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A simple random sample of 40 salaries of NCAA football coaches as a mean of 415,953 and a standard deviation of 463,364. Construct a 95% confidence interval estimate of the new salary of an NCAA football coach.
A telephone survey utilized a sampling frame of 2000 numbers, and had a response rate of 25%. A question asked respondents if they preferred Brand 1, Brand 2, or Brand 3.
samples of aircrew on long haul schedules are tested to assess the amount of time they spend in stage iv sleep. it has
Pilot sample of 30 items indicates a sample standard deviation of 900. Determine the required sample size if the confidence level is 90%.
Suppose also that we can buy a bond at time 0 for $.90 that will be worth $1 at time 1. What should the price of this option be? Does the assumption of no arbitrage answer this question?
assume that a quality characteristic is normally distributed. an x-bar control chart is constructed with 3 sigma
Some of the factors affect statistical power for a one sample t test. How does statistical power change (increase or decrease) for each of the following changes?
What is the correlation between x3 and x2 and what is the pdf of x?
Find the critical t alpha/2 assuming the population is normally distributed, the confidence level is 95%, n=101 and sigma is unknown.
In a distribution of sentence lengths in months like the following: 6, 12, 10, 18, 24, 360; which statistic would a researcher not want to report?
In a randomly controlled trial conducted with children suffering from croup, 46 randomly selected children were treated with ow humidity while another group of randomly selected children were treated with high humidity.
1.a researcher wishes to compare the effect of the rate of stepping on heart rate in a step-aerobics workout. a
an economist states that 10 of springfields labor force is unemployed. a random sample of 400 people in the labor
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