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Exam Scores An exam has a mean of 70 and a standard deviation of 10. What exam score corresponds to a z-score of 1.5?
The lifetime of a light bulb is an Exponential RV with a mean of 800 hours. Let L represent the time (in hours) that one randomly selected light bulb will burn. What is the possibility the light bulb burns for more than 1000 hours.
the standard deviation is $400. Suppose 90 claims are filed in one week. What is the probability that the average (sample mean) is more than $1900?
Human body temps are normally distributed with a mean of 98.2 and standard deviation of 0.62. Find the temp that separates the top
In the United States, sudden infant death syndrome (SIDS) is one of the leading causes of postneonatal deaths (those occurring between the ages of 28 days and 1 year).
Find the mean-squared distortion, d. - Find the signal-to-quantization-noise ratio in dB. - Find the conditional mean and the conditional variance given that X > 1 .
1. the company believes that it averages about the same weight per bag in each of two production lines. to test this
Average size of ready-made garments. (ii) Average marks of a student and when median is greater than mean, and (ii) When Mean is greater than median.
Indication, If two customers are served together, then they will leave the system at the same time. Moreover, if there are two customers in the system, then one of the servers may be free.
Interpret the regression coef?cient. Are subjects in the U.S. more willing to pay extra for non-biotech breakfast cereals than U.K. subjects, or are they less willing?
When calculating all the values of a binomial distribution, the work can usually be simplified by first calculating b(0; n, θ ) and then using the recursion formula
While the 46 afternoon students' average score was 79.44 with a standard deviation of 6.62. (a) Which test would you use to compare the means?
We assign 12 students randomly to each of the four possible cells in the design and obtain a score for each subject on the same 50 point test at the end of the semester.
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