A school has 650 students. Each student studies one of Analytical Chemistry or Health Care or Biochemistry or Biostatistics and Epidemiology. The table shows the number of students who study each of these courses. An inspector wants to look at the work of a stratified sample of 70 of these students. Find the number of students studying each of these courses that should be in the sample.  Courses Number of Students   Analytical Chemistry 145   Health Care 121   Biochemistry 198   Biostatistics and Epidemiology 186

Q: Identify the type of sample ( Experimental or Observational) Then tell if the sample is biased 7.…

A: Observational : It is the study in which researcher records or observes the observations without…

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A:

Q: A personal trainer is trying to decide which type of diet plan to recommend. He is considering 3…

A: A personal trainer is trying to decide which type of diet plan to recommend. He is considering 3…

Q: a. The proportion of Pennsylvanians with a high school diploma is equal to 0.83. b. The proportion…

A:

Q: A trainer is trying to decide which type of workout plan to recommend. He is considering 3 different…

A: Given Information:  Plan 1 Plan 2 Plan 3 8.2 5.2 4.1 8.9 6 5.25 10.1 6 4.9 9.2   3.67…

Q: Calculate the coefficient of variation for products sold per store using this sample data 0, 77, 38,…

A: From the provided information, The data values are as follow: 0, 77, 38, -5, 44, 62

Q: How many people took part in this survey? * The table shows data about what type of phones that…

A: To arrange the data of two categorical variables, two ways contingency table is used. The first row…

Q: The following are the ages of 13 physics teachers in a school district.  24, 28, 29, 41, 41, 43,…

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Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: ind the sample mean for the given data set, 25,64,38,76,48

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Q: A researcher randomly selected 100 adults aged 18-25 and 100 adults aged 50-60. Within each age…

A: Given, A researcher randomly selected 100 adults aged 18-25 and 100 adults aged 50-60. Within each…

Q: Government agencies carefully monitor water quality and its effect on wetlands.† Of particular…

A: Variable is any quantity that can be measured. There are quantitative as well as qualitative…

Q: A total of 125 hazardous waste sites are operated by waste management companies in a state.  The…

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Q: Of the boys in grades 4, 5 and 6 in elementary schools in Michigan, what proportion have as primary…

A: It is given that Total number of students = 569 Number of boys = 272 Number of girls = 297

Q: One of the tightest Senatorial races on Tuesday is in Maine. In a race that could prove pivotal for…

A: From the provided information, Sample size (n) = 1365 voters 696 responded that they are likely to…

Q: Find the variance for this data set of numbers: 58,64,24,28,38,46

A: Given sample is: 58,64,24,28,38,46. Sample size = n = 6.

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: A genetics experiment involves a population of fruit flies consisting of 1 male named Andre and 3…

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Q: class contains 8 students. Find the number of ordered sample of size 3 with replacemen

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Q: A personal trainer is trying to decide which type of workout plan to recommend. He is considering 3…

A:

Q: Determine whether the sample is biased or unbiased

A: Given a situation, we need to find whether it is biased or unbiased.

Q: A researcher wants to estimate voting trends of women in Texas. Which characteristic is needed in…

A: Here researcher interested in voting trends of women in Texas.

Q: ks whether books are checked out by an adult or a child. She records this data for every fourth…

A: d) Given the librarian, check the books returned by the adults or a child are tracked. She records…

Q: Find sample standrad deviatiom of data 5,7,1,8,26,25,20,17,14,19,5,8

A: x x-x (x-x)2 5 -7.9167 62.67414 7 -5.9167 35.00734 1 -11.9167 142.0077 8 -4.9167 24.17394…

Q: A researcher conducted a paired samples study to investigate whether local car dealers tend to…

A: Given :

Q: Find the variance for the data set 34,76,53,87,62

A: From the provided information, The data values are as follow: 34, 76, 53, 87, 62 Sample size (n) = 5

Q: What is Sample?

A:

Q: estimate the sample size for a population of 750 people.

A: To estimate the sample size the required calculation can be defined by the formula  Slovin's…

Q: If we wanted a random sample of students in a cafeteria, why couldn't we just take the students who…

A: Answer: Here random word itself says that we couldn't just take the students who order coke with…

Q: Does the population proportion and sample proportion always have the same value?

A: The question is about parametric inference.Introduction :Population proportion :The value of…

Q: State one possible advantage of using paired samples instead of independent samples.

A: Provide the possible advantage of using paired samples instead of using independent…

Q: Briefly explain how theory development might impact the selection of a sample.

A: Find: The theory development might impact the selection of a sample.

Q: You are an education researcher interested in studying if race or ethnicity affects the severity of…

A: You are an education researcher interested in studying if race or ethnicity affects the severity of…

Q: The table below shows the grades of the 20 students of a martial arts class. There are three grades:…

A: Given, the grades of the 20 students of a martial arts class. There are three grades:…

Q: Thirty-two percent of all Americans drink bottled water more than once a week (Natural resources…

A: Given: The population proportion, P = 0.32 Part a: The sample proportion, p¯ is an unbiased estimate…