It is desired to know the true proportion of divers who get "the bends" (sickness from nitrogen in the blood). If we wanted to be 92% confident that the maximum margin of error is 0.04, how large a sample is needed if a previous study found that 21% of divers suffered from "the bends"? O 320 divers 317 divers 319 divers 318 divers

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and area. She will…

A: The smapleproprotion is caculated as: p = x/n=36/330 =0.1091   At a 95% confidence level, the z…

Q: A sample of n = 4 scores has a mean of x̅ = 40, with a sum of squares of SS = 48. What is the…

A: Given that n=4, x̅ = 40 and SS=48 Consider, the variance, s2=SSn-1=484-1=16

Q: a. Assume that nothing is known about the percentage to be estimated. (Round up to the nearest…

A: a) If nothing is known about percentage to be estimated,  We will have a conservative estimate for…

Q: A recent study indicated that 20% of 133 women over age 55 in the study were widows.  a. How large a…

A:

Q: A recent poll of 800 people who work indoors found that 208 of them smoke. If the researchers wnat…

A: The sample proportion can be calculated as: p=x/n=208/800=0.26 At a 98% confidence level, the z…

Q: A stratified sample of size n = 60 is to be taken from a population of size N = 4000, which consists…

A:

Q: A random sample of 120 adults showed that 42 are already fully vaccinated. What is the best point…

A: Given X:The no.of adults fully vaccinated X=42 n:Sample Size  n=120 We have to find best point…

Q: A population with a mean of u = 8 has EX = 40. How many scores are in the population?

A: It is given that the mean is 8 and sum of X is 40.

Q: For a population with u = 30 and a = 4. Find the z-score that corresponds to an X value of 34.

A: From the provided information, Mean (µ) = 30 Standard deviation (σ) = 4 X~N (30, 4)

Q: On average, what value is expected for the F-ratio if the null hypothesis is true? a.           0…

A: The null hypothesis is there is no treatment effects.

Q: chi-square test for goodness of fit has df = 4. How many categories were used to classify the…

A: Given that ; chi-square test for goodness of fit has df = 4. By using the concept of chi- square…

Q: A sample with M=8 has EX=56. How many scores are in the sample?

A:

Q: If the the true value = 11.5140 and the true Error = -0.1822 then the Relative True Percentage…

A: This is a problem of Numerical Analysis.

Q: псе pec against loss of both eyes in a car acciden Based on previous data, the rates were computed…

A: Given: n=4000 p=10100000=0.0001

Q: Diastolic blood pressure in adults is normally distributed with m = 80 mm Hg and s = 12 mm Hg. In a…

A: The probability that diastolic blood pressure below 70 mm Hg is,

Q: Given A = 13.2 and B = 3.56, which both are corrected to 3 significant figures. Find the range of…

A: Given Information:     A=13.2B=3.56 Consider the given function:    6A-B3+8

Q: What percentage of scores is between a z of ‐2 and a z of +2? Why is this important?

A: Use Empirical rule to solve it

Q: A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the…

A: A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the…

Q: A chi-square test for goodness of fit has df = 2. How many categories were used to classify the…

A: Identify the correct option for the number categories that used to classify the individuals in the…

Q: find out the margin of error for   for given data  [ 4 decimal places ] s=25.35 xbar - 231 n=96…

A:

Q: A researcher reports an F-ratio with df = 1, 24 for an independent-measures experiment. If all the…

A:

Q: If the z-score for a motel is 0.7, what is the price of a single room at the motel (in dollars)?

A: The formula for z score is, z=x-μσn In the formula, x is the individual score, μ is the mean, σ is…

Q: S For n= 15, the margin of error for an estimate at an alpha level of 2% is +2.249 15

A:

Q: A population of N = 6 scores has EX 48. What is the population mean? %3D O 12 48 288

A:

Q: DA simple sample of heights of 6400 English men has a meal of 170cm and a S.D. of 6.4 cm, while a…

A: Note: We'll answer the first question since the exact one was not specified. Please submit a new…

Q: The z score length of a carrot is 1.5, what is the length of this carrot?  what percentage of…

A: We have to find  the percentage of carrots....

Q: Q12) The distribution of the humber of imperfections per 10 meters of synthetic fabric is given by…

A: Correct answer is  0.1538

Q: If your study consists of four groups, each with 15 subjects, and SSpet = 42 and SSw = 35, what does…

A: Number of groups, k = 4 Number of observations, N = 60 SSbet = 42 and SSw = 35

Q: (a) What percent of the SAT verbal scores are less than 650? (b) If 1000 SAT verbal scores are…

A: Given: μ=515, σ=110 The corresponding z-value needed to be computed: The probability that s scores…

Q: In a population with o = 8, a score of X = 44 corresponds to a z-score of z= -0.50. What is the…

A: Here, standard deviation is 8, X = 44, and z = –0.50.

Q: Previous > Next QUESTION 23 You have been assigned to determine whether more people prefer Coke to…

A: Margin of error (E) = 3% = 0.03Significance level (α) = 1 - 0.95 = 0.05

Q: Is IQ related to GPA?If a student’s IQ is 117, what GPA would you predict?How much of the variation…

A: Given Info :  The provided data are from a random sample of thirty cases from a study by Howell…

Q: A company specializing in building robots that clean your house has found that the average amount of…

A:

Q: For a sample of 12 offenders convicted of weapons violations, the length of prison sentence in…

A: to find mean valuemean = sum of observations/ count of observationsmean = (6 + 6 + 2 + 12 + 36 + 48…

Q: The weights of radish seeds are normally distributed, with µ = 0.12 g and σ = 0.02 g.    -What is…

A: Given data, µ = 0.12 g σ = 0.02 g

Q: If a constant c is added to each xi in a sample, yielding y; = x; + c, how do the sample mean and…

A: Note:-Since you have asked multiple questions, we will solve the first question for you. If you want…

Q: For a sample of 12 offenders convicted of weapons violations, the length of prison sentence in…

A: to find mean valuemean = sum of observations/ count of observationsmean = (6 + 6 + 2 + 12 + 36 + 48…

Q: the brand manager for a toothpaste brand must plan a campaign designed to increase brand…

A: The error is ±1.96×p1-pn=0.05assume p=0.5. This will give the most conservative estimate square on…

Q: For a population with µ = 40 and σ = 8, what is the X value corresponding to z = 1.50?

A: It is given that the mean is 40 and the standard deviation is 8.

Q: How large a sample must she select if she desires to be 98% confident that the true mean is within 4…

A: HERE GIVEN , population standard deviation  = 6 ounces  confidence level = 98%  MOE  = 4

Q: Find the relative error of p = 0.71 × 10-5 if its approximate value is p* = 0.70 × 10-5, and also…

A:

Q: A population with a mean of u = 8 has EX 40. How many scores are in the population?

A: From the provided information, Mean (µ) = 8 ∑X = 40

Q: When X; only takes two values {0, 1}, what are the possible values of the estimates of p?

A: Solution : Given that , X1,X2,...........Xn be a random sample from population.Considering…

Q: When estimating the population proportion, how large a sample is needed to be 95% confident that the…

A: Here  sample proportion = 42/120= 0.35

Q: A company specializing in building robots that clean your house has found that the average amount of…

A: Let A= average value E=marginal error B=correct value So, the range of B is: A-E≤B≤A+E

Q: A population with a mean of u = 8 has EX = 40. How many scores are in the population? %3D

A: Given information- Mean, µ = 8 ⅀X = 40 We have to find how many scores are in the population. Let, N…

Q: The distribution of the weights of a sample of 1,400 cargo containers is symmetric and bell-shaped.…

A:

Q: A recent study in 2013 conducted in Canada showed that house values were reduced in value by an…

A:

Q: What percent of our campus is female? If no preliminary study is made to estimate, how large a…

A: Given that no preliminary sample is taken to estimate the proportion of females. let the sample size…

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.