sample of assistant professors on the business faculty at state supported institutions in Ohio revealed the mean income to be $32,000 for 9 months with a standard deviation of $3,000. Using Chebyshev's Theorem, what is the proportion of faculty that earns more than $25,250 but less th
Q: When Morgan runs the 400 meter dash, her finishing times are normally distributed with a mean of 81…
A: From the information, given thatLet X denotes the finishing times which follows normal distribution…
Q: According to one study, the average hours of sleep on a weeknight for men was 6.9 hours with a…
A:
Q: A significant number of students completed a Statistics exam, and the final marks had a mean of 70…
A: Answer - A significant number of students completed a Statistics exam, and the final marks had a…
Q: It is estimated that amounts of money spent on gasoline by customers at a gas station follow a…
A: Given info: amounts of money spent on gasoline by customers at a gas station follow a normal…
Q: According to a recent survey, the salaries of assistant professors have a mean of $40,756 and a…
A: Determine the Z score for the random variable X equals 45,000. The Z score for the random variable…
Q: An economist wants to find out if there is difference in the monthly expenses of families from…
A:
Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…
A: Obtain the 99% confidence interval to estimate the true difference between the mean salaries for…
Q: A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by…
A: Given information- Population mean, μ = $53 Sample size, n = 100 Sample mean, x-bar = $60 Sample…
Q: Among social work students, the variable "number of textbooks purchased during the academic year"…
A: The Normal distribution is also called as the Gaussian distribution. It is the most common…
Q: An article in the Register stated that students in the state university system take 4.5 years, on…
A: Givensample size(n)=49Mean(x)=5.1standard deviation(s)=1.2significance level(α)=0.01
Q: Use Chebyshev's theorem to solve the problem. Find the least possible fraction of numbers in a data…
A: Consider that a random variable X has expected value μ and standard deviation, σ. Now, according to…
Q: According to a recent survey, the salaries of assistant professors have a mean of $41,750 and a…
A: To get the proportion of professor who earn more than $48,000 we proceed as follows…
Q: health economist does a study on the average life expectancy of every country in Europe. The…
A: Given, mean life of the country is 81.2 and standard deviation is 3.7. Z-score is 1.2. We will use…
Q: A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by…
A: The summary of statistics is,
Q: Suppose 18% of movie-goers say that horror is their favorite movie genre. If a random sample of…
A: Obtain the mean number of movie-goers that prefer horror movie genre. The mean number of movie-goers…
Q: Suppose that the distribution of income in a certain tax bracket is approximately normal with a mean…
A: Probability distribution: A probability distribution function is the statistical function that…
Q: How good was Wilt Chamberlain's 1961-1962 season compared to the rest of the NBA
A: Given that How good was Wilt Chamberlain's 1961-1962 season compared to the rest of NBA Basketball…
Q: Three hundred college freshmen's grade point averages are seen to be nearly regularly distributed,…
A:
Q: Suppose the prevalence of type II diabetes in a community is 36%. Researchers want to sample 16…
A:
Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…
A: Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries…
Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…
A: The mean is 500 and the standard deviation is 100.
Q: Suppose that salaries for recent graduates of one university have a mean of $24,900 with a standard…
A:
Q: A marketing researcher wants to estimate the mean amount spent per year (5) on a web site by…
A: Given information Hypothesized mean µ = $49 Sample size (n) = 130 Mean x̅ = $55 Standard deviation…
Q: A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by…
A: Let, X = Amount spent per year ($) on a web site by membership member shoppers. Given that;…
Q: Suppose that prices of recently sold homes in one neighborhood have a mean of $265,000 with a…
A: For the distribution of the price of the recently sold homes, the parameters are specified as…
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: 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: In a recent study, the Centers for Disease Control and prevention reported that diastolic blood…
A: The problem provides us with the following values:Mean (μ) = 80.5 mmHgStandard deviation (σ) = 9.9…
Q: A study by the National Center for Health Statistics suggested that women between the ages 20 and 29…
A: The objective of this question is to find the proportion of women between the ages of 20 and 29 in…
Q: Ted had the lowest ERA (earned-run average, mean number of runs yielded per nine innings pitched)…
A: According to the given information in this question We need to find the z score
Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…
A: The sample size for population 1 is 16, sample mean is 47000 and sample standard deviation is 5200.…
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: Suppose that salaries for recent graduated of one university have a mean of $25,500 with a standard…
A:
Q: Assume that the mathematics scores on the SAT are normally distributed with a mean of 500 and a…
A: normal distributionμ = 500σ = 100P(570<x<640) = ?
Q: Suppose the annual employer 401K cost per participant is normally distributed with a mean of $770.…
A: Let X be the random variable representing the cost per participant. Then, X~N(μ,σ2),where…
Q: If the weekly grocery expenditure of households in a certain urban market is known to be normally…
A:
Q: The average chef at a restaurant earns $17 an hour with a deviation of $1.75. What are the chances…
A:
Q: A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by…
A: Given values, n=100x¯=60s=55
Q: An economist wants to find out if there is difference in the monthly expenses of families from…
A:
Q: Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One…
A: The sample size for population 1 is 15, sample mean is 50000 and sample standard deviation is 9200.…
Q: A recent study found that 69% of all adults over 50 wear sunglasses for driving. In a random sample…
A: Formula : Mean = np Standard Deviation :
Q: In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the mean.
A: Given that In a bell-shaped distribution, 95 % of the data falls within 1 standard deviation of the…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
- According to the U.S. Bureau of Labor Statistics, all workers in America who had a bachelor's degree and were employed earned an average of $1152 a week in 2010. A recent sample of 676 American workers who have a bachelor's degree showed that they earn an average of $1171 per week. Assume that the population standard deviation is $165. Test the claim that the current mean weekly earnings of American workers with a bachelor's degree is greater than $1152. Show all the steps of a hypothesis test.Suppose that the annual household income in a small Midwestern community is normally distributed with a mean of $55,000 and a standard deviation of $4,500. What minimum income does a household need to earn to be in the top 5% of incomes? What maximum income does a household need to earn to be in the bottom 40% of incomes?Assume the average selling price for houses in a certain county is $308,000 with a standard deviation of $57, 000. Using Chebychev's Theorem, determine the range of prices that includes at least 91% of the homes around the mean.
- According to the U.S. Census, the average adult woman is the United States is 65 inches tall and the standard deviation is 3 inches. If Zsike is 67 inches tall, what is her z-score?A college student is interested in investigating the claim that students who graduate with a master’s degree earn higher salaries, on average, than those who finish with a bachelor’s degree. She surveys, at random, 49 recent graduates who completed their master’s degrees, and finds that their mean salary is $37,400 per year. The standard deviation of annual salaries for the population of recent graduates who have master’s degrees is known to be $2400. She also surveys, at random, 37 recent graduates who completed their bachelor’s degrees, and finds that their mean salary is $36,700 per year. The standard deviation of annual salaries for the population of recent graduates with only bachelor’s degrees is known to be $1900. Test the claim at the 0.05 level of significance. Let recent graduates with a master's degree be Population 1 and let recent graduates with a bachelor's degree be Population 2. Step 2 of 3 : Compute the value of the test statistic. Round your answer to…A random sample of 160 commercial customers revealed that 32 had paid their accounts within a month of billing. Can normality be assumed for the sample proportion?
- An article in the San Jose Mercury News stated that students in the California state universitysystem take 4.25 years, on average, to finish their undergraduate degrees. Suppose you believe that the mean time is longer. You conduct a survey of 64 students and obtain a sample mean of 4.5 with a sample standard deviation of 1.5. Do the data support your claim at the 1% level?Is it worth pursuing a doctoral degree in education if you already have an undergraduate degree? One way to help make this decision is to look at the mean incomes of these two groups. Suppose that 15 people with bachelor’s degrees in education were surveyed. Their mean annual salary was $31,500 with a standard deviation of $7900. Seventeen people with doctoral degrees in education were found to have a mean annual salary of $47,500 with a standard deviation of $6900. Assume that the population variances are not the same. Construct a 99% confidence interval to estimate the true difference between the mean salaries for people with doctoral degrees and undergraduate degrees in education. Let Population 1 be the salaries for people with doctoral degrees and Population 2 be the salaries for people with undergraduate degrees. Round the endpoints of the interval to the nearest whole number, if necessary.It is known that incomes from the USA follow a normal distribution with a mean of $55,000 and a standard deviation of $12,000. A researcher took a sample of 100 people in the USA and obtained a sample mean of $67,000 with a standard deviation of $18,000. What are the characteristics of the sampling distribution. A. Mean = $55,000 and Standard Deviation of the Mean = $1200 B. Mean = $55,000 and Standard Deviation of the Mean = $12000 C. Mean = $67,000 and Standard Deviation of the Mean = $569.21 D. Mean = $67,000 and Standard Deviation of the Mean = $1800
- A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by membership member shoppers. Suppose a random sample of 100 membership member shoppers who recently made a purchase on the web site yielded a mean amount spent of $55 and a standard deviation of $52. Complete parts (a) and (b) below. a. Is there evidence that the population mean amount spent per year on the web site by membership member shoppers is different from $51? (Use a 0.01 level of significance.) State the null and alternative hypotheses. Ho: H (Type integers or decimals. Do not round. Do not include the $ symbol in your answer.) Identify the critical value(s). The critical value(s) is/are (Type an integer or a decimal. Round to two decimal places as needed. Use a comma to separate answers as needed.) Determine the test statistic. The test statistic, 1STAT, is (Type an integer or a decimal. Round to two decimal places as needed.) State the conclusion. Ho. There is evidence that the…An analyst found that the average amount of money in bank accounts at his/her bank is $2,000 with a standard deviation of $150. What would be the variance?A marketing researcher wants to estimate the mean amount spent per year ($) on a web site by membership member shoppers. Suppose a random sample of 100 membership member shoppers who recently made a purchase on the web site yielded a mean amount spent of $58and a standard deviation of $55.Complete parts (a) and (b) below. a. Is there evidence that the population mean amount spent per year on the web site by membership member shoppers is different from $51? (Use a 0.01 level of significance.) State the null and alternative hypotheses.
