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A chain is suspended between points at the same elevation and spaced a distance of 60 ft apart. If it has a weight per unit length of 0.5 lb/ft and the sag is v 3 ft, determine the maximum tension in the chain.
multiple choice questions based on regression.a regression and correlation analysis resulted in the following
Determine a 95% confidence interval of population mean birth weight in the Country A. Interpret it. Determine a 95% confidence interval of difference of population mean birth weight in the Country A and mean birth weight in the Country B
ABC Corporation of California publishes a variety of statistics, including the number of individuals who got a new job during the past 12 months and the mean length of time the individuals have been on the job.
N=120, population standard deviation is (known) 5, alpha =.05, standard error of the mean (sigma of xbar)= .46, h0 is rejected if xbar
a sample of n 8 scores has a mean of m 12. one new score is added to the sample and the new mean is found to be m 13.
We are interested in comparing the proportions of males and females who think earning a large salary is very important to them. I surveyed 200 of each gender and recorded their answers to the question as yes or no.
a nursing school wants to estimate the true mean annual income of its alumni. it randomly samples 120 of its alumni.
What proportion of a normal distribution is within one standard deviation of the mean?
How will this data help you to do your research? (Explain in some detail)
Construct a relative frequency histogram, a cumulative frequency histogram, a relative frequency (%) histogram, a cumulative relative frequency (%) his- togram, a frequency polygon, and a relative frequency polygon. Describe the shapes of these gr..
1. Cards are drawn one at a time, without replacement, from a deck of 52 cards until the first club card is obtained. Let X be the number of draws required. (a) Find the mass function of X .
Last week I used a stopwatch to measure the echo time of my snare drum in the hall outside my classroom, which is 80 meters long. The average echo time was 10 milliseconds.
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