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You randomly sample 50 theaters in the United States. You ask those theaters how much they charge for a large popcorn, and you get a sample mean of $6. Then, you make confidence interval using this data with the lower limit at $4.50 and the upper limit at $7.50.
Solution to managerian stastics question. suppose that a consultant for the supermarket counts the number of arrival per hour during a sample of 150 hour.
the lifetimes of light bulbs of a particular type are normally distributed with a mean of 280 hours and a standard
Construct a frequency distribution of grouped scores with approximately 11 intervals.- Is the distribution symmetrical or skewed?
1. let x and y be bernoulli random variables. let z x ya. show that if x and y cannot both be equal to 1 then z is
Cholesterol, finis. Based on the regression output seen in Exercise 8, create a 95% confidence interval for the slope of the regression line.
What would happen if a neuron could fire during the absolute refractory period?
In a survey of 900 adults, 240 said that they watched the World Cup final on television. Using these sample statistics, calculate the margin of error, E, for a 90% confidence interval for the proportion of all adults that watched the World Cup final ..
A lot of 100 semiconducter chips contains 20 that are defective. Two chips are selected at random, withouut replacement, from the lot.
A steel ball weighing 128 pounds (mass= 4 slugs) is suspended from a spring. This stretches the spring 128/485 feet. The ball is started in motion from the equilibrium position with a downward velocity of 9 feet per second.
What is the probability that a pre-flop hand consists of a pair, that is, two cards of the same rank?- What is the probability that a pre-flop hand consists of two cards of the same suit?
Find p. Because the number of students varies from month to month, also find n, the average per month.- Make a p chart using control limits based on n students each month. Comment on control.
Let A denote the event that a 1 is obtained on the first roll, and let B denote the event that an even is obtained on the second roll. Find P(A and B).
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