474755032-hw7-central+limit+thm

2.A politician is interested in the proportion of voters in his district that think he is doing a good job.Define the following in terms of the study. Give examples where appropriate.PopulationSampleParameterStatisticVariableData

A class of undergraduate mechanical engineering students was surveyed. Respondents were asked about their political alignment. Of the 340 students who answered that question, 45 declared being conservative, 126 aligned with liberal ideology and 169 saw themselves as moderate. i) Give a frequency table for these data on political alignment. ii) Show how to obtain the corresponding relative frequency distribution and write a short sentence describing it. iii) How many modes do you see? What might explain this?  iv)  Is the shape symmetric, skewed right or left? What might explain this? Finally, in that same survey, respondents were asked to pick a random number from 1 to 9. v) What type of shape do you expect to see for a histogram displaying their answers and why?

At Quickie Car Wash, the wash process is advertised to take less than 7 minutes. Consequently, management has set a target average of 400 seconds for the wash process. Suppose the average range for a sample of 9 cars is 12 seconds. Use the accompanying table to establish control limits for sample means and ranges for the car wash process.

1) Prepare a dot plot to present the following temperatures recorded in degrees Fahrenheit, for three weeks in the town of Cidra: 78, 81, 83, 88, 82, 83, 78, 78, 80, 82, 79, 77, 77, 77, 83, 81, 77, 80, 80, 83, 78, 91, 83, 100, 70, 86, 84, 75, 77.

classify as either observational or experimental designCase 1: Starting Salaries. The National Association of Colleges and Employers (NACE) compiles information on salary offers to new college graduates and publishes the results in Salary Survey.

mycourses.rcsj.edu/webapps/assessment/take/launch.jsp?course_assessment_id=_986- ch Remaining Time: 1 hour, 06 minutes, 32 seconds. Question Completion Status: QUESTION 19 Provide an appropriate answer. Use the following frequency distribution to determine the Class Frequency 14-20 5 21-27 28-34 35-41 42-48 49-55 9 89 6 7 10 O14-20 O 35-41 O42-48; 49-55 O42-48 QUESTION 20 class (or classes). DELL Click Save and Submit to save and submit. Click Save All Answers to save all answers. M a

Central limit theorem works because if the sample size is sufficiently large, then the theory assumes the majority of the observations from the sample will be: 1) small observations  2) middle observations  3) large observations  4) cannot be determined

2. The lower boundaries for the number of tatoos among prison inmates are 1, 4, 7, 10, 13, and 16. List the value for each upper boundary in this distribution.

Please, I want a correct and clear solution to all paragraphs

Q8) A manufacturer produces machine parts, and the diameter of the parts is monitored using an X-bar and R chart. The specification limits for the diameter are 55 and 45. A total of 20 samples, each consisting of 3 parts, were measured. The data for the sample averages (X-bar) and ranges (R) for the 20 samples are given below: Sample No. X-bar (mm) R (mm) 1 52 4 2 51 3 3 49 2 4 48 4 15 53 5 16 50 3 7 52 3 18 47 4 19 51 3 10 52 14 11 49 2 12 48 3 13 51 3 14 50 4 15 52 3 16 49 17 50 4 18 50 14 19 48 3 20 50 a) Calculate the overall average X-bar and average range (R bar)? (1 mark) b) Determine the trial control limits for the X-bar and R chart? (1 mark) c) Is the process out of control? Determine the mean and standard deviation of the above process? (1 mark) d) Assuming the diameter to be normally distributed, what proportion of product will not meet the specifications? (2 marks) e) Assume that the process mean shifts to 52 mm. Calculate the process fallout considering this mean shift?…

7. Did plant height of the Alpine ecotype of cinquefoil vary between gardens? Provide justification for your answer including appropriate screenshots of text output and figures from R. The height of the Alpine ecotype cinquefoil does vary. Week 1 Assignment: Characterizing Populations > Ichistan; uchstan # Stanford garden [1] 25.78633 [1] 31.30598 Ich math; ucmath # Mather garden [1] 41.35308 [1] 48.65359 >chtimb; ultimb # Timberline garden [1] 23.81529 [1] 29.17042 Environment History Connections Tutorial Import Dataset ▾ 61 MiB List▾ Global Environment n.stan n. timb s.math 26L 28L 9.61125358120879 s.stan 6.70010332870954 s.timb 6.78079688157715 $1 17.3924278891305 $2 6 $3 97 54 $5 30.15 53 uc1.math uc1.stan ucl. timb x y1 y2 уз Functions 48.6535875829896 31.3059780687354 29.170424087752 ... num [1:141] 20 20.2 20.5 20.8 21 num [1:141] 1.98e-10 6.70e-10 2.19e... num [1:141] 1.86e-45 1.40e-44 1.04e... num [1:141] 8.29e-07 2.19e-06 5.55e... Height in cm 10 20 30 40 50 60 60 Mather…

What is the five-number summary for {12.5, 11.2, 10.9, 13.6, 19.9, 9.2, 2.7}?     Group of answer choices   A). Minimum Value = 12.5Q1 = 11.2Median = 13.6Q3 = 9.2Maximum Value = 2.7   B). Minimum Value = 2.7Q1 = 10.9Median = 13.6Q3 = 9.2Maximum Value = 19.9     C). Minimum Value = 2.7 Q1 = 9.2Median = 11.2Q3 = 13.6Maximum Value = 19.9     D). Minimum Value = 9.2Q1 = 13.6Median = 9.2Q3 = 19.9Maximum Value = 13.6

1) Convert the continuous data into discrete classes on iris dataset. Prepare the dataset by performing the preprocessing tedaniques, to have the data which improve model performance. Sepal.Length Sepal.Width Petal.Length Petal.Width Species 5.1 3.5 1.4 0.2 setosa 4.9 3. 1.4 0.2 setosa 4.7 3.2 1.3 0.2 setosa 4.6 3.1 1.5 0.2 setosa 3.6 1.4 0.2 setosa 5.4 3.9 1.7 0.4 setosa 4.6 3.4 1.4 0.3 setosa 3.4 1.5 0.2 setosa 4.4 2.9 1.4 0.2 setosa 4.9 3.1 1.5 0.1 setosa

O 6. A technology magazine wants to know about how teenagers with their own cell phones use technology to communicate. The histogram illustrates the average number of text messages per hour sent by 26 teenagers who answered an online survey. a) Identify the population and the sample for this study. All teenagers with their own cell phones who use technology to communicate. Describe the shape of the graph. skewed left b) c) Write 1-2 sentences describing the center of the distribution in the context of the data. Include. an estimated interval. The typical number of times teenagers send text d) messages is abouine intends to find numerical summaries for their data and use these to report their findings. Would you advise them to use the mean & standard deviation? Or the median & IQR? Explain. e) Do you expect the mean to be higher than, lower than, or about the same as the median? Explain. 7. The average monthly rainfalls in both Mt. Washington, New Hampshire and Quillayute, Washington…

What are the types, uses and requirements for reference intervals?

4. Out of 400 children, 150 are found to be under weight. Assuming the conditions of simple sampling, estimate the percentage of children who are underweight in, and assign limits within which the per-centago probably lies.

2) Frequency Distribution Table: Touchdown Passes for Frequency 2020 Season Start lower limit of the first class with 15 and use a class width of 5. a) Identify the lower class limit of the 3rd class: b) Identify the upper class limit of the 4th class: c) How many football players had at least 35 touchdowns in the 2020 season? d) Which class had the least number of touchdowns in the 2020 season? e) Which class had the most number of touchdowns in the 2020 season? nionllu name the vertical axis, name the

A sample of 14 participants took part in a hearing experiment. Among other things, the absolute hearing threshold (in decibels) was measured for each participant. The 14 measurements were as follows: 25, 22, 18, 35, 21, 21, 21, 18, 18, 39, 39, 36, 36, 33 Send data to calculator Draw the frequency polygon for these data using an initial class boundary of 17.5, an ending class boundary of 45.5 and 4 classes of equal width. Note that you can add or remove classes from the figure. Label each class with its midpoint. Frequency 8 7- 6. 5 4. 3 Absolute hearing threshold (in decibels) X 00:0

Distribution having more tha tree modes is called distribution. Select one: a. multi-modal b. unimodal c. trimodal d. bimodal