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Question: For each of the following, indicate whether the variable is ordinal or not. If the variable is not ordinal, indicate its variable type.
a. Whether or not the person believes in love at first sight.
b. Student rating of teacher effectiveness on a 7-point scale where 1 not at all effective and 7 extremely effective.
c. Number of text messages received in a day.
using the traditional formula a 95 ci for p1 - p2 is to be constructed based on equal sample sizes from the two
What size sample would be required to estimate the proportion of hospital referrals with a margin of error of 0.04 or less at 95% confidence?
if you could stop time and live forever in good health what age would you pick? answers to this question were reported
A plot of the points (x,f), where x represents the class mark of a given class in a frequency distribution and f represents its frequency, is called a frequency polygon. Construct a frequency polygon using the data in Exercise 116.
The standard deviation is estimated to be 0.279. Use the 99% level of confidence.
The purchasing company can detect the defective wiring. What is the probability that the purchasing company will find the following?
a random sample of n 35 observations from a quantitative population produced a mean x2.4 and a standard deviation
the average length of corn snakes in okoboji is supposedly 20 inches and the standard deviation is known to be 3.3
Sugar packaged by a certain machine has a mean weight of 5lb and a standard deviation of 0.02 lb. For what values of c can the manufacturer of the machinery claim that the sugar packaged by this machine has a weight between 5 - c and 5 + c lb with..
producers of pvc pipes want to have a supply of pipes sufficient to meet marketing needs. they wish to survey
The article "Modeling Sediment and Water Column Interactions for Hydrophobic Pollutants"(Water Research [1984]: 1169-1174) suggests the uni- form distribution on the interval from 7.5 to 20 as a model for x = depth (in centimeters) of the bioturbatio..
then lengths of a certain component are normally distributed with a mean of 250 mm and a standard deviation of .6mm.
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