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Question: Shares of company A are sold at$10 per share. Shares of company B are sold at$50 per share. According to a market analyst, 1 share of each company can either gain$1, with probability 0.5, or lose$1, with probability 0.5, independently of the other company. Which of the following portfolios has the lowest risk:
(a) 100 shares of A
(b) 50 shares of A + 10 shares of B
(c) 40 shares of A + 12 shares of B
A researcher is interested in estimating noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviation is 4.13, how large a sample is required to get the desired information..
a friend of mine is giving a dinner party. his current wine supply includes 9 bottles of zinfandel 10 of merlot and 11
Find the percentages for the first day of this month and compare them to last year's percentages for this month.
Describe the sampling distribution for the statistic of interest in each of the following stories, including numerical values for the mean and standard.
a. Select the variable Sales. Develop a frequency distribution and histogram for Sales. b. Compute the mean, median, and standard deviation for the Sales variable. c. Determine the interquartile range for the Sales variable.
a population has a mean of 100 and standard deviation of 20. if you select a single score from this population on the
Post a behavioral research situation that could use a Pearson coefficient research study and a chi square research study. Present the rationale for each selection. Be very specific in your presentation
1. Given the mean equals to 33.1, and s = 1.56, compute the 99 percent and 90 percent confidence intervals for sample size n = 121. 2. Use one example to explain the differences between Type I error and Type II error and their relationship to the ..
College admissions. For high school students graduating in 2007, college admissions to the nation's most selective schools were the most competitive in memory.
a. What is the independent variable in this study? b. What is the dependent variable?
researchers conducted an experiment in which hydrogen concentration in 20 different specimens was measured by gas
Using your conclusion from part (a), conduct the appropriate test for evidence that the mean time to complete Form 1040 for the lower-income level is less than the mean time for the higher-income level.
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