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In a normal distribution, what z-score value separates the highest 40% of the scores from the rest of the distribution?
The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50. What is the probability that a student uses fewer than 600 minutes?
Approximately normally distributed with σ=10. Determine the probability that a randomly selected chocolate bar will have: 4.3 more than 155 calories.
life expectancies for men and women were measured by country. it was found that the average male life expectancy was
the probability that an individual has 20-20 vision is 0.15. in a class of 50 students what is the mean and standard
An experiment was conducted to compare the effects of two teaching styles for grade 12 mathematics. the individuals in experiment were grade 12 math students from one particular high school.
The mean monthly demand for steam boilers is 6.8 with a standard deviation of 1.7. Compare the dispersion of these distributions. Which demand pattern has more relative variation? Explain.
question the temperature in january is estimated to have a mean of 34 and a standard deviation of 6 in degrees
Write a short paragraph that highlights your understanding of why exploratory data analysis is a critical part of any analytical strategy- create a scatterplot that includes a regression line. The variables you will use are: Exam Performance and Ex..
Set up the null and alternative hypotheses to test whether the proportion of MBA students who expect to stay at their first job five years or more is less than one-fourth of all U.S. MBA students.
A polling company obtains an alphabetical list of names of voters in a precinct. They select every 20th person from the list until a sample of 100 is obtained.
the average weekly stock prices of overseas trading inc. a u.s. based multinational company can be estimated from
a single strain gage has a nominal resistance of 120 ohm. for a quarter bridge with 120 ohm fixed resistors the voltage
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