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Blood type AB is found in only 3% of the population†. If 275 people are chosen at random, find the probability of the following. (Round your answers to four decimal places.)
Create a binomial distribution. Compute the n at 10, 100, 1000 and 10,000.
You contact an economist who believes there is a 30% probability the economy will remain strong, a 60% probability the economy will grow at a moderate pace. and a 10% probability the economy will sl
The researchers found a significant difference between the two groups (control and treatment) for change in mobility of the women with osteoarthritis over 12 weeks with the results of F(1,22) = 9.61
Assuming all test scores are different, you would like to determine the relative test scores of three classmates using two facts. First, if Morgan's score is not the highest among the three, then Le
1. Provide one research hypothesis and an equation for each of the following topics:
What is the expected value of people who get a random number greater than 0.9? What is the probability that 3 or less students get a random number grater than 0.9?
The mean income per person in the United States is $37,500, and the distribution of incomes follows a normal distribution. A random sample of 12 residents of Wilmington, Delaware, had a mean of $46,
Identify the null hypothesis Ho and the alternative hypothesis H1. A cereal company claims that the mean weight of the cereal in its packets is at least 14 oz.
What is the distribution of the case described here? "Mr. HR hits a homerun in his turn at a baseball game with 5% of chance. He wants to know the distribution of chances he needs to have before hit
Let Xi be a random variable distributed normal mean i & variance i^2. Assume that the random variables X1, X2 and X3 are independent. Using these properties of X1, X2, X3:
(a) Draw the scatter plot for the variables. (b) Compute the correlation coefficient. Use three decimal places.
Using this sample, a 90 % confidence interval for the percentage of college students who smoke is found to be 17.79 % to 20.21 %. Based this interval, can we conclude that the claim that 17 % of all
Suppose you were given the task of estimating the proportion of drivers in Troy, AL who text while they drive. Discuss what factors you must consider and how you would accomplish this.
The heights and weights of 11 men between the ages of 21 and 26 were measured. The data are presented in the table below.
In designing a fraction non comforming chart with centre line at p=0.2 and three sigma control limits, what is the sample size required to yield a positive lower control limit? What is the n value n
Find the margin of error for the given values of c,s, and n c=0.80 s=4 and n=8 The margin of error is ____ (round to one decimal place as needed)
What is the total area under the normal curve?
Assume the random variable x is normally distributed with mean u=87 and a standard deviation o=5. Find the indicated probability P(73< x < 82) round to four decimal places
A population has a mean u=72 and a standard deviation o=25. Find the mean and standard deviation of a sampling distribution of sample means with sample size n=250.
Find the z-scores for which 12% of the distribution's area lies between -z and z. Use a comma to separate answers as needed. round to two decimal places as needed
For the standard normal distribution shown on the right, find the probability of z occuring in the indicated region. Its a bell shaped graph, everything to the left is shaded, and it has a number pa
Use a table of cumulative areas under the normal curve to find the z-score that corresponds to the given cumulative area. If the area is not in the table, use the entry closest to the area. If the a
a) The probability that the mean height for the sample is greater than 65 inches is