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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
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
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?
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
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
Use a 0.05 significance level test the claim taht the three cateogries of blood lead level have hte same mean full IQ score. Does it appear that the exposure to lead has an effect on full IQ scores?
In the formula for a variance, what is the sum if we dont square the (x-u) values? Hint: there is a special name for this sum.
Conduct the hypothesis test and provide the test statistic, critical value, and or p value and state the conclusion.
Use the value of linear correlation coefficient r to find the coefficient of determination and the percentage of the toal variation taht can be explained by the linear relationship between two varia
Suppose the heights of 18-year-old men are approximately normally distributed, with mean 68 inches and standard deviation 2 inches.
Find the value of the linear correlation coefficient r then determine whether there is sufficient evidence to support the claim of a linear correlation between the two variables.
Show the Hypotheses, the Claim, the Test statistic, the df, the p-value, the decision, and the conclusion. What kind of Chi-Square test is this?
Construct a 99% confidence interval estimate of the mean of the differences between volumes for the first born and the second born twins. What does the confidence interval suggest?
Test the given claim using the p value method or critical value method. Construct a confidence interval suitable for testing the given claim.