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According to a recent report, a worker in the IT industry spends, on average, 419 minutes daily on the job. Suppose the standard deviation of time spent on the job is 27 minutes. If the distribution of time spent on the job is approximately bell-shaped, between what two times would 68% of data fall? Suppose a worker spends 400 minutes on the job. What is that worker's z-score? Comment on the result.
Consider a normal distribution curve where the middle 70 % of the area under the curve lies above the interval ( 1 , 11 ).
Assume that the two populations of appreciation rates are normally distributed and that the population variances are equal. Can we conclude, at the level of significance, that houses in Sun Beach have higher appreciation over the past three years..
If both parents are Cc, what is the probability that an offspring will be white? probability as a fraction.
let x bar 10000 be the fraction of heads in 10000 tosses. use chebyshevs inequality to bound pxbarn - 12 is greater
Galvanizing lines that are assumed to operate independently. What is the probability that none of the lines experiences a surface finish problem in 40 hours of operation.
For each of the following intervals, give the interval width, the real limits, the apparent limits of the next higher interval, and the real limits of the next
Body fat, again. Use the data from Question 2 to examine the association between Weight and % Body Fat. Interpret your interval in context
Use the given confidence level and sample data to find a confidence interval for estimating the population mean
The thickness of photoresist applied to wafers in semiconductor manufacturing at a particular location on the wafer is uniformly distributed between 0.2050 and 0.2150 micrometers.
If 20 customers were selected at random during one business day, what is the probability that at least 11 of them did not order a pastry with their drink. Round answer to 4 decimal places.
In Exercises 2- 4, the random variable x is normally distributed with mean µ=18 and standard deviation s=7.6.
If an interactive poll found that 379 of 2,246 adults aged 18 or older have at least one tattoo. How would I determine the following solutions?
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