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An economist found that a random sample of 42 high school teachers had an average annual salary of $56,490. A previous study showed that the population standard deviation is $4150. Find a 99% confidence interval for µ, the mean annual salary of all high school teachers.
for a population with a mean of micro 70 a score of x 62 corresponds to z -2.00. what is the population standard
Let R be a unique factorization domain then show that prime element R generates a prime ideal.
blaymount amateur dramatic society is staging a play and wants to know how much to spend on advertising. its objective
Each headlight on an automobile undergoing an annual vehicle inspection can be focused either too high (H), too low (L), or properly (N). Checking the two headlights simultaneously (and not distinguishing between left and right) results in the six..
Draw a histogram of this data. Be sure to give labeled scales. Use the given table and/or the histogram to answer the following questions:
a poll was conducted by making random phone calls to people in the united states. 3000 people called agreed to
in a small town the relationship between robberies and police officers on aduty has been collected. x represents the
What is the expected value of playing roulette if you bet $18 on red ?
Do these data provide sufficient evidence to indicate that the mean for the population is less than 8 hours? assume a normally distributed population.
Assuming that the relationship between year tt and cost cc is linear, develop a formula for predicting the average cost of a compact car in the future measuring the variable tt as years since 2000. Be sure to use the lower case variables tt and cc..
electrical engineers recognize that high neutral current in computer power system is a potential problem. a recent
Weights of newborn babies in the United States are normally distributed with a mean of 3425 grams and a standard deviation of 495 grams. A newborn weighing less than 2200 grams is considered to be at risk. What fraction of newborn babies are in th..
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