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Inter arrival time of busses of route 49U of Milwaukee Bus System follows an exponential distribution. The probability that a bus arrives in 10 minutes is 0.2.
A certain office building infrequently experiences power outages. It is known that the probability of a power outage on any given day is 0.005, and power outages are independent of each other.
A sample of 2 of these items is selected from the lot without replacement. What is the probability distribution for the number of defective parts? Also, describe the sample space by letting c indica
Determine the probabilities that a rejected airfoil is from each of the three machines? Draw a tree diagram of the manufacturing and inspection process.
A test of H0: u=0 based on n=16 calculates tstat = 2.44. a) Determine the degrees of freedom for the test statistic. b) Provide the t values from the Table C that bracket the tstat.
Toss five fair coins, and let x equal the number of heads observed:Identify the sample points associated with this experiment, and assign a value of x to each sample point.
The lifespan of a particular brand of light bulb is normally distributed with a mean life of 400 h and a standard deviation of 12 h. Production for the last week was 800,000 light bulbs. Use this in
X and Y are independent. Both X and Y have an exponential distribution. If X had mean 3 and Y had mean -2. Find the moment generating function Z=X+Y
A normal distruibution of 640 observations has a mean of 1800 cm and a standard deviation of 90 cm. Draw a representative diagram for the distribution.
If the object is of type A, the measurement is normally distributed with mean 100 and standard deviation 25; if it is of type B, the 1measurement is normally distributed with mean 130 and standard
Suppose that n items are sampled from a manufacturing process and the number of defective items found among these is X. Denote the unknown true proportion of defective items by?
If a 6 person volleyball team is selected at random from the 15 club members, what is the probability the team consists of 4 men and 2 women?
Does a Euler path exist for this graph? Explain. Does an Euler circuit exist for this graph? Explain.
For an eight year period, Diane deposited $600 each quarter into an account paying 3.6% annual interest compounded quarterly. (round your answers to the nearest cent and show ALL work)
Describe the properties of central tendency and shape in numerical data. Explain how to find the range, variance, and standard deviation.
A company is producing two types of ski goggles. Thirty percent of the production is of type A, and the rest is of type B. Five percent of all type A goggles are returned within 10 days after the sa
You are a medical claims processor for Humana. Claims arrive at your desk at an average rate of three claims per day, but the actual number of claims fluctuates from day to day. You believe that the
Use the given values of n=93 and p=.25 to find the minimum usual value (mean-2 standard deviation) and the maximum usual value (mean + 2 standard deviation). Round your answer to the nearest hundret
A sample of 40 kids with chronic bronchitis are examined, and their mean peak expiratory flow is 279. Standard deviation is 7.1. Do children with chronic bronchitis have lower expiratory flow ? Alph
Estimate the population mean based on a sample of size 25 for which the average is 100 and the standard deviation is 25. Answer the following questions about constructing the 80 percent confidence i
Please give one example to explain the difference between an outlier and a data point with high leverage value. You can use numbers and graphs to help with the explanation.
When a newspaper article reports the results of a study and draws a conclusion without stating if the results are statistically significant what are the possible reasons for so doing? How seriously
What sample size would be required to reduce the standard deviation of the sampling distribution to one-half the value you found above. Justify your answer.
The drug price in a random sample of 16 retailers is on average $141. Standard deviation $4. If this is a random sample and the prices are normally distrubuted, construct a 95% confidence interval f
In a sample of 1000 fourth grade students, the average IQ score was 122. The prevailing view is that IQ is distributed normally with a mean of 100 and a standard deviation of 10. Draw a figure that