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The ages of workers in Illuminex plant are around normally distributed with the mean of 47 years and standard deviation of 12 years. Worker is stopped at random and asked to fill out questionnaire. Determine the probability that this worker is less than 30 old?
Your friend tells you that the proportion of active Major League Baseball players who have a batting average greater than .300 is greater than 0.56, a claim you would like to test. The hypotheses for this test are Null Hypothesis: p ≤ 0.56, Altern..
The hospital tests five vials from each shipment. If at least one of the five is ineffective, find the conditional probability pf that shipment's having come from C.
A random sample of eight adults aged 30 years were asked how much they spent on medical costs in the year 2011. The following data were measured. Compute the sample standard deviation.
Calculated test statistic, decision about the null hypothesis interpretation of results, and a list of references consulted.
State the null and alternate hypotheses if you want to determine whether the mean amount spent is higher for men than for women,
Fix-It Copiers advertises mean time of 100 minutes for office calls with standard deviation of 25 minutes. What percentages of calls are completed?
A professor is targeting a score of 80 on an exam. His forty-nine students averaged 78 on an exam with s = 7. Are the scores significantly less than 80 at a significance level of 0.05? Show your work and state the conclusion.
Based on this data can the college conclude that the students in the new program performed better than the rest of the class> A one-tailed test is used equalling .05
What do the coefficients of the regression line tell you about the relationship between mortgage rates and housing starts?
The personnel manager at a company wants to investigate job satisfaction among the female employees. One evening after a meeting, she talks to all 30 female employees who attended the meeting.
Can you conclude that information in article is untrue? Use 0.05 significance level. Find out p-value and explain its meaning.
Find the probability that he will answer all 10 questions correctly.
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