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The mean for the verbal component of the SAT is reported as 500, with a standard deviation (σ) of 100. A sample of 400 students throughout a particular school district reveals a mean score of 498. Estimate the mean score for all the students in the district, using a 95% confidence interval?
in an integrative research review of an intervention s effectiveness which statement is true of an inclusion statement
a) For each of the six feeds, compute 95% confidence intervals for the mean weight of chickens fed that feed.
Locate value of the population mean in your sketch and make an estimate of the standard deviation
He made this decision based on a test using α = 0.05. Would he have made the same decision at α = 0.01? How about α = 0.01? Explain.
the probability that a person in the united states has type o blood is 38. three unrelated americans are selected at
What control chart(s) would you use for this data and what are the final control limits?
Find the minimum sample size needed, using a prior study that found that 42% of the respondents said they think their president can control the price of gasoline.c) Compare the results from parts (a) and (b).
For a simple random sample of ten patients who have recently had knee surgery, the scores are as follows: 101, 92, 94, 88, 52, 93, 76, 84, 72, and 98. Construct and interpret the 90% and 95% confidence intervals for the population mean.
a random sample of 70 voters found that 40 were going to vote for a certain candidate. find the 99 limit for the
the hourly wages in a particular industry are approximately normally distributed with mean 15.00 and a standard
Show some work for each part. A diagram can be helpful. A survey of adults found the following: 65 percent of the adults drink coffee. 35 percent drink tea. 80 percent drink coffee or tea (or both). If we choose a surveyed adult at random, find t..
The correlation between IQ and the verbal SAT score among the seniors at GWB High School is .90; it is significant. The mean IQ is 100 with a standard deviation of 10.
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