A production line in a factory, assembles laptops. A random sample of assembly time of 49 laptops has been drawn from this factory. Suppose, the population distribution haso moan nssembly time off 20 minutes and

Q: A company uses a computer to identify 600 most loyal customers from his database then service those…

A: A company uses a computer to identify 600 most loyal customers from his database then service those…

Q: A sample of n=16 is selected from a population = 100 and σ= 32. If the sample mean is 127, what is…

A: z-score for sample mean: From the given information,   n=16 µ=100 σ=32 x-bar=127   Therefore,

Q: Suppose that in a large class at a major university, the instructor announces that the average grade…

A: Given information- We have given the average grade on an exam = 72 Since we know that from the…

Q: A company that manufacturers wooden products (e.g. garden furniture, ladders, benches) regularly…

A: Hi, thanks for posting the question. The question contains more than three subparts, I am able to…

Q: Suppose that 40% of all people in a certain population have brown hair. If a random sample of 100…

A:

Q: Hello, How do you set up and solve? Thank You!

A: Variance of the sampling distribution of the proportions:Consider p-hat as the sample proportion and…

Q: Suppose Diana, an educational researcher at a local university, wants to test the impact of a new…

A: Diana selects a simple random sample of 68 freshmen and divides them into 34 pairs. we have given,…

Q: Researchers at Purdue University and Wichita State University found that airlines are doing a better…

A: From the given information, a) The hypotheses that can be used to test for a difference between…

Q: The following table includes the 9 possible combinations of choosing two numbers, with replacement,…

A: Given all sample combinations possible of size two drawn with replacement from a population having 3…

Q: A sociologist wants to know the proportion of adults with children under the age of 18 that eat…

A:

Q: Suppose that three drugs used to reduce cholesterol are compared in a randomized experiment in which…

A: Excel Procedure: Enter the data for 1, 2, 3 in Excel sheet>Go to Data Menu>Click on Data…

Q: A factory for the production of light bulbs took a random sample of 200 units and found that 18 of…

A: The sample size is N=200N = 200 the number of defective cases is X=18X = 18 and the sample…

Q: a. Out of a random sample of 74 birds, how.many would you expect to live longer than 9 years? b.…

A: Let X = number of years a bird lives.  Then, X ~ Exponential (0.125) Thus,  f(x) = 0.125e-0.125x .

Q: Have you ever opened a bag of M&Ms and been surprised at the distribution of colors? We are going to…

A: Given information: Color Brown Red Yellow Orange Green Blue   Count 14 11 10 37 11 19 102…

Q: Find the probability that mean of sample size 36 will be negative.

A:

Q: One sample with n=4 scores has a mean of 12, and a second sample with n=6 scores has a mean of 8.…

A: Given information Sample 1 n1 = 4, µ1= 12 Sample 2 n2 = 6, µ2= 8

Q: Below is the summary table of the duration of long-distance calls repoP 15.2 minutes Population mean…

A:

Q: The secretary in a statistics department would like to estimate how much coffee to brew per day such…

A: Solution-: Given data:  3, 4, 4, 6, 4, 6, 5, 2, 5, 3 We want to find, (a) The sample mean=? (b) The…

Q: Two samples are randomly selected from

A: Failing to reject the Null hypothesis means accepting it and rejecting the alternative hypothesis.

Q: Suppose that we will randomly select a sample of n= 94 elements from a population and that we will…

A: From the given information, n=94 and p=0.8 n(1-p)=941-0.8              =18.8

Q: A study shows that 80% of students in a school love to listen to music while studying, with a…

A: Given : A study shows that 80% of students in a school love to listen to music while studying, with…

Q: Table Q4 shows the numbers of mistakes made in five successive days for 4 technicians working at a…

A: The following information has been provided:   Technician 1 Technician 2 Technician 3 Technician…

Q: Suppose multiple samples of size nn are drawn from a population with a mean of 50. The mean is…

A: Population mean =50

Q: Assume that 26% of students at a university wear glasses. Suppose 300 students are randomly…

A: It is given that Sample size n = 300 Population proportion p = 0.26

Q: A doctor believes that 80% of all patients having a particular disease will be fully recovered…

A: From the provided information, A doctor believes that 80% of all patients having a particular…

Q: To study the mean blood pressure of all people in her state, Christine samples the population by…

A:

Q: Suppose in a random sample of 152 individuals, 25 are considered success. Compute the sample…

A: Given data suppose in a random sample of 152 individuals  25 are considered success

Q: 1 out of every 10 fish have blue on them. If you were to take a random sample of 60 fish, what is…

A: Let X denote the number of blue fish out of n = 60 fish. Let p denote the probability of getting…

Q: Blank are more representative of a population, but blank are easier to obtain

A: The sample is a set of units that is obtained from a population, which represents the population.…

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: 4. Out of 450 randomly selected people in a soccer match, 225 of them were students. Compute the…

A: 450 people are selected randomly; n=450 225 of them were students; x=225

Q: Suppose Kathy bought a large bag of candy that comes in 4 flavors: cherry, strawberry, orange, and…

A: Consider that pi’s are the proportion of the candies, that are cherry, strawberry, orange and lemon…

Q: An automotive manufacturer wants to know the proportion of new car buyers who pref foreign cars over…

A: A sample of 897 cars; n=897 304 preferred domestic cars; x=304 α=0.05

Q: The CEO of an airline estimates that 15% of all flights arrive late. How many flights must he…

A: Given Information: Proportion p=0.15 Confidence level = 96% = 0.96 Significance level α=1-0.96=0.04…

Q: A sample of n = 64 scores is selected from a population with µ = 80 and with σ = 24. On average, how…

A: Givenn=64μ=80σ=24

Q: A record store owner finds that 15,0% of customers entering her store make a purchase. One morning…

A: Given,n = 188P = 0.15SE = ?

Q: A simple random sample of 100 high school students who took the AP exam in statistics is taken from…

A: Solution:- from given information Null hypothesis H0:p1=0.4,p2=0.25,p3=0.23,p4=0.12Alternate…

Q: A government agency computed the proportion of U.S. residents who lived in each of four geographic…

A: Claim : The proportions of people living in the various regions changed between the current year and…

Q: A company is started by four friends. The company was Erica’s idea, so she wants to fill 70% of the…

A: Chi-square test- The use of this test is to check how likely the observed frequency will be if we…

Q: In a large school district, all teachers from two buildings are interviewed to determine whether…

A: We know that, in cluster sampling method, we divide all population into clusters such that, within…

Q: rcher asked a random sample of students at the library on a Friday night, “How many hours a week do…

A: If the selected sample or data for analysis is selected in such a way that randomization is not…

Q: The reason why samples are selected at random is

A: We know that  Random sampling :  Selecting a sample randomly from the population . By selecting…

Q: . Suppose the proportion of American adults who work at home is 40%. For a random sample of 100…

A: Solution-: Given: n=100, P=0.40 (Population proportion) Let, p^- be the sample proportion

Q: Suppose in a random sample of 61 individuals, 28 are considered success. Compute the sample…

A: Given x=28 n=61

Q: Calculate the variance of a sample for which n=5, sigmax^2=1320, sigmax=80

A: Given data n=5∑x2=1320∑x=80

Q: From a population of 300 you are going to select 50. Using the systematic sampling technique where 5…

A:

Q: We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of return.…

A: Given :  We would like to know if Intel’s stock and Southwest Airlines’ stock have similar rates of…

Q: In an activity, students are pulling marbles from a large jar containing blue and red marbles. In…

A: We need to identify suitable sample size

Q: Suppose in a random sample of 81 individuals, 35 are considered success. Compute the sample…

A: Given x=35 n=81

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.