8,958 Answered Questions for the topic statistics

Statistics

10/22/22

May I get help on this please?
A man claims to have extrasensory perception (ESP). As a test, a fair coin is flipped 20 times, and the man is asked to predict the outcome in advance. He gets 18 out of 20 correct. What is the... more
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Statistics

10/22/22

If x is a binomial random variable, compute P(x) for each of the following cases
P(x<or=3), n=8, p=0.4P(x)=?P(x>3), n=8, p=0.3P(x)=?P(x<1), n=8, p=0.3P(x)=?P(x>or=7), n=9, p=0.3P(x)=?
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Statistics

10/22/22

May I get help on this?

A quiz consists of 10 multiple-choice questions, each with 6 possible answers. For someone who makes random guesses for all of the answers, find the probability of passing if the minimum passing... more
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Statistics

10/22/22

If n=10, ¯ x (x-bar)=48, and s=17, construct a confidence interval at a 95% confidence level. Assume the data came from a normally distributed population.
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Statistics

10/22/22

Can I get help on this please? I'm not getting this.
Suppose it is believed that the probability a patient will recover from a disease following medication is 0.8. In a group of twenty such patients, the number who recover would have mean and... more
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Statistics

10/22/22

Suppose that you flip a coin 15 times. What is the probability that you achieve at least 6 tails?
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Statistics

10/22/22

Am I able to get help with this? I kept trying and I'm not getting it.
In the United States, voters who are neither Democrat nor Republican are called Independent. It is believed that 11% of voters are Independent. A survey asked 35 people to identify themselves as... more
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Statistics

10/21/22

If a candidate only wants a 2% margin of error at a 90% confidence level, what size of sample is needed?
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Statistics

10/21/22

elementary statistics

The random variable xx represents the number of received at a help desk in one hour, and it has a Poisson distribution with a mean of 15.6.What is the variance?variance = What is the standard... more
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Statistics

10/21/22

elementary statistics
For each of the following scenarios, determine whether the Poisson distribution is appropriate as a model for finding probabilities. A manufacturer of Christmas tree light bulbs knows that 3% of... more
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10/21/22

how are detection limits related to standard deviations and why does this relationship exist?
how are detection limits related to standard deviations and why does this relationship exist?
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Statistics Math

10/21/22

What is the average number of children Amy and Dan must​ have? (Integer or decimal. Do not round.)
Amy and Dan want to have both a male and a female child. If they decide to continue to have children until they have one of each​ gender, what would the average number of children​ be? Assume that... more
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Statistics

10/21/22

A particular professor has noticed that the number of people, P, who complain about his attitude is dependent on the number of cups of coffee, n, he drinks.
From eight days of tracking he compiled the following data:People (P) 12,10,8,8,7,5,4,2Cups of coffee (n) 1,1,2,3,3,4,4,5Unless otherwise stated, you can round values to two decimal places.a) Using... more
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Statistics Probability

10/21/22

Find population mean probability
Find the probability: We have N persons and Y boxes. What is the mean person’s probability of choosing the same box with another one? (I want the probability of the whole population, not the case... more
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Statistics

10/21/22

probability answer
 X is between 0.88 and 1.32 is:
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Statistics

10/21/22

I am very confused how to approach this question, I would appreciate a detailed step by step response if possible thank you : )
Andy is a restaurant owner. He believes 75% of his customers are satisfied with the food quality of his restaurant. From a random sample of 85 customers, what are the following probabilities?... more
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Statistics

10/20/22

Hypothesis testing with one sample

Based on a sample of 400 people 67% owned cats
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Statistics Algebra 2

10/20/22

I want to achieve 24 more wins than losses and I win 60% of the time, what is the fewest amount of games I need to play?
I want to achieve 24 more wins than losses and I win 60% of the time, what is the fewest amount of games I need to play?
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Statistics

10/20/22

Find the probability of patients who survived

Upon arrival at a hospital's emergency room, patients are categorized according to their condition as critical, serious, or stable. In the past year:• 2% of the emergency room patients were... more
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Statistics

10/20/22

Company life probability

11 percent of a certain company's life insurance policy holders are smokers. For each nonsmoker the probability of dying during the year is 0.009. For each smoker the probability of dying during... more
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Statistics

10/19/22

Sampling Distrubtions
On the distant planet Cowabunga, the weights of cows have a normal distribution with a mean of 597 pounds and a standard deviation of 75 pounds. The cow transport truck holds 5 cows and can hold a... more
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Statistics

10/19/22

Sampling Distrubtions
CNBC recently reported that the mean annual cost of auto insurance is $1042. Assume the distribution of auto insurance follows a normal distribution with a standard deviation of $287.Find the... more
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Statistics

10/19/22

Sampling Distrubtions
It is known that 20% of people ride public transport without paying for it. We talk to 63 people who have been on public transport in the last month. What is the probability that the sample... more
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Statistics

10/19/22

Statistics Class
An orange juice producer buys oranges from a large orange grove that has one variety of orange. The amount of juice squeezed from these oranges is approximately normally​ distributed, with a mean... more
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Statistics

10/19/22

Find values of x
The mean of a set of data 4,x+1,7,4 and (x²-1) is 9. Find the possible values of x
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