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It has been recorded that 10 people get attacked by shark attacks every year. What is the probability of having 5 or 6 people get killed by a shark attack this year?
All points on the X and R charts fell in the control limits. The specification limits for the weight of the engine are 823 17 lbs. If the weight is normally distributed and distribution is centered
A system compromised of five components. Each of which is either working or failed. Consider an experiment that consists of observing the status of each component, and let the outcome of the experim
On their first date, Kelly ask mike to guess date of her birth, not including the years. Determine the probability that mike will guess correctly (ignore leap years).
Between what two scores symmetrically distributed around mean will 50% of people IQ scores have? Find out the interquartile range of this IQ score distribution.
A psychologist is planning the study on the effect of motivation on performance of attention task. In this task, participants try to determine target letters in the stream of letters passing by at t
Formulate both the numerical and verbal hypothesis statement about your research issue. Include raw data tables and results of the computations of your z-test or t-test using graphical and tabular t
Determine the mean associated with the critical z value on the distribution of means for the comparison distribution?
A psychologist is planning the study on effect of motivation on performance of an attention task. In this task, participants try to identify target letters in a stream of letters passing by at a rap
A pizza restaurant manager claims that the average home delivery time for their pizza is no more than 20 minutes. A random sample of 49 home delivery pizzas was collected.
Suppose X, the lifetime of the certain light bulb, is normally distributed with mean 160 hours as well as standard deviation 30 hours. A randomly selected bulb is observed to be still working after
If a random variable X has the uniform (0,1) distribution and Y=2X-1. Find P[Y≤y] for all such values y by reexpressing the inequality in terms of X. Use this to find the probability density func
How many of these customers would you anticipate to make a purchase of at least $50? Determine the probability exactly five of these customers make a purchase of at least $50. Compute the probability
Compute the probability that at least one person will have type A? Determine the mean number of people with type A? Determine the standard deviation?
A market research company is interested in the whether or not households in Franklin County, Ohio have cable television. Using county auditor's list of households the researcher randomly chosen 100
The population may not be normal, but the Central Limit Theorem applies. Thus she should calculate the confidence interval as normal. The population might not be normal, and the Central Limit Theore
A confidence interval estimate for the population mean is given to be (36,25,44,76). If the standard deviation is 17.803 and the sample size is 48.
When the truckload of peaches arrives at packing plant, a random sample of 125 is selected as well as examined. The whole truckload will be rejected if more than 8% of the sample is unsatisfactory.
Based upon these 100 observations, is a Poisson distribution with the mean 1.2 an appropriate model? Carry out a goodness-of-fit procedure with a = 0.05. Compute the test statistic chi-squared.
A study was conducted to determine the mean amount spent on birthday gifts for a typical family having two children. A sample of 195 was taken, and the mean amount spent was $182.25. Supposing a sta
By measuring amount of time it takes component of product to move from one workstation to the next , an engineer has estimated that the standard deviation in 2.83 seconds.
A student takes the 20-question multiple choice exam as well as guesses on each question. Each question has 4 choices, only one of which is correct. Find out the probability that the student makes a
Consider a normal population with μ=25 and σ=8.0. Calculate the standard score for a value x of 23
Find out the communicating classes, and classify the states: provide the period of each state, and classify each state as transient or recurrent. Find out the steady state probabilities.
Assume that an intelligence test is constructed to have the normal distribution with mean of 100, and standard deviation of 15. Between what two scores symmetrically distributed around mean will 50% o