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The distribution of the monthly cost does not follow the normal distribution. In fact, it is positively skewed. What is the probability of selecting a sample of 50 one-bedroom apartment and finding
A local authority installs 2000 electric lamps. The life of lamps in hours (X) follows a normal distribution, where X~N(1000,200). What number of lamps might be expected to fail within the first 700
A sample of 50 employees from the list indicates that there are 40 full-time employees, 6 part-time employees, and 4 furloughed/laid -off employees. Conduct a statistical test to determine whether t
Suppose that the average blackness of today's sample of 25 spots is 0.952. What conclusion would you draw about the blackness of the newspaper based on this result ? Explain.
I calculated the probability of 0.3125. I hope that is correct but I am having a hard time with undersatnding what percentile that falls in?? What is the probability if the mean glucose level exceed
The distribution of IQ scores is normal with µ = 100 and ? = 15. What proportion of the population has IQ scores greater than 130? Please provide a detailed response.
The distribution of IQ scores is normal with µ = 100 and ? = 15. What proportion of the population has IQ scores greater than 115?
The distribution of IQ scores is normal with µ = 100 and ? = 15. What proportion of the population has IQ scores greater than 145? Please provide a detailed response.
A box contains 10 items, of which 3 are defective and 7 are non-defective. Two items are randomly selected, one at a time, with replacement, and x is the number of defectives in the sample of two.
For a normal distribution, find the z-score values that separate the middle 70% of the distribution from the 30% in the tails. Please provide a detailed response.
For a normal distribution, identify the z-score location that would separate the distribution into two sections so that there is 80% in the body on the right-hand side.
Find the actual percentages of observations within one, two , and three standard deviations of the mean?
For a normal distribution, identify the z-score location that would separate the distribution into two sections so that there is 70% in the body on the right-hand side.
A kindergarten class consists of 14 boys and 11 girls. If the teacher selects children from the class using random sampling, what is the probability that the first child selected will be a girl?
A distribution with a mean of µ = 38 and a standard deviation of s = 20 is being transformed into a standardized distribution with µ = 50 and s = 10. Find the new, standardized score for
I calculated the probability of 0.3125. I hope that is correct but I am having a hard time with undersatnding what percentile that falls in? What is the probability if the mean glucose level exceeds
The distribution of IQ scores is normal with µ = 100 and σ = 15. What proportion of the population has IQ scores greater than 145? Please provide a detailed response.
For a normal distribution, find the z-score values that separate the middle 70% of the distribution from the 30% in the tails.
For a normal distribution, find the z-score values that separate the middle 60% of the distribution from the 40% in the tails.