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Baaby Ruth candy Company claims its 8 ounce candy bar is very consistent if weighed. It claims population standard deviation of weights is less than 1 ounce. Sample of fifteen 8 ounce Baby Ruth candy bars are weighed and it is found sample standard deviation is 0.6 ounces. Test company's claim at (alpha sign) is 0.05.
Assume that the price of non-dividend paying stock is $32, its volatility is 30%, and the risk-free rate for all maturities is 5% per annum. Use derivagem to calculate the costs of setting up the following positions.
A shipment of 500 dolls is received by Panda Importers. The quality control manager selects a random sample of 75 to test. Five are bound to be defective. Construct a 90 percent confidence interval for the population proportion of defective dolls ..
Explain the differences between qualitative and judgmental statistical time-series, and explanatory/causal forecasting models.
how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?
At the .05 significance level, can we conclude that there is a difference in their mean times?
A fellow researcher fits a simple linear regression model Yi = α + βXi + ui by least squares, but has doubts that the first least squares assumption E(ui |Xi) = 0 is correct for her data set.
A sociologist wishes to conduct a poll to estimate the percentage of Americans who favor affirmative action programs for women and minorities for admissions to colleges and universities.
Ace Jack had no idea whether the $100,000 he pays for training for his used car salespeople works.
Suppose today's sample yielded a mean of $4.19 and a standard deviation of $0.10, create and interpret a 99% confidence interval for the population standard deviation. Assume the distribution of gas prices in the area follows a normal distribution..
Would it be reasonable to conclude that the population mean is 63 pounds?
What is the probability of randomly selecting a male from this group?
Develop a frequency distribution table with proportions. What is an experiment? Can you describe what a Group Frequency Distribution Table is and what it looks like?
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