2. In the mid-19th century, Sir Francis Galton demonstrated, through extensive data collection, thatmany human characteristics such as height and IQ are distributed throughout the entire populationin accordance with the normal distribution. Galton recorded the heights of 8585 men in GreatBritain. This forms a normal distribution with mean u = 67 inches and standard deviation o =2.5inches. (d) What height corresponds to the 95th percentile in the Galton study?

Answered: Image /qna-images/answer/97ae92ac-fbd3-481f-9990-26dd184d38f4.jpg

Answered: (d) What height corresponds to the 95th…

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 scientific study was conducted to determine the hours of sleep that college students get per night. The study surveyed 20 college students and obtained the following data:8, 8.3, 7.8, 7.7, 8.6, 8.1, 7.7, 8.5, 8.1, 8.2, 8.2, 7.9, 8.5, 7.9, 8.3, 8.2, 7.8, 7.8, 7.8, 7.7Assuming the population standard deviation is σ=0.31σ=0.31, construct a 86% confidence interval for the average hours of sleep per night that college students get.xˉ=x̄=α2=α2=zα2=zα2=Margin of Error: E=E=We are 86% confident that college students get an average of between hours and hours of sleep per night. Submit QuestionQuestion
2. In studying the effect of a drug for treating patients with respiratory problems, a researcher obtained a sample of 12 consenting patients, who, after discussion with their doctor, chose a respiratory drug they would receive. Patients' respiratory tests were assessed twice over a two-month period after initiating the treatment. Research question: The researcher wants to know if there is a significant difference between the group in their second test and those that didn't take the drug in their overall mean of 3.35 in average respiratory scores with a standard deviation of .08. Is there a difference between the two means - does the drug work? Carry out 9 steps of hypothesis testing. Respiratory Test 2 3.4 3.4 3.3 3.4 3.3 3.3 3.3 3.2 3.2 3.2 3.2 3.3 Σ-39.5
A study claims that the Netherlands has the tallest adults of any country with an average height of 6.14 ft. Trent wants to test this claim. He randomly measures the heights of 31 dutch adults and obtains the following data, in feet: 5.23, 6.6, 5.67, 6.44, 7.39, 6.14, 5.86, 4.09, 5.6, 5.68, 6.13, 5.87, 3.95, 5.61, 5.69, 6.83, 7.45, 6.03, 5.5, 5.75, 6.94, 5.65, 7.64, 2.83, 4.42, 5.5, 6.21, 6.53, 6.75, 6.01, 4.35 Should Trent reject the claim? Step 1: State the hypothesis. ? v = Step 2: Determine the Features of the Distribution of Point Estimates Using the Central Limit Theorem. By the Central Limit Theorem, we know that the point estimates are Select an answer with distribution mean and distribution standard deviation Step 3: Assuming the Claim is True, Find the Probability of Obtaining the Point Estimate. P(? v? v P(?v?
A governmental agency computed the proportion of violent crimes in the United States in a particular year falling into each of four olo categories. A simple random sample of 550 violent crimes committed in California during that year were categorized in the same way. The following table presents the results. U.S. California Category Proportion Frequency Murder 0.012 Forcible Rape 0.058 20 Robbery 0.360 207 Aggravated Assault 0.570 318 Send data to Excel Can you conclude that the proportions of crimes in the various categories in California differ from those in the United States as a whole? Use the 0.01 level of significance and the P-value method with the TI-84 Plus calculator. Part: 0 / 4 Part 1 of 4 (a) State the null and alternate hypotheses. Save For Later Submit Assignment Check Answer Skip Part O 2021 McGraw-Hill Education. All Rights Reserved. Terms of Use Privacy (? 5/2 Search insert 山园

The percentile is the: Question 5 options: same thing as a percentage. percentage of scores falling at or below a particular raw score. percentage of scores falling at or above a particular raw score. percentage of scores falling between a particular raw score and the mean.
The CEO of a small company earns $400,000 per year, and the 10 employees each earn $50,000 per year. Which of the measures of central tendency of data ( shown below) is strongly affected by the CEO's salary? why? a) the mean b) the median c) the mode d) none of the above
Matt Gaetz, a health educator, wants to evaluate the effect of a dental film on the frequency with which children brush their teeth. A random selection of 8 children are used for the experiment. First, a baseline of the number of times the children brush their teeth over a month's period is established. Next, the children are shown the dental film and again the number of teeth brushings are recorded for a month. The following data are recorded. Subject 1 2 3 4 5 6 7 8 After Film 28 29 25 30 25 27 28 24 Baseline 25 28 22 30 26 24 25 22 a. What is the null hypothesis? b. What is the alternative hypothesis c. What is your conclusion, using an alpha of 0.05 (2 tailed)?
Because of the popularity of movies as an entertainment medium for college students, you plan to do a national study of the average cost of a movie ticket. If you assume that σ=$0.50, what sample size would you have to take to be 95% confident that your estimate was within $0.25 of the true mean ticket prices
Researchers wished to know if they could conclude that two populations of infants differ with respect to mean age at which they walked alone. The following data (ages in months) were collected: Sample from population A: Sample from population B: 9.5, 10.5, 9.0, 9.75, 10.0, 13.0, 10.0, 13.5, 10.0, 9.5, 10.0, 9.75 12.5, 9.5, 13.5, 13.75, 12.0, 13.75, 12.5, 9.5, 12.0, 13.5, 12.0, 12.0 What should the researchers conclude? Let a = .05.
The following table is a frequency distribution for road rage incidents during one week: Sunday: 5, Monday: 5, Tuesday: 11, Wednesday: 12, Thursday: 11, Friday: 18, Saturday: 7 At the 5% significance level, do the data provide sufficient evidence that road-rage incidents are more likely to occur on some days than on others?
An ANOVA is used to compare the mean GPA of the following groups of students.
A sample of 250 employees of a company is selected, and the average age is found to be 35 years. This value is a statistic or parameter.

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