8,918 Answered Questions for the topic statistics

Statistics

06/21/23

Below is the distribution for a data set.
Below is the distribution for a data set. xP(x) 3 0.12 4 0.71 10 0.04 11 0.13 Calculate the standard deviation of the data set from this probability distribution. σ� =    [three decimal... more
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Statistics

06/21/23

Using the Binomial distribution with n = 6 and p = 0.6, calculate
Using the Binomial distribution with n = 6 and p = 0.6, calculate P(x < 6) =    [three decimal accuracy]
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Statistics

06/21/23

Below is the distribution for a data set.
Below is the distribution for a data set. xP(x) 4 0.18 5 0.14 8 0.41 9 0.27 Calculate the mean of the data set from this probability distribution. μ� =    [two decimal accuracy]
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Statistics

06/21/23

On average, the drive-up window at Dann's Doughnuts serves 12 customers between 3:00pm and 4:00pm.
On average, the drive-up window at Dann's Doughnuts serves 12 customers between 3:00pm and 4:00pm. a) What is the probability of exactly 22 drive-up customers between 3:00pm and 4:00pm [three... more
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Statistics

06/21/23

Below is a binomial distribution for n = 9 and p = 0.47.
Below is a binomial distribution for n = 9 and p = 0.47. Binomial Distribution # of... more
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Statistics

06/21/23

On average, 19 passengers arrive at Harvard Square Station between 4:00am and 5:00am.
On average, 19 passengers arrive at Harvard Square Station between 4:00am and 5:00am. a) What is the probability of exactly 17 passengers arriving between 4:00am and 5:00am [three decimal... more
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Statistics

06/21/23

A poll is given, showing 40% are in favor of a new building project.
A poll is given, showing 40% are in favor of a new building project.If 5 people are chosen at random, what is the probability that greater than 3 of them favor the new building project?
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Statistics

06/21/23

Using the Binomial distribution
Using the Binomial distribution,If n = 7 and p = 0.3, then calculate the following P(x less than 3) = [three decimal accuracy] P(x at most 3) = [three decimal accuracy] P(x = 3) = [three... more
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Statistics

06/21/23

The waiting times for commuters on the Red Line during peak rush hours follow a uniform distribution between 0 minutes and 12 minutes.
The waiting times for commuters on the Red Line during peak rush hours follow a uniform distribution between 0 minutes and 12 minutes.Compute the height of the uniform distribution.  Leave your... more
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Statistics

06/21/23

The time it takes me to wash the dishes on a randomly selected night is uniformly distributed between 8 minutes and 18 minutes.
The time it takes me to wash the dishes on a randomly selected night is uniformly distributed between 8 minutes and 18 minutes.What is the probability that washing dishes tonight will take me... more
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Statistics

06/20/23

Number of combinations without repetition
I have a database table that has 50 fields. what is the number of all unique combinations of the 50 fields I can use for filtering the data? for example I can use just field one. I can use... more
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Statistics

06/19/23

Elementary Statistics
When dragons on planet Pern lay eggs, the eggs are either green or yellow. The biologists have observed over the years that 19% of the eggs are yellow, and the rest green. Next spring the lead... more
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Statistics

06/19/23

Elementary Statisitics
The probability that you will win a game is p=0.19�=0.19.a) If you play the game 923 times, what is the most likely number of wins?(Round answer to one decimal place.)μ� = b) Let X� represent the... more
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Statistics

06/19/23

Elementary Statistic

A study was conducted to determine whether there were significant differences between medical students admitted through special programs (such as retention incentive and guaranteed placement... more
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Statistics

06/19/23

elementary statistics

A pharmaceutical company receives large shipments of ibuprofen tablets and uses this acceptance sampling plan: randomly select and test 21 tablets, then accept the whole batch if there is at most... more
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Statistics

06/19/23

For the following right-tailed test, given H0 : µ ≤ 135 vs H1 : µ > 135 with n = 59, α = 0.05, s = 10, and = 140. Find the observed power
a. 0.99b. 0.95c. 0.01d. 0.05
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Statistics

06/19/23

For the following right-tailed test, given H0 : µ ≤ 135 vs H1 : µ > 135 with n = 39, α = 0.05, s = 10, and = 140. Find the observed power
a. 0.81b. 0.19c. 0.93d. 0.07
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Statistics

06/19/23

Totally unhappy with first lesson

Your website states you will cover the first lesson if we were not satisfied. I did not see that info until after my card was charged. My daughter had a bad experience. I summarized the issues with... more
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Statistics

06/17/23

On average, a team roper misses 1.2 times per practice. Use the appropriate formula to find the probability that on a given practice this roper will miss exactly 3 times this practice.
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Statistics

06/17/23

Can anybody solve the following A-level statistics question please? I can't see how to find the variance/standard deviation
Data collected over a long period of time indicate that 23% of children contract a certain disease. Following a public awareness campaign, a doctor conducts a survey to find out whether this... more
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Statistics Math Probability

06/16/23

How do I find the total number of arrangements with multiple restrictions?
Q) Find the total number of different arrangements of the 8 letters in the word TOMORROW that have an R at the beginning and an R at the end, and in which the three Os are not all together.All I... more
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Statistics Math

06/15/23

Please help! : A simple random sample of size n-36 is obtained from a population that is skewed right with mean = 72 and SD = 12. (a) Describe the sampling distribution of #

A simple random sample of size n-36 is obtained from a population that is skewed right with mean = 72 and Standard Deviation = 12. Describe the sampling distribution of # What is P (× >... more
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Statistics Math

06/14/23

Assume the random variable X is normaily distributed with mean = 50 and standard deviation a = 7. Find the 97th percentile.
Assume the random variable X is normaily distributed with mean = 50 and standard deviation a = 7. Find the 97th percentile.The 97th percentile is___ (Round to two decimal places as needed)
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Statistics Math

06/14/23

Assume the random variable X is normally distributed with mean = 50 and standard deviation a = 7. Find the 67th percentile
Assume the random variable X is normally distributed with mean = 50 and standard deviation = 7. Find the 67th percentile The 67th percentile is ____ ( Round to two decimal places as needed)
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Statistics Math

06/14/23

The number of chocolate chips in an 18 ounce bag of chocolate chip cookies is approximately normally distributed with mean 1252 and standard deviation 129 chips. See description for details.

The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally distributed with mean 1252 and standard deviation 129 chips. What is the probability that a... more
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