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How many 3-digit numbers (from 100 to 999) do not contain even digits? (0 is considered an even digit).
according to a survey of the top employers in a major city in the midwest a worker spends a average 413 minutes a day
A grocery store carries the following items. There are two main categories of food - conventional and organic ingredients - and four food groups.
Luckily, Lucy has taken this course and knows that a z-score will help her understand Monica's reading score in relation to the population.
1. Let a random sample of size 17 from a normal population for which both mean μ and variance σ2 are unknown yield x = 3.12 and s2 = 1.04. Determine a 99% con?dence interval for μ.
How can we determine whether there are violations of the ANOVA model assumptions?- What should we do if such violations exist?
The amounts dispensed by a cola machine follow the normal distribution with a mean of 7 ounces and a standard deviation of 0.10 ounces per cup.
in a survey of 2000 adults 50 years and older of whom 80 were retired and 20 were pre-retired the following question
Find the upper and lower control limits for x and r charts for the width of a chair seat when the sample grand mean (based on 30 samples of 6 observations each) is 27.0 inches, and the average range is 0.35 inches.
A sample is selected from a population with a mean of µ = 40 and a standard deviation of σ = 8. If the sample has n=4 scores, what is the standard error of M
To determine the possible effect of a chemical treatment on the rate of seed germination, 300 chemically treated seeds and 250 untreated seeds were sown.
The difference in the percentage of participants who quit (20% versus 46%) was statistically significant. What conclusion can be made on the basis of this study?
The following data are monthly steel production figures, in millions of tons.- Draw a stem-and-leaf display of these data.
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