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According to Chebyshev's theorem, what is the minimum probability that a random variable will be within 4 standard deviations of its mean?
Statistics and Probability, Statistics
A media rental store rented the following number of movie titles in each of these catagories: 160 horrors, 242 drama, 114 mystery, 308 romance, and 134 comedy. If a person selects a movie to rent, find the probability th ...
A researcher calculates a 90% confidence interval of (3397, 3421) to estimate the population birth weight using a random sample of 84 babies born to mothers with gestational diabetes. She wants to compare this range to t ...
1. A fencer attends a fencing tournament. To ensure the equipment works well, he takes three blades. Two of them will be the backup. The probability of his three blades to function properly are 0.95, 0.8, 0.7 respectivel ...
A manufacturer of matches randomly and independently puts 15 matches in each box of matches produced. The company knows that one-tenth of 6 percent of the matches are flawed. What is the probability that a matchbox will ...
A mail order supplier advertises same-day service on every order. Recently, the movement of orders has not gone as planned. The director of customer service has completely redone the method of order handling. The goal of ...
Find the z-score boundary that separates a normal distribution as described in each of the following: The lowest 20% of scores
A survey of a group of college students was done to find out how students get to school for the school year. 15% of those surveyed were from out of state. Of those that were in-state, 56% used a car as their primary form ...
Assume the probability of a male being 50 is 4.80%, and the probability of being female and > 50 is 8.00%. Based on this information and the information in the tables above, what is the probability that someone
A statistics student has collected data from a random sample of 20 college students at his school. He collected data on many variables including GPA (grade point average) and how many hours per week they play video games ...
A bullying prevention program is underway in the phoenix school districts. The researchers ran multiple analyses with the baseline data. The researchers want to determine if there is a relationship between age (13, 14, 1 ...
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