Q1: According to the following table, which describe the grade distribution of students. Find the mean,...

Q1: According to the following table, which describe the grade distribution of students. Find the mean, median class, median, modal class and mode for this distribution.

1-Mean.

2-Median Class.

3-Median.

4-Modal Class.

5-Mode.

Frequency	Grade
2	51 - 55
7	56 - 60
8	61 - 65
4	66 - 70

Expert Solution

Hope this resolves your doubt.

Please give an upvote if you liked my solution. Thank you :)

venereology answered 8 months ago

Grade point averages of students on a large campus follow a normal distribution with a mean...

Grade point averages of students on a large campus follow a normal distribution with a mean of 2.6 and a standard deviation of 0.5. d) A random sample of 400 students is chosen from this campus. what is the probability that at least 80 of these students have grade point averages higher than 3.0? e) Two students are chosen at random from this campus. what is the probability that at least one of them has a grade point average higher...

Find the mean, median, and mode for the scores in the following frequency distribution table: X...

Find the mean, median, and mode for the scores in the following frequency distribution table: X f 5 2 4 5 3 2 2 3 1 0 0 2 The mean (to two decimal places) is , the median is , and the mode is . Based on the three values for central tendency, what is the most likely shape for this distribution of scores? The distribution is because the mean is the median and the median is the mode.

The distribution of the heights of the first grade students is mound – shaped and symmetric...

The distribution of the heights of the first grade students is mound – shaped and symmetric with the mean height of 140 cm and standard deviation of 5 cm. According Empirical rule What % of heights is between 125 and 155 cm What % of heights is between 135 and 150 cm What % of heights is less than 130 cm What % of heights is less than 130 cm

The grade of statistics follows a normal distribution with a mean of 85 and a standard...

The grade of statistics follows a normal distribution with a mean of 85 and a standard deviation of 10. The instructor adopted a new teaching method this year, and would like to investigate whether there is an improvement in students’ average grade. Suppose the average grade from a sample of 36 students is 88, can we conclude that there is an improvement at the 5% significance level? A. Specify the null and alternative hypotheses. B. Determine the rejection region. C....

QUESTION 3 The following table contains ACT scores and the GPA for eight college students. Grade...

QUESTION 3 The following table contains ACT scores and the GPA for eight college students. Grade point average is based on a four-point scale and has been rounded to one digit after the decimal. Student GPA ACT 1 2.8 21 2 3.4 24 3 3 26 4 3.5 27 5 3.6 29 6 3 25 7 2.7 25 8 3.7 30 You estimate the following relationship between GPA and ACT: SUMMARY OUTPUT Regression Statistics Multiple R 0.759884064 R Square 0.577423791...

Consider the following frequency table representing the distribution of hours students study for an exam in...

Consider the following frequency table representing the distribution of hours students study for an exam in a week. Hours Students Study for an Exam in a Week Class Frequency 17–27 13 28–38 15 39–49 11 50–60 15 61–71 2 Step 1 of 2: Determine the cumulative frequency for the fifth class. Step 2 of 2: Determine the cumulative frequency for the second class.

Grade distribution: A statistics teacher claims that, on the average, 10% of her students get a...

Grade distribution: A statistics teacher claims that, on the average, 10% of her students get a grade of A, 24% get a B, 38% get a C, 18% get a D, and 10% get an F. The grades of a random sample of 100 students were recorded. The following table presents the results. A. Compute the expected frequencies B. List all of the grades which were given more often than expected separate by commas. The grades which were given more...

The scores of fourth grade students on a mathematics achievement test follow a normal distribution with...

The scores of fourth grade students on a mathematics achievement test follow a normal distribution with a mean of 75 and standard deviation of 4. What is the probability that a single student randomly chosen form all those taking the test scores 80 or higher? What is the probability that the sample mean score of 64 randomly selected student is 80 or higher?

The following table shows the average mathematics and science achievement test scores of eighth-grade students from...

The following table shows the average mathematics and science achievement test scores of eighth-grade students from 12 countries around the world.. Math x Science, y 525 540 558 535 511 518 531 533 392 420 585 569 476 450 496 538 520 535 582 530 532 552 502 515 (a) Draw a scatter plot using one the following website(s): http://www.alcula.com/calculators/statistics/scatter-plot/ or https://www.meta-chart.com/scatter (b) Estimate the correlation in words (positive, negative, or no correlation) (c) Calculate the correlation coefficient, r. (d)...

The TEST grade of a statistics class has a skewed distribution with mean of 79 and...

The TEST grade of a statistics class has a skewed distribution with mean of 79 and standard deviation of 8.2. If a random sample of 35 students selected from this class, then what is the probability that average TEST grade of this sample is between 76 and 82? Answer: (round to 4 decimal places) The average amount of water in randomly selected 16-ounce bottles of water is 15.87 ounces with a standard deviation of 0.55 ounces. If a random sample...

Question