275 Answered Questions for the topic Stats

Stats

02/17/16

Stats question
If X is a continuous uniform random variable taking values between 0 and 1, then the value ofthe probability P(X = 0.2) is? how do i calculate using ti-84?
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Stats

02/17/16

Stats question
Water bottles labeled 1.5 liter contain actual water amounts that are approximately Normally distributed with a mean of 1.55 liter and a standard deviation of 0.1 liter. Someone buys 4 water... more
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Stats

02/16/16

Employees at Starbucks
Employees at Starbucks in downtown Chicago have an average hourly wage of $10.00 with a standard deviation of $1.78. Find the hourly wages for the employees who have the following z scores.      ... more
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Stats

02/10/16

Probability
suppose test scores for a test are iniformly distributed between 53 and 83. Let X= tests scores. what is the probability a test score is at least 59 and no more then 68?
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Stats

02/01/16

I have no idea
The question is: the town of Dudley municipal bonds are yielding at 4%. Assume your federal tax rate is 22% and your state tax rate is 3%. What % (two decimal places) would you need to earn in a... more
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Stats

01/24/16

Probablility/STATS
The average composite ACT score for Ohio students who took the test in 2003 was 21.4. Assume that the standard deviation is 1.05. In a random sample of 25 students who took the exam in 2003, what... more
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Stats

01/24/16

PLEASE HELP!!!! Stats!
A company’s manufacturing process uses 500 gallons of water at a time, a scrubbing machine then removes most of the chemical pollutant before pumping the water into a lake. Legally the treated... more
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11/18/15

I dont understand what to do here.
A contractor is considering a sale that promises a profit of $34,000 with a probability of .7 or a loss (due to bad weather and such) of $5,000 with a probability of .3. What is the expected profit?
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11/17/15

Find a 90% confidence interval for the population average startup costs µ for candy store franchises
Do you want to own your own candy store? Wow! With some interest in running your own business and a decent credit rating, you can probably get a bank loan on startup costs for franchises such as... more
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11/17/15

Compute 95% and 99% confidence intervals for µ using Method 1 with a Student's t distribution!
When σ is unknown and the sample is of size n ≥ 30, there are two methods for computing confidence intervals for μ. Method 1: Use the Student's t distribution with d.f. = n − 1. This is the... more
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11/17/15

A farm brings 15 tons of watermelon to market. Find a 90% confidence interval for the population mean cash value of this crop. What is the margin of error? Hint
What price do farmers get for their watermelon crops? In the third week of July, a random sample of 38 farming regions gave a sample mean of x = $6.88 per 100 pounds of watermelon. Assume that σ is... more
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11/13/15

In the following problem, check that it is appropriate to use the normal approximation to the binomial. Then use the normal distribution to estimate the request
It is estimated that 3.2% of the general population will live past their 90th birthday. In a graduating class of 737 high school seniors, find the following probabilities. (Round your answers to... more
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11/05/15

Z-score Stats question
I have no idea evn how to start this question  The average Demand for renatl skis on winter Saturdays at a particular area is 150 pairs which has been quites stable over time. There is variation... more
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Stats

10/26/15

The mean annual tuition and fees for a sample of 11 private colleges was $34,100 with a standard deviation of $5400 A dotplot shows that it is reasonable to ass
The mean annual tuition and fees for a sample of 11 private colleges was $34,100 with a standard deviation of $5400 A dotplot shows that it is reasonable to assume that the population is... more
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Stats

10/13/15

A ferry will safely accommodate 70 tons of passenger cars. Assume that the mean weight of a passenger car is 1.8 tons with standard deviation 0.7 tons. If a
A ferry will safely accommodate 70 tons of passenger cars. Assume that the mean weight of a passenger car is 1.8 tons with standard deviation 0.7 tons. If a random sample of 35 cars are loaded onto... more
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Stats

10/05/15

The mean number of pets per household is 3.25 with standard deviation 1.3. A sample of 59 households is drawn. Find the 74th percentile of the sample mean.
The mean number of pets per household is 3.25 with standard deviation 1.3. A sample of 59 households is drawn. Find the 74th percentile of the sample mean.
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Stats

10/05/15

a sample size 85 will be drawn from a population with mean 22 and standard deviation 8. find the probability that x will be between 21 and 24
a sample size 85 will be drawn from a population with mean 22 and standard deviation 8. find the probability that x will be between 21 and 24
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Stats

10/04/15

a normal population has a mean of 39 and a standard deviation of 9 what is the probability that a randomly chosen value will be greater
a normal population has a mean of 39 and a standard deviation of 9.  What proportion of the population is less than 34?
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Stats

10/03/15

One normal curve has a mean of 22 and a standard deviation of 3. A second normal curve has a mean of 3 and a standard deviation of 22. The curve that is more di
One normal curve has a mean of 22 and a standard deviation of 3. A second normal curve has a mean of 3 and a standard deviation of 22. The curve that is more dispersed, or spread out, is
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Stats

10/03/15

For a normal distribution curve with a mean of 17 and a standard deviation of 3, which range of the variable defines an area under the curve corresponding to a
For a normal distribution curve with a mean of 17 and a standard deviation of 3, which range of the variable defines an area under the curve corresponding to a probability of approximately 68%?
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Stats

09/30/15

Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n =10, p = 0.1, P(3 or fewe
Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n =10, p = 0.1, P(3 or fewer)
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Stats

09/30/15

Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 10, p = 0.6, P(0)
Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 10, p = 0.6, P(0)
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Stats

09/30/15

Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 9, p = 0.1, P(Fewer tha
Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 9, p = 0.1, P(Fewer than 4)
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Stats

09/30/15

Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 11, p = 0.5, P(9 or mor
Determine the indicated probability for a binomial experiment with the given number of trials n and the given success probability p. n = 11, p = 0.5, P(9 or more)
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Stats

09/29/15

Question...
After the physical training required during World Ward II, the distribution of mile run times for male students at the University of Illinois was approximately Normal with mean 7.11 minutes and... more
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