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Determine the standard score for the value x=452 realative to its sample, where the sample mean is 500 and the standard deviation is 32. Then find the value of x that corresponds to the standard score of 1.2, where the mean is 135 and the standard deviation is 15.
The following data show the cost of electricity during August 2010 for a random sample of 50 one-bedroom apartments in a large city:
ABC Manufacturing has six machines that perform particular task. Breakdowns happens frequently for this machine. Past records indicate that the number of breakdowns that happen each day is described by the probability distribution seen below:
Using α = .05 test for significance differences among the population mean wasted time for theses three urban areas. What is the p-value? What is your conclusion?
Estimate and interpret the p-value of the calculated test statistic.
Category of decision rule which contains maximax decision rule is?
Chi-square test for goodness of fit - difference in the use of the four entrances?
Formulate the hypotheses that can be used to determine whether union membership increased in 2006.
Suppose a certain brand of Westinghouse light bulbs has a population life expectancy of 3000 and a population standard deviation equal to 100. (Assume the distribution of the population is normal). What is the probability that a sample of 30 light..
CCI is unable to adjust the mean of the filling process. However, it is able to adjust the standard deviation of the filling process.
What is the smallest number of consumers that Timex can survey to guarantee a margin of error of .05 or less at a 99% confidence level and calculate the intervals correctly
With the test statistic you chose, work out the problem with solution using .05 level of significance if it applies.
To find z-score and required probabilities based on Normal distribution. Assume that childrens weekly allowances are normally distributed in the population.
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