If the average grade on an exam was 75% and the standard deviation was 4%, what would the three lower limitintervals be for the given normal curve by the empirical rule?O 75, 71, and 67O None of the answers listedO 67, 63, and 59O 71, 67, and 63pe here to search8F SunnyルEDGレBAltAlLCtrt

The mean is 75% and the standard deviation is 4%.

Answered: If the average grade on an exam was 75%…

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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A scale is known to be "low-calibrated" in that it measures an aluminum bar to be 4 grams lower than the actual weight. If ????μold is the mean of all possible measurements of the bar using the old calibration, and ????μnew is the mean of all possible measurements of the bar using a re-calibrated scale. It is desired that ????−????=4μnew−μold=4. Consider the test ?0:????−????=4H0:μnew−μold=4 vs. ?0:????−????≠4H0:μnew−μold≠4 Sample after calibration: mean is 95.8 , SD is 4.9 and sample size is 10 Sample before calibration: mean is 89.352 , SD is 4.2 and sample size is 62 We do not know population standard deviations. What is the p-value? (Hint: best to use software, or else the Desmos Calculator for the 2 sample T and Z test)
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Q.9. Calculate missing frequencies from the following when mean is 13-75. No. of students : 4 8 10 12 18 24 22 frequency : 13 11 9 8 10
Which of the following statements is not true? There is only one median for each variable. One definition of the median states that, for an odd number of observations, the median is the middle score when scores are placed in order of magnitude. Another term for the median is 50th percentile. The median is generally more sensitive to (i.e., affected by) the presence of a few extreme observations than is the mean.
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87 582 B/s l? 4. Suppose that only 10 students in had taken the Nabatieh campus midterm. Which of the following could be an example of their test scores? Justify by finding their median. а. 97,96,94,90,80,82,68,66,64,62 b. 78,75,78,80,79,81,86,85,88,80
Which of the following statements is correct? A. sigma is the average distance between an individual in a population and the population mean. B. s is the average distance between an individual in a sample and the population mean. C. sigma/√n(or sigma √n if sigma is unknown) is the average distance between a sample mean of size n and the population mean. D. Both A and C.
Choose the letter of the correct answer. 1. Which of the following is always true? A. standard deviation can be less than 0 B. mean can be used for qualitative data C. coefficient of variation is an absolute dispersion D. standard deviation is always positive 2. The following statements indicate the use of inferential statistics EXCEPT A. A manufacturer of light bulbs claims that their light bulbs last for 10,000 hours. B. The yearly expenditures on food for 15 families are estimated to be P200,000. C. A recent study showed that eating garlic can lower blood pressure. D. A survey says that 1 out of 50 males is a member of a fitness center. 3. The "time consumed on Facebook on a particular day" is what type of variable? A. qualitative B. discrete quantitative C. continuous quantitative D. cannot be determined
.Find the standard deviation of -2, 7.2, 6.9, -10.4, 5.3 6 .a O 6.9 .b 7.CO 6.78 .do
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31. A class of 20 students took a test. The standard deviation of the test scores is 0. Which of the following statements must be true about the test scores? A. All of the test scores are zero. B. All of the test scores are positive. C. Half of the test scores are positive and half of the test scores are negative. D. All of the test scores are the same.

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If the average grade on an exam was 75% and the standard deviation was 4%, what would the three lower limit intervals be for the given normal curve by the empirical rule? O 75, 71, and 67 O None of the answers listed O 67, 63, and 59 O 71, 67, and 63