(~F|~D)=p(~S|~D)=0.9, and p(D)=0.2. Find p(D|F∩S)
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Probability

11/08/20

Conditional Probability
(a)    P(EC | F) (b)    P(FC | E)Any help is appreciated thanks. 
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Probability

11/08/20

Conditional Probability
Let P(E) = 0.25, P(F) = 0.45, and P(E ∩ F) = 0.15. Draw a Venn diagram and find the conditional probabilities.(a) P(F | E ∩ F)(b) P(EC | E )Any help is appreciated thanks.
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Probability

11/08/20

Rules of Probability
Let E, F and G be three events in S with P(E) = 0.61, P(F) = 0.47, P(G) = 0.39, P(E ∩ F) = 0.3, P(E ∩ G) = 0.2, P(F ∩ G) = 0.18, and P(E ∩ F ∩ G) = 0.08. Find P(EC ∪ FC ∪ GC).P(EC ∪ FC ∪ GC) Can't... more
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Probability

11/08/20

Rules of Probability
Let S = {a, b, c, d, e, f} with P(b) = 0.11, P(c) = 0.18, P(d) = 0.23, P(e) = 0.19, and P(f) = 0.16. Let E = {c, d, e} and F = {a, b, d, e}. Find P(a), P(E), and P(F).P(a)P(E)P(F)I found P(E).... more
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