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Suppose that there are two machines available for cutting corks. The machine described in the preceding problem produces corks with diameters that are approximately normally distributed with mean 3 cm and standard deviation 0.1 cm. The second machine produces corks with diameters that are approximately normally distributed with mean 3.05 cm and standard deviation 0.01 cm. Which machine would you recommend? (Hint: Which machine would produce fewer defective corks?)
for each of the following statements give the null hypothesis ho and the alternate hypothesis h1.1. the mean
Sketch a curve, point out the distribution (i.e., normal , student T, Chi square), critical region(s). test statistics, critical values(s) and n p-value?
the total evaporation amount of a growing season in minneapolis is approximately normally distributed with a standard
what is the percentage of the total area under the normal curve within plus and minus 1.6 standard deviations of the
estimating the percentage of youngsters between 16-0 driving
A random sample of 100 peaches is gathered and the mean diameter is calculated. What is the probability that the sample mean is greater than 3.79 inches.
question if the regression line is drawn as y c 1075x when x was 2 and y was 239 given that the intercept was 11.
John conducted his study to measure self-esteem among victims of domestic violence before and after they complete an 8-week program for abuse victims with 10 individuals.
the true mean breaking strength of yarn used in manufacturing drapery material is required to be above 100 psi. from
the director of broadcasting for a cable company took a sample of 522 people. testing was to determine the popularity
At the 0.05 level of significance, can we conclude Middletown students remained in their districts less time than Brockton students? Make use of 5-step hypothesis testing procedure.
the mean and standard deviation on a calculus mid term are 66 and 19 points while they are 72 and 15 on the final. if a
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