5,385 Answered Questions for the topic probability

Probability Math Statistics

05/02/22

The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 47 ounces and a standard deviation of 8 ounces.
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 47 ounces and a standard deviation of 8 ounces.Use the Empirical Rule to... more
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Probability Math Statistics

05/02/22

Company XYZ knows that replacement times for the quartz time pieces it produces are normally distributed with a mean of 12.5 years and a standard deviation of 0.6 years.
Company XYZ knows that replacement times for the quartz time pieces it produces are normally distributed with a mean of 12.5 years and a standard deviation of 0.6 years.(a) Find the probability... more
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Probability

04/29/22

Construct a 95% confidence interval for the population mean given the following
Construct a 95% confidence interval for the population mean given the following: sample mean = 16, population standard deviation = 1.5 and sample size = 49.
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Probability

04/29/22

probability of at least one secretary absent, at least one secretary comes to work and only one comes to work
A businessman has two secretaries. The probability that the one hired most recently will be absent on any given day is 0.08 and the probability that the other secretary will be absent on any given... more
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Probability Geometry

04/28/22

there is a six sided dice rolled 40 times what is the expiremental and theoretical probability of rolling a 6, 1 or 6, no more then 4, greater then 2.
number of dice frequency1            22            103             54             45            76            12
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Probability Math Statistics Maths

04/28/22

BBBASICSTAT8 6.2.501.XP
In the binomial probability distribution, let the number of trials be n = 3, and let the probability of success be p = 0.4012. Use a calculator to compute the following.(a) The probability... more
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Probability Math Statistics Maths

04/28/22

BBBASICSTAT8 6.2.018
The one-time fling! Have you ever purchased an article of clothing (dress, sports jacket, etc.), worn the item once to a party, and then returned the purchase? This is called a one-time fling.... more
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Probability Math Statistics Maths

04/28/22

BBBASICSTAT8 6.2.019.MI
Sociologists say that 95% of married women claim that their husband's mother is the biggest bone of contention in their marriages (sex and money are lower-rated areas of contention). Suppose... more
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Probability Statistics

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Probability Statistics

04/27/22

I need to know if the answer to this is 1, 2, 3, or 4
Mel has a bag containing white and yellow marbles.Mel randomly selects one marble from the bag,records the result, and returns the marble to the bag.The results of the first 65 selections are:A... more
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Probability

04/26/22

Probability of Having One Person in Your Class
If there are 2,945 people at a school and there are 6 periods with 35 people in each class, what is the probability of one specific person person being in my class?
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Probability Statistics Normal Curve

04/25/22

find the area of z=1.31 and sketch
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04/24/22

Please help me write the result of correlation coefficient of the research paper
https://drive.google.com/file/d/1_cs2AStcvpu4ZQaF9KramI4G45Qv3tr2/view?usp=sharing
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Probability

04/24/22

CONDITIONAL PROBABILITY
Rene and Chris went to a grocery store to buy drinks. They chose from 10 different brands of juice drinks, 6 different brands of carbonated drinks, and 3 different brands of mineral water. What is... more
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Probability

04/24/22

CONDITIONAL PROBABILITY/ MUTUALLY EXCLUSIVE EVENTS
The number of male and female students in section A whose favorite milk tea flavor is either chocolate or cookies and cream is shown below:Chocolate:Male: 8Female: 12Total: 20Cookies and... more
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Probability Math Statistics Maths

04/24/22

Show your answers by following the 5 steps of testing hypothesis.

Research suggests that most people need at least 7 hours of sleep each night in order to function well the next day. Some research suggests that lack of sleep can adversely affect health, memory,... more
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04/22/22

Show your answer by following the 5 steps in testing hypothesis.

Research suggests that most people need at least 7 hours of sleep each night in order to function well the next day. Some research suggests that lack of sleep can adversely affect health, memory,... more
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Probability Statistics

04/22/22

How many 5-letter words contain two vowels and three consonants?
In this question, words are sequences of letters from the English alphabet, vowels are the letters a, e, i, o, and u, and all the other letters are consonants. (a) How many 5-letter words contain... more
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Probability

04/22/22

Please help me.
The mean weight of 5-year-old children is 39.5 pounds and standard deviation is 3.2 pounds if a sample of 52 5-year-old children is selected find the probability that the mean of the sample will be... more
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Probability

04/21/22

Normal Curve Applications
The amounts of time per workout an athlete uses a stairclimber are normally​ distributed, with a mean of 24 minutes and a standard deviation of 7 minutes. Find the probability that a randomly... more
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Probability

04/20/22

Using the Standard Normal Table, determine the following:
a) P(z< -1.24)b)P(z < -3.01)c)P(z ≥ 2.21)d) P( -0.36 ≤ z ≤ 1.11)e) P( -0.75 ≤ z ≤ 0.75)
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Probability Math

04/20/22

Suppose that 52% of all students on campus wear glasses. If two students are chosen at random, what is the probability that both of them wear glasses?
Suppose that 52% of all students on campus wear glasses. If two students are chosen at random, what is the probability that both of them wear glasses?Give the answer as a decimal proportion, with 3... more
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Probability Math

04/20/22

Suppose you roll 2 dice. What is the pobability that the sum of the 2 dice is ≤ 4, given that the 1st dice is a 3?
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Probability Math Prealgebra

04/20/22

MATH PROBABILITY I need help pls
You roll a number cube twice. What is the probability of rolling two numbers whose sum is 2?Your answer has to be a fraction!
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Probability

04/19/22

For a random person from the population, what is the probability of being infected given that test result is negative?
In a certain pandemic, 80% of the people are not infected and only 3% of them test positive. 95% of the infected people test positive. For a random person from the population, what is the... more
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