The following are all 6 quiz scores of a student in a statistics course. Each quiz...
The ages (in years) of the 6 doctors at a local clinic are 37, 38, 53, 52, 43, 53 Assuming that these ages constitute an entire population, find the standard deviation of the population. Round your answer to two decimal places. (If necessary, consult a list of formulas.) X 5 ?
The 6 participants in a 200-meter dash had the following finishing times in seconds). 26, 24, 24, 32, 32, 30 Assuming that these times constitute an entire population, find the standard deviation of the population. Round your answer to two decimal places. (If necessary, consult a list of formulas.) 0 X 5 ?
The following data are the distances from the workplace in miles) for the 5 employees of a small business. 8.5.19.5.18 Assuming that these distances constitute an entire population, find the standard deviation of the population. Round your answer to two decimal places. (If necessary, consult a list of formulas.)
A student takes a 10 point quiz each week in statistics class. If the student's quiz scores for the first three weeks are 2, 6 and 10 then the mean score is M=9?
A statistics instructor measured student attitudes toward a statistics course prior to lectures, at the midterm, and after the final exam. Attitudes were measured on a 16-point scale, with higher scores indicating more positive attitudes toward the statistics course. Student Prior to Lectures At the Midterm After the Final A 6 5 11 B 4 10 15 C 8 12 13 D 12 11 16 E 5 7 10 Based on the results shown in the table, test whether or...
The final exam scores of students taking a statistics course are normally distributed with a population mean of 72 and a population standard deviation of 8. If a student taking this statistics course is randomly selected, what is the probability that his/her final exam score is between 60 and 84? A .4332 .9332 C .8664 .1336 Submit Answer
A true-false quiz with 10 questions was given to a statistics class. Following is the probability distribution for the score of a randomly chosen student. Find the mean score and interpret the result. Round the answers to two decimal places as needed. 5 6 7 9 10 P(x) 0.08 0.18 0.35 0.22 0.11 0.06 8 to Excel х The mean is If we were to give this quiz to more and more students, the mean score for these students would...
The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 419, 455, 479, 535, 540, 607 Find a 99% confidence interval for the population standard deviation. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places (If necessary, consult a list of formulas-) What is the...
The mean SAT score in mathematics, μ, is 551. The standard deviation of these scores is 33, A special preparation course claims that its graduates will score higher, on average, than the mean score 551. A random sample of 43 students completed the course, and their mean SAT score in mathematics was 556 Assume that the population is normally distributed. At the 0.05 level of significance, can we conclude that the preparation course does what it claims? Assume that the...
The following data represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. Complete parts (a) through (c) below. Traditional 70.8 68.8 79.4 66.9 85.9 77.1 55.6 80.6 81.5 70.9 64.0 69.6 59.5 Flipped 75.5 72.0 63.1 73.4 76.9 92.8 78.0 75.9 81.1 69.6 91.8 78.9 75.9 (a) Which course has more dispersion in exam scores using the range as the measure of dispersion? The traditional course has a range of...