An understanding of statistics is necessary in any job. The use of statistics can help provide answers to many questions. Please, post a question you think that statistics may help you answer and explain why statistics can help provide an accurate answer. Read several of your classmates' postings. Do you agree that statistics are necessary to answer their questions? Is their question one that you would also like to have an answer to? Why or why not?

Q: Suppose that you have eight cards. Five are green and three are yellow. The five green cards are…

A: Suppose that you have eight cards. Five are green and three are yellow.Note: According to bartelby…

Q: Based on a random sample of 50, a 95% confidence interval for the population proportion was…

A: Sample size Confidence level is 95%.Based on the given sample size and confidence level, a 95%…

Q: The lengths of pregnancies are normally distributed with a mean of 269 days and a standard deviation…

A: From the provided information,

Q: Blue Box is testing a new “half price on Tuesday” policy on DVD rentals at a sample of 10 locations.…

A: There are two dependent samples which are New Price and Old Price.We have to test whether the mean…

Q: A manufacturer knows that their items have a normally distributed lifespan, with a mean of 2.1…

A: Mean()=2.1 yearsStandard deviation()=0.7 years

Q: instructor believes that students take more than 2 classes per quarter on averag viewed a class of…

A: Sample size n=24Sample mean=2.3Standard deviation=0.8

Q: Determine the sample size required to estimate a population mean to within 8 units given that the…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: A total of 8 popular brands of cola are to be used in a blind taste study for consumer recognition.…

A: The total number of brands is 8. The number of brands chosen randomly is 5.

Q: You have been hired by "Indo," the new Indonesian automobile manufacturer to build a model of U.S.…

A: Given the model of the price of 35 different American-made 2016 U.S. sedans as

Q: Sample 1: n₁ = 6, x₁ = 27.7, s₁ = 9.44 Sample 2: m₂ = 19, x₂ = 27.2, s₂ = 8.4 (a) The degree of…

A: Sample 1:Sample size Sample mean Sample standard deviation Sample 2:Sample size Sample mean Sample…

Q: X P(x) 0.05 0.15 0.15 3 0.65 012 Find the standard deviation of this probability distribution. Give…

A: Probability mass function of Xx0123P(x)0.050.150.150.65

Q: The height of women ages 20-29 is normally distributed, with a mean of 64 inches. Assume a 2.7…

A: Mean (μ) = 64Standard deviation(σ)=2.7Sample size(n) = 27

Q: You want to obtain a sample to estimate the proportion of a population that possess a particular…

A: From the provided information,p* = 0.23E = 0.04Confidence level = 98%

Q: suppose that for a sexually active male drosophila fruit fly in a particular genetics lab the…

A: Given that for a sexually active male drosophila fruit fly in a particular genetics lab the…

Q: Claim: Fewer than 9.6% of homes have only a landline telephone and no wireless phone. Sample data: A…

A: Let p is the parameters that represent the proportion of homes that have only a landline telephone…

Q: You want to obtain a sample to estimate a population mean. Based on previous evidence, you believe…

A: σ=71.9,E=3,CI=98%=0.98α=1−CI=1−0.98=0.02

Q: The below data on the production volume x and total cost y (in dollars) for a particular…

A: here X denotes production volume  and Y denotes total cost.We also have given a regression equation…

Q: Please give solution in correct and step by step detailed explanation format thanku Don't give…

A: Statistical tests are used to make quantitative decisions about a process or processes.

Q: The population mean and standard deviation are given below. Find the required probability and…

A: We have to find that the probability of sample mean being greater than 221.

Q: why is the DV female drosophila Do you use a z or test for this problem?

A: For male μ=38.9,σ=population standard deviations=12,  n=size=24, X¯=62.5

Q: Break.com is an ad-supported video-sharing website. Its advertisers can choose to have their ad…

A: n=60,x¯=1,σ=0.25,CI=95%=0.95α=1−CI=1−0.95=0.05

Q: Suppose the probability of contracting a certain disease is 1 in 69 for a new case in a given year.…

A: P( new case) ==0.0145q=1-p=1-0.0145=0.9855n=110 people

Q: 7. Given below a list of the weights of 20 students from GUST 97, 67, 72, 79, 83, 83, 51, 59, 65,…

A: 97, 67, 72, 79, 83, 83, 51, 59, 65, 72, 75, 90, 80, 85, 58, 51, 97, 63, 62, 97

Q: a. What is the probability that more than half have passed the exams? b. What is the probability…

A: Given,the pass percentage in 2020 CBSE 12th grade = 88.78%.percentage of students who scored 90% and…

Q: A random sample of the closing stock prices in dollars for a company in a recent year is listed…

A: 18.08,15.79,16.45,20.42,20.88,15.65,17.09,15.38,15.64,19.56,16.84,16.95,19.31,18.69,21.66,17.14

Q: Question 3 a) A traffic survey was carried out to establish a vehicle count at an intersection. A…

A: Vehicle count(x)31532357128816185585472563428445543349621523535725824243564693212635353763756

Q: The inside diameter of a randomly selected piston ring is a random variable with mean value 8 cm and…

A: The given information is

Q: how did you find the answer to a? what were the steps?

A: The mean of the distribution,  million visitors per dayThe standard deviation of the distribution,…

Q: (4.20 Purchasing digital devices for children. Refer to the PC Magazine (December 2019) article on…

A: Since you have posted a question with multiple subparts, we will provide solution to the first three…

Q: Risk taking is an important part of investing. In order to make suitable investment decisions on…

A: Mean(µ) = 49Standard deviations (σ) = 16

Q: Find the indicated probability and interpret the result. From 1975 through 2020, the mean annual…

A:

Q: For each of the following situations, write down the likelihood function L(θ), where θ is the…

A: is the probability of heads.and  is the likelihood probability.

Q: Use the TI-84 Plus calculator to find the z-scores that bound the middle 82% of the area under the…

A: The middle area = 0.84.The Z-scores are to be answered.

Q: According to the Vivino website, suppose the mean price for a bottle of red wine that scores 4.0 or…

A: The given data is as follows:Sample size, Sample mean, Sample standard deviation,

Q: Are Republicans just as likely as Democrats to display the American flag in front of their residence…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: If the number of independent variables is 5 and the number of observations is 10, the degrees of…

A: Number of independent variable =5Number of observation=10We have to find the degree of freedom:

Q: Verify the area under the curve is equal to 1. Choose the correct explanation below. OA. The area…

A: It is given that a uniform distribution is a continuous probability distribution for a random…

Q: places A new sample of 130 freshmen is selected. Find the probability that less than 29% of the…

A: It is given that p = 27% = 0.27n = 130

Q: 8. A poll taken from a sample of 600 voters found that 58% say the United States spends too little…

A: Given thatSample size (n)=600Sample proportion p^=0.58We have to find a.90% confidence interval for…

Q: (a) What kind of test should be used? A. One-Tailed B. Two-Tailed OC. It does not matter. (b) The…

A: Let  be the population mean score on the final exam. Given that,Sample size Population mean…

Q: Determine whether the study depicts an observational study or an experiment. Twenty patients with…

A: In this case, the considered number of sampled patients is specified to have been divided into two…

Q: please need solution for part B 4.475 marked as wrong  and also where it says For this study, we…

A: The exam scores of sampled students, which are measured while taking the exam alone and in a…

Q: (a) Fit a model with just size of firm as independent variable (Modell). (b) Interpret the…

A: Since you have posted a question with multiple subparts, we will provide solution to the first three…

Q: If A and B are independent events with P(A) = 0.25 and P(B) = 0.40, then PLA | B)-. a. 0.25 Ob. 0.10…

A: It is given that P(A) = 0.25P(B) 0.40

Q: oncluded at the ax = 0.05 level of significance? me standar dev r this study, we should use Select…

A: Sample sizes n1=57 ,n2=57Sample means x1=27 , x2=31Population standard deviations 8 and 12Note:…

Q: Weights of 9 students (in lbs) before and after a month-long training schedule are given below. Test…

A: Let  be the difference in mean weight between after training and before training.Given that,No. of…

Q: 10 grams. If you pick one fruit at random, what is the probability that it will weigh between 655…

A: Mean = 676Std. deviation = 10

Q: (2) The joint p.d.f of the random variables X and Y is e-x-y, x>0, y > 0, { f(x, y)= 0, otherwise.…

A: Given,the joint pdf -..The mean of X, mean of Y, conditional expectation, and conditional variance…

Q: mean 2600 and standard deviation 50. (a) Is total energy needed during pregnancy a qualitative…

A: It is given that Mean = 2600Std. deviation = 50Note: According to Bartleby expert guidelines, we…

Q: Identify the mean, median and mode based from the data below. Please show complete solutions and…

A: Given data: Cholesterol (xi)No. of obs. (fi)fi*xiCumulative frequency…