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The weight of a product is normally distributed with a standard deviation of .6 ounces. What should the average weight be if the production manager wants no more than 5% of the products to weigh mor
David and melissa are out on a blind date. Melissa asks david if he can guess the day and month of her birthday.
A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value=30?
Determine the probability that a customer will buy at least one of these items: cigar or beer.
What is the expected value for playing roulette if you bet $8 on red? Round your answer to the nearest cent.
In a product liability case, a company can settle out of court for a loss of $350,000, or go to trial, losing $1,100,000 if found guilty and nothing if found not guilty. Lawyers for the company esti
An independent-measures research study uses a total of 18 participants to compare two treatment conditions. If the results are used to construct a 90% confidence interval for the population mean dif
Let X1, X2,...,X3 be a random sample from b(1,p) (i.e. n bernoulli trials). Thus Y=ΣXi is b(n,p). Show that X bar = Y/n is an unbiased estimator of p.
What fraction of all arrangements of GRACEFUL have no pair of consecutive vowels?
We roll a pair of dice. If the sum of the dice is 7, you pay me $32. If the sum is not 7, I pay you the number of dollars indicated by the sum of the dice. What is your expected value for the game?
Brown eyes are dominant over blue. That is, there are two alleles B and b. bb individuals have blue eyes but other combinations has brown eyes. Your parents and you have brown eyes but your brother
What is the critical value for a 96% confidence interval for a sample size of 20? (standard deviation unknown)
The test is designed to answer the question, "is the site feasible" In other words, is there sufficient evidence to conclude that the mean wind velocity exceeds 20 mph? Is there enough evidence furt
Predicting the outcome of a football game is using the subjective approach to probability.
If 5.6 feeder jams can be expected of a certain busy printer in a month, what is the probability that a roll will have at least 3 feeder jams?
A researcher reports an F-ratio with df = 2, 24 for an independent-measures research study. How many subjects participated in the entire study?
The following data were obtained in a study using three separate samples to compare three different treatments. Use an analysis of variance with α = .05 to determine whether there are any signif
Based on your answer to part A, would a two-tailed hypothesis test with α = .05 conclude that there is a significant difference between the two conditions? (Is µ1 - µ2 = 0 an accep
Make a point estimate of the population mean difference between the two test conditions. Please be detailed in your response.
Make a point estimate of the population mean difference between the two test conditions.
Use the data to estimate how many hours per day would be spent with the terry cloth mother for the entire population of infant monkeys. Make a point estimate and an 80% confidence interval estimate
A researcher has constructed an 80% confidence interval of µ = 45 ± 8, using a sample of n = 25 scores. What would happen to the width of the interval if the researcher had used 90% confi
A certain delivery service offers both express and standard delivery. 75% of parcels are send by standard delivery and 25% are send by express. Of those sent standard, 80% arrive the next day, and o
In order to control costs, a company wishes to study the amount of money its sales force spends entertaining clients. The following is a random sample of six entertainment expenses (dinner costs for
Why must assumptions be checked when finding confidence intervals and conducting statistical tests? Why do we need to consider the distribution of the test statistics under the assumption that H0 is