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Use an appropriate confidence interval in reaching a conclusion regarding the problem situation and null hypothesis for given Exercise.
Exercise A manufacturer of electronic kits has found that the mean time required for novices to assemble its new circuit tester is 3 hours, with a standard deviation of 0.20 hours. A consultant has developed a new instructional booklet intended to reduce the time an inexperienced kit builder will need to assemble the device. In a test of the effectiveness of the new booklet, 15 novices require a mean of 2.90 hours to complete the job.
Assuming the population of times is normally distributed, and using the 0.05 level of significance, should we conclude that the new booklet is effective? Determine and interpret the p-value for the test.
Suppose the age of buyers were collected and the data follows the bell curve (a normal distribution). The buyers had an average age of 47 years and a standard deviation of 5.
Each entry in a table of random digits like Table B has probability 0.1 of being a 0, and digits are independent of each other. What is the probability that a group of ?ve digits from the table will contain at least one 5?
explain the concept and application of uniform
1.some researchers have conjectured that stem-pitting disease in peach tree seedlings might be controlled with weed and
The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.
What is true about the two values
in a poll respondents were asked if they have traveled to europe. 68 respondents indicated that they have traveled to
question which is relatively better a score of 85 on a psychology test or a score of 45 on an economics test? scores on
what is the taguchi constant for a device that costs 400 to repair and a tolerance of plus or minus 0.5 mm with a mean
among women who have the bcrs12 gene 51 of them contract breast or ovarian cancer by the age of 50. imagine an
Would the results of this survey be considered a random sample - what type of bias might be associated with a data collection system such as this?
In these programs, red light cameras installed at dangerous intersections photograph the license plates of vehicles that run the red light. How effective are photo-red enforcement programs in reducing red light-running crash incidents at intersect..
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