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A and B could have a relationship that is negative meaning they are headed in opposite directions or positive meaning there are headed in the same direction but A and B could have a relationship bec
Generate 10,000 received waveforms and plot their histogram. The receiver assume the transmitted bit is 1 if r(n)>0, and transmitted bit is 0 if r(n)<0. Compute the bit error probability.
The numbers 8, 9, 10, and 12 are written on separate pieces of paper and put into a hat. Two pieces of paper are drawn at the same time and the product of the numbers is recorded. Find the sample sp
What is the maximun mean score that you could have after the next quiz? What is the minimum mean score that you could have afterthe next quiz?
The number of viewers of American Idol has a mean of 29 million with a standard deviation of 10 million. Assume this distribution follows a normal distribution. What is the probability that next wee
What value would be the cutoff for the top 10%, if you have a mean of 10 and a standard deviation of 2?
Assume that the mean hourly cost to operate a commercial airplane follows the normal distribution with a mean of $2,225 per hour and a standard deviation of $195. What is the operating cost for the
An April 15, 2002 report in Time Magazine stated that the average age for women to marry in the United States is now 24.4 years of age. If the standard deviation is assumed to be 4.8 years, find the
A survey is to be made of the prevalence of the common disease in a large population. For any disease that affects atleast 1% of the individuals of the population, it is desired to estimate the tota
If the standard deviation for the number of televisions in a U.S. household is 1.3 and a random sample of 90 American households is selected, the mean of this sample belongs to a sampling distributi
Write out the appropriate null and alternative hypotheses for this test. If you use variables, be sure to define what they represent.
Write out the expected counts under the null hypothesis and calculate the chi-squared test statistic. Calculate a p-value and make a decision.
The media often attempts to predict the outcome of national elections. Why are they often wrong? Based on the concepts presented in this module's readings, how could the system be improved?
A population of scores with mu = 50 and sigma = 6. The distribution of sample means based on samples of n=36 deleted from a population with sigma = 6 and mu = 50
What are the strengths and weaknesses of correlational and regression studies. What are the concepts of positive and negative correlations, correlation coefficients, confounding, and causality.
The number of power outages at a nuclear power plant has Poisson distribution with a mean of 0.8 outage per month. What is probability that there will be at least 3 power outages in the next year? P
For a population with a mean of =80 and a sd =12, find the z-score corresponding to each sample mean.
Describe the distribution of sample means based on samples of n=36 selected from this population. Of all the possible samples of n=36, what proportion will have sample means greater than 43?
Before receiving the result the physician assigned his patient to the low-risk group (defined on the basis of several variables) with only a 0.5% probability of having HIV. What is the probability t
(a) Describe the distribution of x, height of male college students. a) skewed right
Estimate the mean difference PCB concentration for the fish in the two rivers using a 99% confidence interval.
Estimate the mean difference in pH level for the two years using a 99% confidence interval.
How many different passwords could be made using only these letters? (Ignore the possibility of repeats of letter which are finally used when they crack the code)
What is the probability that the number of uninsured drivers is at most 15? (Use the normal approximation.) What is the probability that the number of uninsured drivers is between 20 and 25? (Use the
If in reality 54% of the residents oppose building the factory in the community, use the normal approximation to the binomial, with the correction for continuity, to approximate the probability that