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A large university is interested in learning about the average time it takes students to drive to campus. The university sampled 238 students and asked each to provide the amount of time they spent
Test the claim that the population of earthquakes has a mean magnitude greater than 1.00. Use a 0.01 significance level, Identify the test statistic and P-value. Assume this is a simple random sampl
Suppose that certain tool bits are package 20 to a box, and the following sampling plan is used. A Sample of three tool bits is draw, and the corresponding box is accepted if and only if both bits
Listed below are brain volumes in cm cubed of unrelated subjects used in a study. Use a 0.01 significance level to test the claim that the population of brain volumes has a mean equal to 1099.5 cm c
How many tissues should a package of tissues contain? Researchers have determined that a person uses an average of 41 tissues during a cold. Suppose a random sample of 10,000 people yielded the foll
The goal was to determine if the average travel time of all the university's students differed from 20 minutes. Suppose the large-sample test statistic was calculated to be z = 2.14. Find the p-valu
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 = $63.50 and a standard deviatio
Use technology to find the P-value for a right nailed test with n=12 and t=1.318. How do you find this answer on a TI-84 calculator?
For the given binomial sample size and null-hypothesized value of p0, determine whether the sample size is large enough to use the normal approximation methodology to conduct a test of the null hypo
For many countries tourism is an important source of revenue. Data are collected on the number of foreign visitors to a country (in millions) and total tourism revenue (in billions of dollars) for a
Construct a 99% confidence interval for the population mean mu. ( , ) (Round to two decimal places as needed.)
A random variable X takes values between 0 and 4 with cumulative distribution function: F(x) = x2/16 for 0 ? x ? 4. What is the median of X?
The genes for eye color in a certain male fruit y are (R, W). The genes for eye color in the mating female fruit y are (R, W). Their offspring receive one gene for eye color from each parent. If an
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-