c) What is the meaning of the standard deviation in relation to the data?(A1)d) Describe how the standard deviation calculated above relates to the normal distribution curve below. (A 1)Data Management 12, MHR, 2014, p. 3493-2 21 0 +1 +2 +368%-95%99,7% Height, x(cm)166163168161165166166Total Ex=Ex¹ =a) Find the mean height of the students.Deviation,(x-x)Deviation Squared(K 1)

The given data indicates the heights of students. Mean is the average of the data. It is the sum of…

Answered: c) What is the meaning of the standard…

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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Q3/ The following data represent the lifetimes of light bulbs (in months), frequency distribution was obtained; Find the mean, variance and standard deviation. Class limits frequency 10-20 21-31 10 32-42 3 43-53 54-64 18 65-75
4. The cost of a daily newspaper varies from city to city. However, the variation among prices remains steady with a standard deviation of 18c. A study was done to test the claim that the mean cost of a daily newspaper is $1.00. Twelve costs yield a mean cost of 93¢ with a standard deviation of 17¢. Do the data support the claim at the 1% level?
Scenario: The mean score for all high school seniors taking a college entrance exam is 500. Advocates for a charter school boast that their program helps to increase student exam scores. For a random sample of 100 students from the charter school, the mean exam score is 516 with a standard deviation of 90. Test the school's claim that their program improves student test scores. Question: Is the charter school correct in their claim? In a short paragraph, formulate the correct conclusions for this test given the results above. In your answer, make sure to address both the null and alternative hypotheses, as well as the charter school's claim.
b) Rachel received the following scores on the midterm and final examinations in his introductory psychology course. The mean and the standard deviation for each test are given below. Assume that the normal distribution provides a good model for the frequency distribution. Section 8. 40 90 |Midterm 50 Final 100 12 i. What percentage of students scored better than Rachel on the midterm? The department has decided that all marks from introductory psychology courses should be reported based on a standardized distribution with a mean of 100 and standard deviation of 15. What would be Rachel's final examination scores based on ii. this new distribution?
9. Determines the average, median and standard deviation of each of the distributions to a variable (age, girl reaction time and boys reaction time).What interpretations can you make of it? B.) For each of the three two-variable distributions, make a graphical representation using a technological tool and calculate the values that can be used to interpret them. C.) Interpret graphic representations and draw conclusions.
Maxwell’s hot chocolate is concerned about the effect of the year-long coffee advertising campaign on the chocolate sales. The weekly hot chocolate sales from 15 locations (in this year) is collected and summarized in the following table. Descriptive Statistics N Sum Range Minimum Maximum Mean Std. Deviation Variance Sales 15 --- --- 20 197 24.80 3.53 12.46a) Calculate the missing values in the table (Sum and Range)b) The average sales was $26.6 last year and the manager of the firm claim that there is a decrease in the sales this year. Does the data provide sufficient evidence to support the claim of the manager at 1% significance level? Show your calculations in detail and interpret the result.
Q6/ Calculate mean, variance and standard deviation of following table: classes frequency 1-10 11 10-20 29 20-30 18 30-40 4 40-50 50-60 3
7. Female Pulse Rates Pulse rates of adult females are listed in Data Set 1 “Body Data” in Appendix B. The lowest pulse rate is 36 beats per minute, the mean of the listed pulse rates is x = 74.0 beats per minute, and their standard deviation is s = 12.5 beats per minute. a. What is the difference between the pulse rate of 36 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 36 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between - 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 36 beats per minute significant?
• Compute for the range, the mean deviation, and the standard of each set of grouped data. Scores of Contestants in a Math Competition Scores Frequency 46 - 50 16 41 - 45 21 36 – 40 15 31 - 35 10 26 – 30 17 21 - 25 16 - 20 1
Premature-birth Risk Found Higher for Teens (reported in the Sacramento Bee, April 27, 1995, p. A7) The youngest girls [in the study], those aged 13 to 17, were 90 percent more likely than the women in their early 20's to deliver prematurely. "The relative risk was 1.9. But what is the absolute risk for women in their 20's which is used as the baseline?
Consider the following sample data. Sample A: 11, 22, 33 Sample B: 81, 92, 103 Sample C: 1,100; 1,111; 1,122 (a) Find the mean and standard deviation for each sample. Sample A: Sample B: Sample C: Mean Sample Standard Deviation (b) What does this exercise show about the standard deviation? multiple choice The idea is to illustrate that the standard deviation is not a function of the value of the mean. The idea is to illustrate that the standard deviation is a function of the value of the mean.
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c) What is the meaning of the standard deviation in relation to the data? (A 1) d) Describe how the standard deviation calculated above relates to the normal distribution curve below. (A 1) Data Management 12, MHR, 2014, p. 349 -2-10 +1 +2 +3 68% -95%- 99,7%