Which of the following is not a characteristic of the normal probability distribution? Answer The graph of the curve is the shape of a rectangle The total area under the curve is always equal to 1. 99.72% of the time the random variable assumes a value within plus or minus three standard deviations of its mean The mean is equal to the median, which is also equal to the mode. Question 2 A manufacturer wants to estimate the proportion of defective items that are produced by a certain machine. A random sample of 50 items is taken. Which Excel function would not be appropriate to construct a confidence interval estimate? Answer (I feel this question is a bit ambiguous. The answer depends upon in what form data is given. I have chosen the best answer) NORMSINV COUNTIF STDEV All are appropriate. Question 3 The expected value of the random variable is Answer s the standard error the sample size the population mean Question 4 Ordinary arithmetic operations are meaningful Answer only with categorical data only with quantitative data either with quantitative or categorical data with rank data Question 5 It is known that the population variance equals 484. With a 0.95 probability, the sample size that needs to be taken to estimate the population mean if the desired margin of error is 5 or less is Answer 25 74 189 75 Question 6 In a sample of 800 students in a university, 160, or 20%, are Business majors. Based on the above information, the school’s paper reported that “20% of all the students at the university are Business majors.” This report is an example of Answer a sample a population statistical inference descriptive statistics Question 7 The control limits for an x-bar chart are how many standard deviations above and below the process mean? Answer one two three four
Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.
You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.Read more
Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.Read more
Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.Read more
Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.Read more
By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.Read more