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Kindergarten children have heights that are approximately normally distributed about a mean of 39.7 inches and a standard deviation of 2.2 inches. If a random sample of 21 is taken, what is the prob
Suppose 13% of American adults believe that the highest priority of America is to protect freedom of speech. We will take a random sample of 20 American adults and ask them the question. Then the sa
In a poll, 1,003 adults in a country were asked whether they favor or oppose the use of federal tax dollars to fund medical research using stem cells obtained from human embryos. Among the responde
Assume the poisson distribution applies. Use the given mean to find the indicated probability.
Sketch a venn diagram of these events, Berkeley and Chelsea visited independently of one another.
What is the probability that "two" is the lowest number thrown? What is the probability that "five" is the highest number thrown and "three" is the lowest?
An observational study investigates the connection between aspirin use and three vascular conditions - gastrointestinal bleeding, primary stroke, and cardiovascular disease - using a group of patien
The mean incubation time for a type of fertilized egg kept at 100.3 F is 23 days. Suppose that the incubation times are approximately normally distributed with a standard deviation of 2 days?
Write the null and alturnative hypothesis, identify which is the claim. The results of a recent study show that the proportion of people who use seat belts when riding in a car or truck is 72%
A trucking firm delivers appliances for a large retail operation. The packages (or crates) have a mean weight of 291 lb. and a variance of 2704. (Give your answers correct to four decimal places.)
Select the appropriate gain to minimize the quantization error, and compute the quantization error as a percent of the maximum input voltage.
Consider again the study of the association between depression and cardiac disease survivability, which showed that of the 361 patients with no depression, 67 died. Of the 89 patients with minor or
Suppose two random variables X and Y are independent with X ~ N(2,4) and Y ~ N(0,3). W= (X-Y)/2
The distribution of the amount of money in savings accounts for University of Alabama students has an average of 950 dollars and a standard deviation of 1,000 dollars.
We will take a random sample of 50 American adults and ask them if they agree with the statement. Then the sampling distribution of the sample proportion of people who answer yes to the question is:
Please find the standard deviation and show your step-by-step method.
Describe the differences between discrete and continuous (normal) probability distributions. What are some business-related examples that make use of discrete and continuous (normal) probability dis
Explain why it is conventional to take the square root using the following set of measurements of pH in Waller Creek to illustrate your logic: pH measurements: 7.34 7.48 7.12 7.33 7.28 7.41 7.22 7.3
Sports Authority conducted a research about the demographics of their customers. For the study they collected data about the following variables: gender, marital status, credit rating (low, medium,
We rolled two six-sided dice, one with sides 1, 2, 2, 3, 3, 4 and the other with sides 1, 3, 4, 5, 6, 8. What is the distribution of the sum?
Find the mode of the number of particles to hit the counter. Find the chance that at most 5 particles hit the counter.
In the World Series of baseball, two teams A and B play a sequence of games against each other, and the first team that wins a total of four games becomes the winner of the World Series.
Suppose we roll one die repeatedly and let Ni be the number of the roll on which i first appears. Find the joint distribution of N1 and N6.
State your null and alternative hypotheses. Calculate the mean and standard deviation for each group. Compare the two group means and test your hypothesis. State your conclusion in terms of the hypot
A researcher is evaluating the influence of a treatment using a sample selected from a normally distributed population with a mean of u = 112 and a standard deviation of o = 33.