Single adults: According to a Pew Research Center analysis of census data, in 2012, 20% of American adults ages 25 and older had never been married. If we randomly sample 100 adults from this population, would it be unusual to see a sample with 13% who had never been married? Recall the standard deviation for a binomial distribution is the square root of npq = the square root of np(1−p)

Q: how many students must be randomly selected to estimate the mean weekly earnings of students at one…

A: Here we need to find the required sample size with 95% confidence. Given SD=54, Margin of error=5.

Q: The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one subtest, the…

A: Answer: Given that:   ‘x’ is Normally distributed with                 Mean  µ =40       standard…

Q: If the Stanford-Binet IQ test is a normal curve with mean of 100 and standard deviation of 20, what…

A: The population mean is 100. The population standard deviation is 20. We have to find the percent of…

Q: Random sampling from four normally distributed populations produced the following data: (image) a.…

A: Excel is used to perform the one-way ANOVA. Steps are as; Enter the data into spreadsheet. Go to…

Q: The following data are from a simple random sample. 5 8 10 8 10 7 (a) What is the point estimate of…

A:

Q: An NHANES report gives data for 657 men aged 20-29 years. The BMI of these 657 men was ?⎯⎯⎯= 26. On…

A: Given Information: The BMI of these 657 men was x¯=26. Standard deviation σ=7.9 The objective is to…

Q: The standard deviation of the following sample of data (not estimating the population SD-Use N in…

A: The given sample is 5, 5, 7, 7. Here, to find SD of sample data.

Q: In an analysis of variance, if SSb/t = 20 and MSb/t = 10, then there were _____ levels.

A: Given : SSB/t = 20 Msb/t = 10 here, K -1 = t ( given)  where K is the number of levels.

Q: A researcher doing a cola taste test would like to calculate the relationship between people's age…

A: The objective of the question is to identify the appropriate statistical test to determine the…

Q: It is assumed that the lifetime of a particular type of battery is normally distributed with mean of…

A: Obtain the percentage that the estimate of a random battery lasting between 200 and 225 hours. The…

Q: If the standard deviation of sample A  is 5 and the standard deviation of sample B  is 12, what is…

A:

Q: The following data are from a simple random sample. 6 8 11 7 10 12 (a) What is the point estimate of…

A: The data table provided in the question is as follows :-681171012

Q: Question 2. What is the probability that between 85 and 120 complaints are received in one week? Use…

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

Q: What is the Standard Deviation for the following numbers: Variance = 251

A: It is given that  The variance is 251.

Q: SAT scores are normed so that, in any year, the mean of the verbal or math test score should be 500…

A: Reviewing information, X : SAT scores of students for math test  Mean=500 Sd=100

Q: According to a​ study, brain weights of men in country A are normally distributed with a mean of…

A:

Q: Problem 6. On a particular production line, the likelihood that a light bulb is defective is 7%.…

A: It is given that the number of observations are independent with the probability of success p = 7% =…

Q: Suppose scores on the final exam for Principles of Statistics are normally distributed with a mean…

A: Empirical rule: The probability of the observation lies within 1 standard deviation of the mean,…

Q: Recent results suggest that children with ADHD tend to watch more TV than children who are not…

A: Given Information- Sample size, n = 36 Sample mean, x-bar = 4.9 hours Population mean, μ = 4.1…

Q: If you observe the values of a normally distributed variable for a sample, a normal probability plot…

A: Requirement of normal distribution:If the plot is roughly linear then the variable is approximately…

Q: Given a normal population with mean = 39 and variance = 16, what is the probability of obtaining an…

A:

Q: Each observation in a random sample of 101 bicycle accidents resulting in death was classified…

A: The total number of accidents is 101.

Q: An ecologist is examining whether the number of fish caught in a large river basin has changed since…

A:

Q: What is the Standard Deviation for the following numbers: Variance = 284

A:

Q: The number of potholes in any given 1 mile stretch of freeway pavement in Pennsylvania has a…

A: Obtain the approximate percentage of 1-mile long roadways with potholes numbering between 15 and 59.…

Q: A question is asked of a class of 1,200 freshmen, and 24% of the students know the correct answer.…

A:

Q: The following random sample from some population is given: -1 1 3 1 -1 1 0 3 301 3 -1 0 1 0 1 Find…

A: Given,sample size(n)=17

Q: It is known that the population variance equals 522. What is the sample size that needs to be taken…

A: It is given that:

Q: If random samples, each with n = 16 scores, are selected from a normal population with µ = 100 and σ…

A: Here, the known values are n = 16 scores, µ = 100 and σ = 20.

Q: (c) Longevity: Honolulu USA Today reported that the state with the longest mean life span is Hawaii,…

A: For the given data Find all the required

Q: If the mean for a binomial distribution is 16.34 and there were eighty-six trials, find p. p =

A: given data  binomial distribution μ = 16.34 n = 86 p = ?

Q: A random sample of 37 MBAs working in New York revealed that their mean annual salary was $132,000.…

A: Givensample size(n)=37Mean(x)=132000standard devaition(σ)=31000