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Hurricane Katrina forced insurance companies to examine policy rates and originally determined that the average claim amount was $1900.00. A review of the average amount determined that the true mea
George said that Sam would need to determine whether his sample was from a normally distributed population because the population standard deviation was unknown. He said that Lou would not need to d
In the U. S. about 15% of the population is 65 years or older (senior citizens). It is estimated that 90% of seniors get a flu shot each year. It is also estimated that 45% of non-seniors get a flu
According to the National Institute on Alcohol Abuse and Alcoholism (NIAAA), and the National Institutes of Health (NIH), 41% of college students nationwide engage in "binge drinking" behavior, havi
Identify a quantitative variable (measurement) in your business/organization that has either interval or ratio level of measurement. Further, identify at least three meaningful groups into which th
It makes me wonder how we can predict somebody will be due to the past stats of that player. The stats may have some factor, but you cannot guarantee that an outcome will happen based on a previous
In a brand awareness study, if 25 of a group of 35 males identify the brand correctly and 15 of a group of 35 females identify this brand correctly, the chi-square value for this study is approximat
What condition is necessary in order to use z-test to test the difference between two means?
Discuss the implications of: magnitude (from 0 to 1); sign ( + or -); and probability versus causality for the Correlation Coefficient (also known as the Pearson Product-Moment Correlation Coefficie
Pick a card from a regular 52-card deck and record the suit, then toss a coin and record heads or tails. Let A be the event a club or spade is picked from a regular 52-card deck. Let B the event a h
In this activity, students are asked to design a hypothesis test, collect data, analyze the data and share a conclusion. The focus may be something used in everyday life and general in nature.
Identify the null and alternative hypothesis Show all work or no credit. Determine the test statistic.show all work or no credit. Determine the critical value. show all work or no credit
Describe some of the issues or concerns (at least three) which would be addressed in deciding how to perform a statistical test of a hypothesis:
Based on the data set provided, provide a substantive narrative explanation of the process involved in creating the frequency distribution table and the frequency histogram.
Calculate a 99% confidence interval for the true mean of a bearing's diameter when a sample of 16 of the bearings have a diameter mean of 3.42 mm and a std of 0.68 mm.
The population mean annual salary for flight attendants is $56,275. A random sample of 48 flight attendants is selected from this population. What is the probability that the mean annual salary of t
In a survey of 891 US adults who follow baseball in a recent year, 184 said that the Boston Red Sox would win the World Series. Construct a 90% confidence interval for the population proportion of U
The mean age at which men in the United States marry for the first time follows the normal distribution with a mean of 24.6 years. The standard deviation of the distribution is 2.6 years.
In an experiment to see if aspirin reduces the chance of having a heart attack, a placebo is:
A photo is taken of the meeting participants standing in a row. What is the probability that all of the managers will be side-by-side in the picture?
Evaluate the practice of altering the alpha level so that a two-tailed test will have a 5% rejection region on both sides of the curve for a total of 10% instead of having a 2.5% rejection region on
You want to test the effects of water aerobics on resting heart rate. You decide to test two different levels of exercise (water aerobics for 30 minutes twice a week and water aerobics for 60 minute
A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean SAT scores. Show al