Out of all of the 2010 murder cases, 28.8% killed by family members, 53% by acquaintance and the remainder by stranger. What's probability that a randomly selected murder victim was killed by stranger...
Out of all of the 2010 murder cases, 28.8% killed by family members, 53% by acquaintance and the remainder by stranger. What's probability that a randomly selected murder victim was killed by stranger...
I am interested in running an experiment in which 40 samples will be taken. If the samples are processed over a period of two weeks, how many days and samples per day should be tested? How did...
Study A and study B are tangentially related. If study A has an effect size of d = .25 and study B has an effect size of d = 1.08, what does that mean? What are some reasons why study B...
In a study, researchers tracked the number of errors made as participants completed 50 trials of the Stroop color task. All participants made 0, 1, or 2 errors during the 50 trials. Are the results...
Find the area under the standard normal curve which lies a.) to the left of 0.47 b.) to the right of z=-0.06 c.) to the right of z=2.53 d.) to the left of z=-1.31 e.) between z= 0.72 and z=1.59 f...
The average time a customer spends waiting in the check-out line at Wal-Mart is seven minutes. If wait times are independent and constant, what is the probability the customer will spend between eight...
A printing company makes pamphlets that cost $.75 per copy plus $5.00 as a setter's fee. If $80 were spent printing a pamphlet, how many pamphlets were ordered? Could this be set as...
For a fund raiser, the Science and Technology Club is selling raffles at the cost of six raffles for $5.00. It cost the club $250.00 for the prizes and tickets that will be given away. How many raffles...
For a 90% confidence level and a sample size of n, the margin of error is approximately 82/the square root of n %. Suppose you conduct a poll using a representative sample of 1000 people...
A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data below. Calculate the chi-square test statistic χ2 to test...
A coffeehouse wishes to see if customers have any preference among 5 different brands of coffee. A sample of 200 customers provided the data below. Calculate the chi-square test statistic χ2 to test...
Suppose an exam had an average (mean) score of 55% and a standard deviation of 15%. Table 6.3 Curving Grades A 1.5 standard deviations above the mean...
I have three independent variable conditions with 14 participants per group. Here are descriptive statistics: Group A: Mean .93, SD .62, Median 1, Mode 1 Group B: Mean .50, SD...
1. Use the frequency distribution to find the expected value (mean), variance, and the standard deviation. Number of downloads (X) 27 28 30 31 32 Probability (P(X)) 0.15 0.2 0.3 0.25 0.1 2...
Thanks! 2. You have $10,000 to invest. After some investigating, you found two investment opportunities. Bond A has a return of 6.5% with a default rate of 2%. Bond B has a return of...
During the 2013-2014 baseball season, Mark hit a home run 48 out of 60 times he was at bat. What percentage of Mark's times at bat did he not hit a home run? Confused at how to figure...
Information We then calculated the Tukey confidence intervals for the three groups. Grouping Information Using Tukey Method Shelf N Mean Grouping 2 21 9.619 A 3...
Question Information Do grocery stores shelve breakfast cereals (Frosted Flakes, etc.) aimed at children on the third (bottom) shelf and healthier cereals on higher shelves? We have...
What is the probability that more than 3 of them successfully stop smoking?
The time (in minutes) it takes to read Chapter 2 of a statistics textbook is recorded for 11 students: 32 25 37 29 54 21 29 30 35 18 47 a. Make a stem-and-leaf display of these data. b. Compute the...