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A physics lab instructor wants to estimate the time required for physic students to complete a required experiment. From a previous study she found the population standard deviation to be 16 min. How large a sample is required to be 90% confident that the point estimate is within 5 min of the population mean time?
explain how and why one is able to first distinguish a triploblastic embryo from a diploblastic
The distribution of IQ scores is normal, what proportion of the population would score higher than Bob? Lower than Bob?
Why do we have so many several measures of central tendency? Are all really essential or do they essentially give same information?
the average salary of produce workers at a local store for the selected periods are given
the revenues of the top eleven personal computer manufacturers are given in hundred millions15 17 23 26 27 35 72 88 91
bull construct a test of 20 objective type items in your subject. administer test to a group of 50 nbspstudents conduct
First part of this theorem allows a problem solver to compute probabilities about sample means regardless of whether a population is normally distributed.
WonderDrug Company wants to test the effectiveness of a new headache drug. What sampling technique (simple random, stratified random, cluster, convenience) is WonderDrug Company using in each of the following studies?
Determine the probability that a randomly selected exam will have a score of at least 71? What percentage of exams will have scores between 89 and 92?
if you want to be 95 confident of estimating the population proportion to within a sampling error of plus or minus 0.05
1. a medical researcher contends that lung capacity varies significantly between smokers and nonsmokers. the mean
use newtons law of gravitation to compute the work required to launch a 1000-kg satellite vertically to an orbit 1000
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