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A sample of 176 randomly selected students, found that the proportion of students planning to travel home for thanksgiving is 0.61. What is the standard deviation of the sampling distribution?
Scores on a test are normally distributed with a mean of 60.9 and a standard deviation of 12. Find P81, which separates the bottom 81% from the top 19%.
a motor bike battery manufacturer found that the life of their batteries is normally distributed with a mean life span
twenty percent of all telephones of a certain type are submitted for service while under warranty. of these 60 can be
One-fourth of the residents of the Burning Ridge Estates leave their garage doors open when they are away from home. The local chief of police estimates that 5 percent of the garages with open doors will have something stolen
kilgallen inc. has the total inventory of 1000. currently kilgallen has this entire inventory stored in one warehouse.
Find a website related to your major that summarizes data and uses graphs, and share it with the class - Netiquette Guidelines listed in Getting Started module
The regulatory board of health in a particular state speci?es that the ?uoride levels in water must not exceed 1.5 parts per million (ppm). The 20 measurements given here represent the randomly selected daily early morning readings on ?uoride leve..
What is the population proportion, π?- What is the sample proportion, p?- What is the standard error of the sample proportion?
Given that this medication should be manufactured in a consistent way so that dosage amounts can be controlled, do the measures of variation seem to indicate that the variation is at an acceptable level? 672.2 679.2 669.8 672.6 672.2 662.2 662.7 6..
A study of 200 commercial firms revealed the data below. What is the probability that a particular firm will have 1 million or more in income after taxes?
In a shipment of 56 vials, only 13 do not have hairline cracks. If you randomly select one vial from the shipment, what is the probability that it has a hairline crack?
If 36 of these repair bills are randomly selected, find the probability that they have a mean cost between 271 dollars and 273 dollars.
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