A survey asks a random sample of 1500 adults in Ohio if they support an increase in the state sales tax from 5% to 6%, with the additional revenue going to education. Let ô denote the proportion in the sample who say they support the increase. Suppose that 55% of all adults in Ohio support the increase. The standard deviation of the sampling distribution is Round your answer to four decimal places.

Q: The average travel time to work for a person living and working in Kokomo, Indiana is 17 minutes. I…

A:

Q: In a Statistics course the professor uses the following grading policy: the bottom 5% of students…

A: Given that  b .Find the probability that a randomly selected student gets an 80 or better? c.…

Q: Multiplying every score is a sample by a constant value will change the value of the standard…

A: Standard deviation is a measure of the amount of dispersion of a set of values. It is obtained by…

Q: In a departamental examination in  statistics given to 500 students, the mean score was 75 with a…

A: A z score tells us where score is lies on normal distribution curve. if z score is is zero is it…

Q: Let X = (5400 4900 6300 6700 )T be the estimates in dollars for the cost of replacing a roof on…

A: Given:                  X=5400, 4900, 6300, 6700 A sample mean refers to the average of a set of…

Q: Suppose that the exam scores of a statistics class were normally distributed with a mean of 94 and…

A: Solution: Let X be the exam score of a statistics class. From the given information, X follows…

Q: Suppose the people living in a city have a mean score of 40 and a standard deviation of 7 on a…

A: As per guidelines, we will only solve first three subparts, please repost other questions for more…

Q: According to a government study among adults in the 25-to 34-year age group, the mean amount spent…

A: Mean()=2080standard deviation()=480

Q: A data set lists weights​ (lb) of plastic discarded by households. The highest weight is 5.37 ​lb,…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: For a group containing 100 observations, the arithmetic mean and standard deviation are 8 and √10.5.…

A: The mean value of a data set can be given by the sum of observations with the number of…

Q: In order to estimate the average time spent per student on the computer terminals at a local…

A: sample size(n) = 81population standard deviation = 1.5 hoursstandard error for mean = ?

Q: A poll was conducted on a representative sample of 600 adults living in the United States in order…

A: A poll was conducted on a representative sample of 600 adults living in the United States in order…

Q: Spending on concessions at the movies varies by age of the movie goer. A random sample of 100 adults…

A: It is given that the random sample of 100 adults, 70 purchased popcorn in their 40’s. Another sample…

Q: a. n=2 ∑ni=1xi=20. The mean is b. n=4 ∑ni=1xi=80 The mean is

A: It is given that,Part a) Part b) To find the mean value in both cases.

Q: ould have the right to marry. (The 2014 data were collected before the 2015 US upreme Court decision…

A: There are four types of level of measurement, i.e.,  Ratio scale: data is continuous and have a…

Q: 2000 5 2001 2002 2003 4. 2004 2005 2006 2007 3 4. Find the mean, median, mode, standard deviation…

A:

Q: s known that o = 2.15 pounds. %3D sample should be taken to be 93% confident that the sample mean is…

A: The sample size can be calculated as: n=z×σE2 Here, z = desired confidence level E = The allowable…

Q: A statistician uses Chebyshev's Theorem to estimate that at least 90 % of a population lies between…

A: We have to find correct answer for given data..

Q: For a population, a deviation score is computed as X – σ.

A: What is Deviation score ? Deviation score is basically a degree of score from which a raw score is…

Q: . A distribution has a coefficient of variation of 65% and mean of 47. What is the value of the…

A:

Q: Last year the revenue for utility companies had a mean of $60 million with a standard deviation of…

A:

Q: (Simplify your answer.) (Simplify your answer.)

A: It is given that  Mean, μ = 73 Standard deviation, σ = 6 Sample size, n = 36

Q: The marital status distribution of the U.S. male population, age 15 and older, is as shown below.…

A: The data set is, Martial Status Frequency Percent never married 136 31.3 married 241 56.1…

Q: Find the critical value. The critical value is zo =. %3D

A: Given α=0.10

Q: If the coefficient of variation for a data is given as 35%, and the standard deviation for the same…

A: given data coefficient of variation = 35% so cv = 0.35 sd = 32 mean  = ?

Q: Suppose a random sample of n= 320 teenagers 13 to 17 years of age was asked if they use social…

A:

Q: Refer to the figure at the right. At a= 0.10, can you reject the claim that the proportion of 18 to…

A: Denote p1, p2 as the true population proportions of 18-24-year-olds men and women, who living in…

Q: The percent fo Coloradans that own a Subaru is 56%. If you were to take a random sample of size 70,…

A: We have given that,  Let X be the random variable from binomial distribution with probability (p) =…

Q: A distribution of data has a mean of 26 and a standard deviation of 2. How many standard deviations…

A: Population mean μ =26 Population standard deviation =2

Q: The average final exam score for the statistics course is 77% and the standard deviation is 8%. A…

A: The average final exam score for the statistics course is 77% and the standard deviation is 8%. From…

Q: Assume that 1,500,000 people take the ACT each year and their scores form a normal distribution. If…

A: Given that,1,500,000 people take the ACT each year and their scores form a normal distribution. We…

Q: Suppose that employees at a large company have salaries that are normally distributed, with a mean…

A: We have given that, Let X be a random variable i.e. salaries of employees are normally distributed…

Q: Percentage of 18-to 24-year olds living in parents' homes Refer to the figure at the right. At a =…

A: For the given data perform z test for two proportion test

Q: A statistics professor surveys all 100 of the students in an introductory statistics lecture. The…

A: In this context, it that the professor conducts the survey on all 100 students in an introductory…

Q: elect ALL the ways that variation in the data can be measured below. A. The mean of the data B. The…

A: We have to find ways that variation in the data can be measured

Q: For a sample of employees at a manufacturing company, their age of retirement was recorded and is…

A:

Q: The standard deviation of a sample is inversely proportional to the square root of its sample size.…

A:

Q: The proportion of adult women in a certain geographical region is approximately 51%. A marketing…

A: Find the proportion of sample of 200 that are expected to be women:Here, it is given that,…

Q: Leave all probabilities as percentages. Define x on all problems with data. The number of…

A: The given data is 74, 52 and 83. a. sample mean- b. sample standard deviation is found using Excel.…

Q: Ten percent of the world's population is left-handed. A researcher claims that left-handed…

A: Given dataTen percent of the worlds population are left handed.A researcher took a sample of 900…

Q: Find the standardized test statistic. z= 2.29 (Round to two decimal places as needed.) Can you…

A: Sample sizes n1=248 , n2=244 Sample proportion p1^=0.515 , p2^=0.412

Q: For a sample of 120 businesses, the average profit they generate in a month is $54,000 with a…

A: