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In team-teaching, two or more teachers lead a class. A researcher tested the use of team-teaching in mathematics education. Two of the variables measured on each teacher in a sample of 171 mathematics teachers were years of teaching experience x and reported success rate y (measured as a percentage) of team-teaching mathematics classes The correlation coefficient for the sample data was reported as r = -0.32. Interpret this result.
the following are the hours of operation to failure of 38 light bulbs.150 389 345 310 20 310 175 376 334 340 332 331
Identify a research question from your professional life, research interests, or everyday experience that could be addressed by this analysis.
Find the probability that 10 customers will arrive in a particular 15-minute period. Set up the mathematical model and use the table.
maria collected data on amount spend for entertainment each week on average. after constructing a histogram maria
If the rainfall was recorded on 27 (instead of 9) randomly selected days throughout the year, the standard error of the mean would be equal to?
a supplier of wire cables has determined that the strength of the cables has a normal distribution with mean ? 2000
Let the probability of a decreasing employment be 0.6 and the probability of a positive economic trend 0.5. Further, assume that the probability of a decreasing employment given a negative economic trend is 0.7.
A random sample of 121 checking accounts at bank showed an average daily balance of $280 the standard deviation of the population is known to be $6. Find the standard error of the mean.
Determine the probability in big class that both sections are covered? Only one section? Neither section? Determine the expected number of sections covered?
you have obtained a sub-sample of 1744 individuals from the current population survey cps and are interested in the
A South American custom candy producer wants to know if the mean daily consumption of regular sugar sweetened candy eaters is less than that of artificial sweetened candy eaters.
A statewide real estate company specializes in selling farm property in the state of Nebraska. Their records indicate that the mean selling time of farm property is 90 days.
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