The graph illustrates the distribution of test scores taken by College Algebra students. Themaximum possible score on the test was 130, while the mean score was 80 and the standarddeviation was 12.4456688092104116Distribution of Test ScoresUsing the Empirical Rule,What is the approximate percentage of students who scored lower than 44 on the test?Type here to search What is the approximate percentage of students who scored lower than 44 on the test?%What is the approximate percentage of students who scored higher than 104 on the test?%What is the approximate percentage students who scored between 68 and 92 on the test?%What is the approximate percentage of students who scored between 80 and 116 on the test?Question Help: DVideo 1 DVideo 2Check AnswerType here to search

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What is the approximate percentage of students who scored lower than 44 on the test? What is the approximate percentage of students who scored higher than 104 on the test? % What is the approximate percentage students who scored between 68 and 92 on the test? %

What is the approximate percentage of students who scored lower than 44 on the test? What is the approximate percentage of students who scored higher than 104 on the test? % What is the approximate percentage students who scored between 68 and 92 on the test? %

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 130, while the mean score was 73 and the standard deviation was 14.3145597387101115Distribution of Test Scores What is the approximate percentage of students who scored between 59 and 73?%What is the approximate percentage of students who scored between 73 and 115 on the test?%What is the approximate percentage of students who scored between 45 and 101 on the test?%What is the approximate percentage students who scored between 59 and 87 on the test?%
The graph illustrates the distribution of test scores taken by College Algebra students. The maximum possible score on the test was 120, while the mean score was 72 and the standard deviation was 11. 395061728394105Distribution of Test Scores Use the "Empirical Rule", not a calculator or other technology. Do not round your answers. What is the approximate percentage of students who scored between 50 and 94 on the test?%What is the approximate percentage of students who scored between 61 and 72?%What is the approximate percentage students who scored between 61 and 83 on the test?%What is the approximate percentage of students who scored higher than 94 on the test?
The researcher took a random sample of 50 residents and found that the mean height of men is 175cm. Suppose that the team is made aware of the fact that the distribution of heights is distributed normally. 1, The sample median is an unbiased estimate of the mean height of men. Is the following statement about the estimator true? 2, Determine whether or not the median or mean is an efficient estimator of the population median.
A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful only if the average time spent on a delivery does not exceed 38 minutes. The owner has randomly selected 19 customers and delivered pizzas to their homes in order to test whether the mean delivery time actually exceeds 38 minutes. Suppose the p-value for the test was found to be 0.0 276. State the correct conclusion.
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 36 and a standard deviation of about ten. Suppose that 16 individuals are randomly chosen. Let X = average percent of fat calories. a. X ~ ______(______, ______) b. For the group of 16, find the probability that the average percent of fat calories consumed is more than five. Graph the situation and shade in the area to be determined. c. Find the first quartile for the average percent of fat calories.
The weights of discarded plastic from a sample of 62 households have a mean weight of 1.911 lbs. The standard deviation of the sample is 1.065 lbs. Use a 0.05 significance level to test the claim that the mean weight of the discarded plastic form the population of households is greater than 1.800 lbs. (List all the steps and show your work).
The cost of textbooks relative to other expenses has risen greatly over thepast few years, and university officials have started to include the average amount expended on textbook in the estimated yearly expenses for students.In order for these estimates to be useful, they should be within $25 of the mean expenditure for all undergraduate students at the university. How many students should the university sample in order to build 95% confident that its estimated cost of the textbooks will satisfy the stated level of accuracy ?From the data collected in previous year the university officials have determined the annual expenditure for textbooks has normal distribution with cost ranging from $250 to $750.
A local eat-in pizza restaurant wants to investigate the possibility of starting to deliver pizzas. The owner of the store has determined that home delivery will be successful only if the average time spent on a delivery does not exceed 34 minutes. The owner has randomly selected 15 customers and delivered pizzas to their homes in order to test whether the mean delivery time actually exceeds 34 minutes. Suppose the p-value for the test was found to be .0280. State the correct conclusion. At α = .05, we fail to reject H0. At α = .03, we fail to reject H0. At α = .025, we fail to reject H0. At α = .02, we reject H0.
How likely it is that a mean from a particular sample is representative of the population is defined as: t-score F-statistic z-score p-value
A company has a new process for manufacturing large artiﬁcial sapphires. In a trial run, 37 sapphires are randomly selected. The mean weight for these gems is ?¯=6.75x¯=6.75 carats, and the sample standard deviation is ?=0.33s=0.33 carat. Let ? be the mean weight for the distribution of all sapphiresproduced by the new process. (Show your work) What is the degrees of freedom in this problem? Use table or Technology to find t-critical value with degrees of freedom found above and with ?=0.05α=0.05 significance level. Find the Margin of error (E) Find a 95% confidence interval for ? Interpret the conﬁdence interval in the context of the problem.
Use the central limit theorem to find the mean and standard error of the mean of the indicated sampling distribution. Then sketch a graph of the sampling distribution. The per capita consumption of red meat by people in a country in a recent year was normally distributed, with a mean of 106 pounds and a standard deviation of 38.6 pounds. Random samples of size 17 are drawn from this population and the mean of each sample is determined. Ux = Standard deviation =
The student test scores for a nationwide standardized test have an unknown distribution with mean 259 and standard deviation 38 points. A sample, with size n=55, was randomly drawn from the population. Using the Central Limit Theorem for Means, what is the mean for the sample mean distribution? Provide only the number with no units.