In a recent study on world​ happiness, participants were asked to evaluate their current lives on a scale from 0 to​ 10, where 0 represents the worst possible life and 10 represents the best possible life. The mean response was 5.4 with a standard deviation of 2.1.   ​(a) What response represents the 89th ​percentile? ​(b) What response represents the 59th ​percentile? ​(c) What response represents the first ​quartile?

Q: Suppose I collect data on the average price of Yuengling (a type of beer) at every bar in…

A:

Q: In a recent study on world happiness, participants were asked to evaluate their current lives on a…

A: μ=5.4, σ=2.6

Q: Six people were asked to determine the amount of money they were carrying, to the nearest dollar.…

A: Mean: Mean is a measure of central location that can be calculated by taking the ratio of sum of all…

Q: (7) The commuting distance(in miles) for 12 students is listed below. 11.5, 21.9, 12.7, 9.0, 19.2,…

A: 7)Given data is11.5, 21.9, 12.7, 9.0, 19.2, 18.5, 19.3, 1.9, 19.2, 0.8, 28.8, 17.7

Q: The annual salaries for people in a particular profession are known to be normally distributed with…

A: Given that the annual salaries for people in a particular profession are known to be normally…

Q: n this scenario, what is the test statistic? A linguist believes the average age children learn a…

A: Given: n= 21.0 ,x̄= 9.2 ,s= 2.5 µ= 10.0 ,degree of freedom= 20.0

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: Type II error = P( Fail to reject Ho| When mu = 25)

Q: Answer the questions below. (a) The 9 participants in an experiment had the following reaction times…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Based on the results that follow, do you think that the standard deviation is different from the two…

A: Let σ be the population standard deviation. Given that, Population standard deviation (σ)=2Sample…

Q: Suppose the people living in a city have a mean score of 53 and a standard deviation of 4 on a…

A:

Q: Suppose that the heights of adult men in the United States are normally distributed with a mean of…

A:

Q: For a sample of 300 students, you find that the mean GPA is 3.35 with a standard deviation of .21.…

A: Solution: From the given information, Standard deviation is 0.21 and n=300.

Q: 1. How much of the data lies between one standard deviation from the mean, two standard deviations…

A:

Q: Suppose that a certain brand of light bulbs has a mean life of 600 hours and a standard deviation of…

A: Solution: Let X be the lifetime of a bulbs. From the given information, X follows normal…

Q: A company wanted to determine the child care costs of its employees. A sample of 25 employees were…

A: Solution :  In above example a value of one of the sample change so we know that standard deviation,…

Q: The average hours of sleep on a weeknight was 6.9 hours with a standard deviation of 1.5 hours. What…

A: Introduction: Denote the random variable, Denote X as the number of hours of sleep on a weeknight.…

Q: Three hundred college freshmen's grade point averages are seen to be nearly regularly distributed,…

A:

Q: The graphs below represent two distinct Standard Deviations from two separate samples.A) Which of…

A: Solution: A. From the graph on the left, it can be observed that the frequencies for all the scores…

Q: Suppose you know the population average wage in the manufacturing industry in the U.S. is $26.72 per…

A: true mean value = 25 mu = 26.72 s = 2.6

Q: A group of 894 women aged 70- 79 had their height and weight measured. The mean height was 159 cm…

A: Introduction -   When Mean and standard deviation are given the formula for range is : Range = Mean…

Q: If you chose to compute a mean for a variable, which measure of variability would you most likely…

A:

Q: (ii) The distribution of heights of students in a large class is roughly bell-shaped. The average…

A: In this context, the average height is 68 inches. Approximately 95% of the heights are 62 and 74…

Q: The Wechsler Intelligence Scale for Children is used, in several languages, in the United States and…

A:

Q: A nutritionist seeks to conduct a clinical trial on the effects of eating papaya on cholesterol…

A: Answer D. What is the minimum number of people I need for the study?

Q: Psychological and educational tests, including MMPI are often designed so they have a mean of 50 and…

A: Given: Mean μ=50 Standard deviation σ=10

Q: Suppose that quiz scores in a beginning statistics class have a mean of 6.5 with a standard…

A: Mean(µ) = 6.5 Standard deviations (σ) = 0.5

Q: For 100 randomly selected adults, compute the mean and standard deviation?

A: A recent poll found that 47% of adults believe that the overall state of moral values is poor.Here…

Q: Explain the term "deviation scores"?

A:

Q: According to Chebyshev's theorem, what is the maximum proportion of data values from a data set that…

A: We know that the Chebychev's inequality states that the P(|X-μ|>kσ) < 1/k2 It can be seen as…

Q: What is the formula for calculating the standard deviation of a set of n observations?

A: Introduction The standard deviation is one of the measures of variability.

Q: A TV weatherman end of the year analysis of the local weather showed that among all the years for…

A: Z-score: The Z-score measures a particular value’s relationship to the mean, in a group of values.…

Q: Question: A sample of 25 items has a mean of 45 and a standard deviation of 5. What is the standard…

A: Introduction: The standard error of the mean (SEM) is a measure of the variability of the sample…

Q: In 1974, the mean height of a woman in the United States was 63.7 inches, with a standard deviation…

A: given data normal distribution μ = 63.7σ = 2.5P(x>z) = 0.88x = ?

Q: Male students in a Calculus 1 course at ASU self-reported their heights in inches. The data below…

A: Given the data of a Calculus 1 course male students height in inches asHeight in…

Q: What are the steps to figuring this out...I can't remember...   On a test with a mean of 100 and a…

A: Given that  Mean of 100 and a standard deviation of 20

Q: Health care issues are receiving much attention in both academic and political arenas. A sociologist…

A: The mean is 74 and the standard deviation is 9.7.

Q: 1. The standard deviation provides an overall measurement of how much participants' scores differ…

A: Given data: The standard deviation provides an overall measurement of how much participants' scores…

Q: The Wechsler Adult Intelligence Scale (WAIS) is the most common “IQ test.” The scale of scores is…

A: Given : Let X be a r.v  with Mean (μ) = 100 Standard deviation (σ) = 15

Q: We have a distribution with a mean of ? = 78.0 and ? = 12.5. Find the raw score equivalents for the…

A: We have given that.   X~N( μ , ?^2 )   μ =78 , ? =12.5   Z-score =( x - μ )/?   NOTE:- According to…

Q: show that the performance of male college students in Mathematics in terms of final grade is 5%…

A: Given that  Level of significance=5%=0.05 Find null and alternate hypothesis

Q: The scores on a psychology exam were normally distributed with a mean of 56 and a standard deviation…

A:

Q: An article in the San Jose Mercury Newsstated that students in the California state university…

A: