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Lake Wobegon Junior College admits students only if they score above 400 on a standardize achievement test. applicants from group A have a mean of 500 and a standared deviaton of 100 on this test, a
After listing the 16 different possible samples and finding the mean of each sample, construct a table representing the sampling distribution of the sample mean. In the table, values of the sample m
A drawer contains 10 red socks, 4 blue socks, and 8 black socks. Suppose you chose two socks at random. Find the following probabilities.
Suppose the problem statement is as follows. Roll two 6 sided dice and add the numbers on the faces. What is the total sample space S (A sample space is the set of all possible outcomes)? If we def
A survey of 865 voters in one state reveals that 408 favor approval of an issue before the legislature. Construct the 95% confidence interval for the true proportion of all voters in the state who
What is the probability that an aggressive dog is pure-bred? What is the probability that a mixed breed dog is not aggressive?
Is there sufficient evidence to con- clude that a majority of U.S. adults feel this way? Test the appropriate hypotheses using a .01 significance level.
Use the data to estimate the population standard deviation for the annual salary for head basketball coaches. What is the 95% confidence interval for the population variance?
Construct a 90% confidence interval estimate of the populatiion variance for the weight of this drug. Construct a 90% confidence interval estimate of the population standard deviation.
What is the probability that heads and tails occur equally often if the coin is fair and the tosses are independent?
Each of 12 ordered boxes contains 12 coins, consisting of pennies and dimes. The number of dimes in each box is equal to its order among the boxes, that is, box 1 contains one dime and 11 pennies,
For a population with a mean of µ = 60 and a standard deviation of ? = 24, find the z-score corresponding to each of the following samples
A physician wants to develop criteria for determining whether a patient's pulse rate is atypical, and she wants to determine whether there are significant differences between males and females. Use
Using statistical notation, specify the appropriate null and alternative hypotheses. Calculate the p-value for the hypothesis test.
What is the confidence interval for the population mean is there anything about this data set suggesting that the confidence interval might not be very good?
The contents of bottles of beer are normally distributed with a mean of ? and a standard deviation of ? = 5ml. What is the IQR of the distribution of all the average contents of all 6-packs? Use 3 dec
Identify the (statistical) population and the (statistical) sample.
What is the major difference between the dominance criterion and other decision-making criteria under uncertainty?
Use the moment-generating function technique to rework this problem
What is the slope and intercept for the least squares equation he would use to predict your final exam grade (Y) from your total points prior to the final (X)?
Compute 99% confidence intervals for the average daily maximum temperature in February for each of the three years in which you collected data. How do they compare? Show all work.
Derive expression for a and b in terms of standard deviation of x and y, mean of x and y, and the correlation b/w x and y. Given E(y|x)=a+bx.
Suppose that fty-two percent of the residents of the city Eugene think that Arizona will defeat Oregon in their next college football game. Find an appropriate estimate of the probability that great
Suppose a simple random sample of size 43 is selected from a population with sigma = 8. Find the value of the standard error of the mean in each of the following cases (use the finite population cor