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Every Normal model is defined by its parameters: the mean and the standard deviation.
Suppose that the mean ?= 20, and that 45% of the area is above 30. What is the standard deviation?
A) 60
B) 70
C) 80
D) 90
Statistics and Probability, Statistics
In a single? season, an average of 2.4 home runs were hit per game. Assume the number of home runs per game follows the Poisson distribution. ?a) What is the probability that 6 home runs will be hit in a randomly selecte ...
Data are collected on the relationship between the number of hours per week practicing a musical instrument and scores on a math test. The line of best fit is as follows: y = 72.5 + 2.8x. What would you predict the score ...
In this question are you just using the empirical rule? You know that your population is normally distributed with a mean of 100 and a standard deviation of 15. Using the empirical rule as a rough approximation, what is ...
Discuss if you think policy makers truly represent the citizenry or are they pressured by third party special interest groups that support their campaigns. Should they represent both?
How can a graph or chart of data help you understand the results? What is a frequency table? Describe an example where a frequency table can be used in life.
With a die being rolled. The set of equally likely outcomes is? {1, 2? 3, 4? 5, 6}. Find the probability of getting a 10.
A researcher working at a particular company wants to know if workers' health would improve if they were given extra days 'off. In this company, all workers undergo a standard physical exam twice a year and after each ex ...
A coin is randomly picked from a collection of 10 coins, the ith coin having a probabiliity i/10 of coming up heads. The coin in then flipped repeatedly until a head appears. Let X be the number of flips necessary. Find ...
An annual survey of first-year college students ask 273,000 students about their attitudes on a variety of subjects. According to a recent survey, 57% of first-year students believe that abortion should be legal. Use 0.0 ...
You have two investments that either make money or lose money. Each one has a 60 percent chance of making money, and a forty percent chance of losing money. There is a 30 percent chance that both investments make money. ...
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Why might a bank avoid the use of interest rate swaps, even when the institution is exposed to significant interest rate
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