A polling agency wishes to take a sample of voters in a given state large enough that the probability will be 0.95 that the sample mean will not differ from the population mean by more than 25% of the standard deviation. How large a sample should he take?

Q: Find the margin of error for a 95% confidence interval for estimating the population mean when the…

A: Givenconfidence level=95%sample standard deviation(s)=90

Q: 14. The supervisors of a rural county are interested in the proportion of property owners who…

A: Given:-               The supervisors of a rural country are interested in the proportion of…

Q: The data above yields the following information: X 430 0 8730 Y 16 9 0 0 X² 64 49 9 0 Y² 32 21 0 0…

A: Given information:   x y x^2 y^2 xy   4 8 16 64 32   3 7 9 49 21   0 3 0 9 0   0 0 0 0 0…

Q: The rabies vaccine for dogs can save your dog's life. If your dog bites another animal or is on the…

A: Given that The NYC Department of Health wants to know if LESS than 95% of the dogs in the city have…

Q: From the given frequency distribution table, what is the sample siz Weights No. of Students 31-35…

A: from f=given frequency distribution table we have to find sample size.

Q: number generator outputs the sequence of digits shown​ below, where O represents an odd digit and E…

A: Given Significance level 0.05

Q: The table to the right shows selected ages of licensed drivers in one country and the corresponding…

A: age percentile 75 99 65 90 55 75 45 62 35 36 25 15 20 4

Q: Find the standard deviation for the group of data items. Stems 2 3 4 Leaves 6 26 26 The standard…

A: From the provided information, Stems Leaves 2 6 3 2 6 4 2 6

Q: state 1 is 50 and for state 2 is 60.Is this difference significant or just by chance? Use…

A:

Q: Harvard University claims 64% of its Harvard Business School students earn internships on wall…

A: Given that  p = 64% = 0.64 n = 6745 , X = 4435

Q: Calculate the correlation. r = Rou

A: Here wehave given the data, Using this data we have to find the correlation coefficient between the…

Q: Observational Studies and Experiments . Explain why each of the following questions are best…

A: Given Information: To identify whether the given statements are observational studies or…

Q: The government of a large city needs to determine whether the city's residents will support the…

A: The government of a large city needs to determine whether the city's residents will support the…

Q: Consider this equation Average volume of production = 302.23 +3.5(number of employee/s), what is the…

A: Given that  Regression equation  Average volume of production = 302.23 + 3.5(Number of employees)

Q: Suppose that textbook weights are normally distributed. You measure 48 textbooks' weights, and find…

A: Given that  Sample size n =48 Sample mean=43 Population standard deviation =13.1

Q: how do you find X in part b

A: b) The regression equation is y^=31-2x.

Q: Assume that females have pulse rates that are normally distributed with a mean of μ=72.0 beats per…

A: Given that  Females have pulse rates that are normally distributed with a mean of μ=72.0 beats per…

Q: Bill Alther is a zoologist who studies Anna's hummingbird (Calypte anna).† Suppose that in a remote…

A: The given mean is 3.75, population standard deviation is 0.98 and sample size is 6.

Q: Adult men have heights with a mean of 69.0 inches and a standard deviation of 2.8 inches. Find the…

A: Given :     Average (µ) =  69   Standard Deviation (σ) = 2.8

Q: Bill Alther is a zoologist who studies Anna's hummingbird (Calypte anna).† Suppose that in a remote…

A: The sample mean is 3.75, population standard deviation is 0.98 and sample size is 6.

Q: Listed below are body temperatures (in °F) from seven different subjects measured at 8 AM and again…

A: Followings are the Explanation of the question Calculate the Sample Mean and Sample Standard…

Q: MLB Batting Averages 0.28 0.458 0.323 0.31 0.295 Find the sample standard deviation of the data…

A: Given that  x x2 0.28 0.0784 0.458 0.2098 0.323 0.1043 0.31 0.0961 0.295 0.087…

Q: A coach has a sample of 19 students. A coach tests the abilities of his athletes by making them run…

A: Given: A coach tests the abilities of his athletes by making them run laps. He has a sample size of…

Q: 192.00 16.07 23.62 7.60 82.81 17.55 27.08 6.38 26.67 13.00 19.41 4.63 31.47 12.83 20.16 6.16 Percent…

A: From the above data  The graph A is correct

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 4.9…

A: given data, normal distribution μ=4.9σ=1.5you purchased one item , the probability it will last…

Q: finds that a) What is the population of interest? b) What is the parameter of interest in this…

A: Given: Random sample of size N=173 Sample proportion p^=35% p be the  population proportion of red…

Q: Let x be a random variable representing the starting salary of a first-year teacher in a city.  A…

A: Given that  Sample size n =20 Sample mean=51425 Standard deviation =3549

Q: Match the variable to its scale of measurement Program: SAT Math Scores: Gender: Final Exam:…

A: Given that Program: SAT Math Scores: Gender: Final Exam: Credits: GPA:

Q: Suppose a researcher wants to know how a behavioral intervention is affecting the frequency of…

A: Introduction: It is required to choose the most appropriate test.

Q: (e) P(N or M). Are the events W = no reaction and M = mild reaction mutually exclusive? Explain. O…

A: Here we have given the table, Using this table we have to find the probability. Here,  N : no…

Q: TikTok users spend an average of 55 minutes per day using the app. A researcher believes the time…

A: From the provided information, Sample size (n) = 61 Level of significance (α) = 0.05 The test is…

Q: A simple random sample of 1000 people age 18 or over is taken in a large town. It turns out that 323…

A: Given that  n = 1000 , X = 323

Q: Despite tuition skyrocketing, a college education is still valuable. Recent calculations by the…

A: Followings are the Explanation of the question Calculate the Sample Mean and Sample Standard…

Q: Determine whether the following statement is true or false. In a normal distribution, the z-score…

A: We know that, z score for any value x is given by,  z-score= (x-mean)/standard deviation

Q: 1) In each study, the data collected is what level of measurement? a) Letter grade (A,B,C,D,F):…

A: As per Bartleby guidelines I can't answer more than one question per post. Please post other…

Q: Match the name of the sampling method descriptions given. Situations  call every 15th…

A: Defination: Systematic random sampling is the random sampling method that requires selecting samples…

Q: Yaad Peanut is a company in Jamaica. They produce peanut butter. Each jar sells for $800. the…

A:

Q: The contingency table below shows the results of a survey of senior high school students conducted…

A: The following information has been provided:   Private Public Taking Statistics 28 19 Not…

Q: A simple random sample of size n=200drivers with a valid​ driver's license is asked if they drive…

A: given data claim : p > 0.5n = 200x = 123α = 0.05p^ = xn = 123200 = 0.6150

Q: You are given the following information: The underlying loss distribution function for a certain…

A: Given the loss distribution function for a certain line of business in 2019 is Fx=1-x-5 , x>1 The…

Q: What is the main advantage of simple random sampling (SRS) over cluster sampling   a. SRS is…

A: Given information: Selecting the correct option is the main advantage of SRS over cluster sampling.…

Q: Suppose you estimate an AR 2) regression model for Y_t using a time series of T=100 observations.…

A: The estimated regression equation is given as: Yt=0.5-0.2Yt-1+0.1Yt-2. For the period, t=100, it is…

Q: A sample of 51 COVID-19 patients had a mean incubation time of 6.7 days, and a standard deviation of…

A: given data sample size (n) = 51sample mean ( x¯ ) = 6.7sample standard deviatio (s) = 4.090% ci for…

Q: Find the standard deviation for the group of data items. 10, 10, 10, 12, 14, 14, 14 The standard…

A: The following data has been provided: 10,10,10,12,14,14,14

Q: Five friends arrive in London and, independently of each other, embark on Christmas shopping trips…

A: Given n=5  Mean=1.5 hours

Q: Suppose we are testing the null hypothesis H0: μ = 16 against the alternative Ha: μ> 16 from a…

A: given data,hypothesis:H0:μ=16H1:μ>16σ=3n=324z=2.21

Q: Watch the video and then solve the problem given below. Click here to watch the video. 10, 10, 11,…

A: From the provided information, The data values are as follow: 10, 10, 11, 13, 16, 18, 19, 20, 21…

Q: Suppose Y1,Y2,··· ,Yn are i.i.d. continuous uniform(0,1) distributed. (a) Prove that the kth-order…

A: Given that the iid continuous random variables Y1, Y2, . . ., Yn follow Uniform0,1 distribution.

Q: Winning team data were collected for teams in different​ sports, with the results given in the…

A: The claim is that the claim that​ home/visitor wins are independent of the sport.

Q: he SD of the box is 2.24. What is the probability that the sum of the draws will be more than 434?…

A: Given Box contain number {1, 3,5,7} SD=2.24