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Data on 4200 college graduates show that the mean time required to graduate with a? bachelor's degree is 5.15 years with a standard deviation of1.69 years. Use a single value to estimate the mean time required to graduate for all college graduates.? Also, find the? 95% confidence interval for the mean time required to graduate for all college graduates.
The mean time required to graduate for all college graduates is approximately ________years.
?(Round to the nearest hundredth as? needed.)
What is the estimated probability that a randomly sampled adult has a high income and is optimistic? Compute a .95 confidence interval for the true probability.
Using the 0.05 level of significance, is there evidence that the population mean is above $190? What is your answer in (a) if s = $50 and the 0.10 level of significance is used?
suppose the coach of the football team wants to estimate the proportion of the population of fans who support his
using the table of continuous data below how would i compute the 25th 50th and 75th percentiles?2512897456563474
using the standard normal table find the proportions for the areas listed belowa. the area between z 0 and z 2.13b.
What are the key outputs of a risk assessment process? What should be done with these outputs?
A researcher measures a response variable Y and explanatory variable X on each of several objects. A scatterplot of the measurements is as follows.
What is the correlation between student cumulative GPA and the numbers of hours spent on school work each week? Be sure to include the computations.
a local school district claims that the number of school days missed by its teachers due to illness is below the
A random sample of 160 car crashes are selected and categorized by age. The are listed below. The age distribution of for the given categories is 18% for under 26, 39% for 26-45, 31% for 46-65, and 12% for over 65.
Discuss briefly. Is eyewitness evidence unreliable? What's missing from the story?
How could we rescreen for defective units from a population of 900 units and establish a 95% confidence that the whole 900 units are acceptable.? How many would we need to check out of the 900?
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