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The portion of people aged 18 - 25 who currently use illicit drugs is equal to 0.20 (or 20%).Now express the null hypothesis H1 in symbolic form. Be sure to use the correct symbols -mean, p, standar
What is her minimax regret decision? (I've seen this answered other places as small but I find it to be the very large space because once the calculations are done that comes out to $210,000 where
Several statistical tests have a way to measure effect size. What is this, and when might you want to use it in looking at results from these tests on job related data?
In a study designed to test the effectiveness of acupuncture for treating migraines, 142 subjects were treated with acupuncture and 80 subjects were given a sham treatment.
A simple random sample of 40 salaries of NCAA football coaches as a mean of 415,953 and a standard deviation of 463,364. Construct a 95% confidence interval estimate of the new salary of an NCAA fo
A particularly long traffic light on your morning commute is green 20% of the time that you approach it. Assume the light status one morning has no effect on the light's status on a different mornin
Every generation faces new challenges and new problems. What do you think is the biggest difference between your generation and older generations? How do you think these differences will affect the
Suppose that the random variable X is the time taken by a garage to service a car. These times are distributed between 0 and 10 hours with a cumulative distribution function given by:
Tell me your top 5 ideas on how professors and teachers can use social media to enhance the learning process. List each idea and then briefly explain how it encourages students to learn
Suppose N=80,000, n=20,000, and s=50. Compute the standard error of x using the finite population correction factor. Round to four decimal places.
Find the 80th percentile for the average of these 49 marathons. (Round your answer to two decimal places.)
The IVs are ethnicity (Asian, White, African American, Hispanic) and gender (male vs female); the DV is serum cholesterol levels. The IV is smoking status - smokers vs non-smokers; the DV is health-
Orders for a tablet are summarized according to the choice of requested features. Thirty percent of the orders require no optional features, while 50% of the orders require only one feature. What i
Find the unexplained variation for the paired data. The paired data below consists of test scores and hours of preparation for 5 randomly selected students. The equation of the regression line is =
Determine what completes the following definition: The _____ is a measure of the differences between the observed sample y-values and the predicted values that are obtained using the regression equ
Suppose we wanted to compare the somatic complaints (as shown on a scale known as PSS) of 3 groups of people: non-smokers, smokers and poeple who recently quit smoking. Using the folowwing data for
Given the linear correlation coefficient r and the sample size n, determine the critical values of r and use your finding to state whether or not the given r represents a significant linear correlat
The average height of a woman aged 20-74 years is 64 inches in 2013. Suppose the height of a woman is normally distributed with a standard deviation of 2 inches. What is the probability that five w
Assume that the significance level is a=0.01. Use the given information to find the P-value and the critical value(s). With H1: p does not equal 2/5, the test statistic is z=-1.46. Please explain t
Perform a complete analysis and interpretation of the results. If appropriate, use diagrams or graphs. Ensure your answer is detailed in all aspects. Be sure to comment on the assumptions of the ANO
Assume that the salaries of full-time staff from the education department at your school have a normal distribution. A sample of fifteen salaries is chosen, and it is found that their mean salary is
The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is normally distributed with a mean of 1238 chocolate chips and a standard deviation of 122 chocolate chips. What is the pr
Let x be a random variable that represents the amount of a randomly selected monthly cell phone bill. We know that x has a normal distribution with a mean of µ = $67.50 and a standard deviatio
Three cards are drawn, without replacement, from a standard deck of fifty-two cards. Find the probability of these events.
In a doctor's office there are nine nurses and eight physicians. Six nurses and four physicians are females. If a person is selected from the doctor's office, find the compound probability that the