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Consider a set of test grades with a mean of 80 and a standard deviation of 3. Use Chebyshev's Theorem to find the percent of data that would fall between 74 and 86.
A. at least 88.9%
B. 100%
C. at least 75%
D. at least 93.8%
Statistics and Probability, Statistics
The lifetime of a particular type of light bulb are approximately normally distributed with a mean of 1200 hours and a standard deviation of 140 hours. a) Find the probability that a randomly chosen bulb will burn longer ...
The mean of a population of raw scores is 50 (ox=18). What is the probability of randomly selecting a sample of 40 score having a mean above 46?
Research research and Sample 5000 household concerning TV shows they watch. Based on the sample 18% reported watching 60 Minutes. What is the 95% confidence interval for the proportion of all Americans that watch 60 minu ...
What are the uses and value of statistical significance testing and the p-value as demonstrated in the various analytical techniques (t-tests, ANOVA, chi-square, etc.). What's the fundamental reason we apply these techni ...
The risk-free rate of return is 5.2 percent and the market risk premium is 8.4 percent. What is the expected rate of return on a stock with a beta of 1.34?
A restaurant manager classifies customers as regular, occasional, or new, and finds that of all customers 50%, 40%, and 10%, respectively, fall into these categories. The manager found that wine was ordered by 70% of the ...
A company employs eight people and plans to select a group of five of these employees to receive advanced training. How many ways can the group of five employees be selected?
Introduction to Statistics Assignment - Inferential Statistics Analysis and Writeup Purpose: The purpose of this assignment is to develop and carry out an inferential statistics analysis plan and write up the findings. T ...
The number of accidents in a day in town A is given by X , and the number of accidents in a day in town B is given by Y . The joint probability function for X and Y Y is f ( x , y )=964 x ! y ! for x =0,1,2,3 an ...
The probability of someone ordering the daily special is 52%. If the restaurant expected 96 people for lunch, how many would you expect to order the daily special?
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