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Question: According to Mars, Incorporated, 20% of its plain M&M'S candies are orange. Assume that the company's claim is true. Suppose that you reach into a large bag of plain M&M'S (without looking) and pull out 8 candies. Let X = the number of orange candies you get.Orange M&M'S
(a) Explain why it is reasonable to use the binomial distribution for probability calculations involving X.
(b) Find and interpret the expected value of X.
(c) Find and interpret the standard deviation of X.
Carefully sketch a graph that includes the distribution of X if μ = 1250 and if μ = 1330. Shade in the areas that correspond to the probability of a type I error (0.01) and to the probability of a type II error found in part (b).
What can researchers do to minimize error variance?- Discuss the trade-off between internal and external validity. Which is more important? Explain.
The probability distribution for a discrete random variable X is given by the formula. Verify that this is a valid probability distribution
Describe the types of decisions that do not involve uncertainty and risk and common approaches used for analyzying them.
In a random sample of 250 senior students from your college, 40% reported that they had taken a statistics course. Give n and X for this setting.
Assume the shopping time followed an approximately normal distribution. Use a 5% level of significance to test the claim that the average shopping time foe women with children in Carson mall is higher than the national average for this type of sto..
Suppose that there are 40 students in a statistics class and their blood type follows the percentage distribution given in Exercise. (a) If we randomly select two students from this class, what is the probability that both will have the same..
the probability that a person owns a car pcar 0.80 that a person owns a boat pboat 0.30 and that a person owns both a
What are the conditions under which a moving-average control chart is preferable? Compare the moving-average chart with the geometric moving-average chart.
transit administration light-rail is one of the safest modes oftravel with an accident rate of .99 accidents per
What confidence level would you assign to the procedure in your example; that is, what percentage of the time do you think it produces your desired result?
Researchers at a pharmaceutical company have found that the effective time duration of a safe dosage of a pain relief drug is normally distributed with mean 2 hours and standard deviation of 0.20 hours. For a patient selected at random:
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