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A survey of stock market investors revealed 30% of individual investors have used a discount account. In a random sample of nine individual investors, what is the probability that:
a. Exactly 2 of the individual investors have used a discount broker?
b. None of the 9 individual investors have used the discount broker?
c. Two or three of the individual investors have used a discount broker?
d. What is the mean for this distribution?
e. What is the standard deviation for this distribution?
suppose that the times people spend being served at a post office window are approximately normal with mean 1.5
assuming that both population s are normally distributed construct a 95 confidence interval about micro1 - micro2 .
Create a 90% confidence interval for proportion of all kernels that would not pop.
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a test score of 84 was transformed into a standard score of -1.5. if the standard deviation of test scores was 4 what
find the value of z that would be used to test the difference between the proportions given the following. use g - h.
Bell-shaped with a mean of $45, 000 and a standard deviation of $3, 500. What percentage of teachers earn anywhere from $38, 000 to $48, 500?
the monthly incomes for 12 randomly selected people each with a bachelors degree in economics are shown on the
The important thing is having a reason for picking the model that you decide on. You should choose a model for overall characteristics like a high R^2 value. Y
Determine the formula of the hydrate and also give the full name of the hydrate. Please provide a complete and easy to understand response.
the data below are yields for two different types of corn seed that were used on adjacent plots of land. assume that
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