It is desired to determine what percentage of young men in a city regularly exercise. For this purpose, a sample of 4000 young men was randomly selected, of which 1200 appears to be exercising regularly. Since the standard error of the sample rate is 0.007, we can determine the confidence limits of the proportion of those who do sports regularly in the population with 99% probability.

Q: It is desired to determine what percentage of young men in a city regularly exercise. For this…

A: From the provided information, Sample size (n) = 4000 Out of which 1200 appears to be exercising…

Q: The formula P %3D n + 4 is describing the [Select ] method for calculating an approximate confidence…

A: Solution: X=no of successes  n=no of experiments  To find approximate confidence interval for a…

Q: When constructing a confidence interval for μwhen σis known, we assume that we have a simple random…

A: The standard deviation measures the distance between each data point and the mean. It measures the…

Q: 4. The World Health Organization reports that in a sample of 10,013 people globally, 9 in 31 people…

A: We know, we calculate CI for a single proportion with the formula z*=1.96 for 95%          1.645 for…

Q: The minimum sample size needed to construct a 95% confidence interval for u, with error not…

A: formula for the sample size needed to estimate a population mean is

Q: 3) A corporation employs 148 sales representatives. A random sample of 60 of them was taken, and it…

A: The sample proportion is computed as follows,

Q: In a sample of 225 college seniors, 189 responded positively when asked if they have spring fever.…

A: Obtain the 95% confidence interval for the proportion of all college seniors who have spring fever.…

Q: (b) What sample size should be obtained if he wants to be within 4 percentage points with 95%…

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: Suppose that the sample size had been​ 240, with x bar=4.1 and s=3.1. Use technology to find a​ 95%…

A: Sample mean = x̅ = 4.1 Sample size = n = 240 Sample S.D = s = 3.1 Standard Error = s/√n  =…

Q: eth wants to determine a 90 percent confidence interval for the true proportion of high school…

A:

Q: nd a 90% confidence interval for for the probability of success θ in a Bernoulli trial with n=48.

A: Confidence interval: It is defined as the range that contains the value of the true population…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: The National Weight Control Registry tries to mine secrets of success from people who lost at least…

A: Given - Sample size, n = 2720 Number of registrants on a low-carb diet,X = 439 Proportion of…

Q: 98% VaR that is acceptable in a 1-year backtest to conclude, at a 95% confidence level, that the…

A: The risk manager will reject the hypothesis that the model is correctly calibrated if the number X…

Q: It is desired to determine what percentage of young men in a city regularly exercise. For this…

A:

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: The random variable flu follows binomial distribution. X ~ B (n, p). The sample size is 337. The…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: If both the expected number of success and expected number of failures are greater or equal to 10,…

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: Given data isn=332x=36p^=xn=36332=0.108434Margin og error(E)=0.04Confidence level=95%

Q: Suppose that 100 samples of size n = 50 are independently chosen from the same population and that…

A: The confidence interval at 100 (1 – α) % confidence level gives us an interval estimate about the…

Q: The National Weight Control Registry tries to mine secrets of success from people who lost at least…

A: X: People on a low-carbohydrate diet. X=439 n=2720

Q: the data obtained from the sample of children. Of the following, which is the smallest sample size…

A: It is given that Population SD = 1.5 Margin of error E = 0.1 Level of confidence = 99% The critical…

Q: A two-tailed hypothesis test for H0: μ = 20 at α = .05 is analogous to asking if a 95 percent…

A: Given: Level of significance =  α = 0.05  A two-tailed hypothesis test for H0: μ = 20  against H1:…

Q: Suppose that you intend to find a 95% confidence interval for a population mean by applying the…

A: The z value at 95% confidence level from the standard normal table is 1.96.Let σ is the population…

Q: A soft-drink manufacturer purchases aluminum cans from an outside vendor. A random sample of 70 cans…

A: (a)   Obtain the 95% confidence interval for the proportion of cans in the shipment that meet the…

Q: The minimum sample size needed to construct a 95% confidence interval for u, with error not…

A:

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A: Proportion = p =40/334 = 0.119760479041916 Margin of Error = E = 0.04 Confidence Level = 95…

Q: Suppose that you wish to obtain a confidence interval for a population mean. Under the conditions…

A: Given The Pop. sd is unknown. The pop. is normally distributed. The sample size (n) is small.

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: an epidemiologist is womied about the prevalence of the flu in East Vancouver and the potential…

A: Given data, n=331 x=33 E=0.05 z-value at 95% confidence is Zc=1.960 n=?   p=x/n=33/331=0.0997

Q: Here are summary statistics for randomly selected weights of newborn​ girls: n=232, x…

A: Given information Sample size n = 232 x̅ = 27.4 hg s = 6.1 hg

Q: A random sample of 100 packs of apples with a professed weight of 1kg was found to have mear 1020g…

A: Consider X as the random variable that indicates the weight of an apple. The provided information is…

Q: In a previous study, it was found that p̂= .73 for a particular sample. Suppose we would like to…

A: Given information Error = 0.01 Confidence level = 0.98

Q: (b) Estimate the sample size needed if no estimate of p is available. A sample of 504 adults is…

A: Given that m.e=0.03,alpha=0.002 ( 2 ) n=?

Q: Suppose that in a random sample of 600 employed Americans, there are 49 individuals who say that…

A:

Q: A national opinion poll found that 44% of all American adults agree that parents should be given…

A: Given information Error = 3% = 0.03 Confidence level = 0.99

Q: Give the margin of error for the 90% confidence interval for µd = µ1 – H2

A: The differences are 4, 6, 2. The mean is, d¯=∑dn=4+6+23=123=4 The standard deviation is,…

Q: In exploring possible sites for a convenience store in a large neighborhood, the retail chain wants…

A: Solution  To find solution we will use conservative estimate of people.

Q: Suppose that in a random sample of 450 employed Americans, there are 45 individuals who say that…

A: Given that Sample size n=450 Favorable cases x =45 Sample proportion p^=x/n  =45/450 =0.1

Q: In exploring possible sites for a convenience store in a large neighbourhood, the retail chain wants…

A: Determine whether the given margin of error is appropriate if  the random sample of size n = 100…

Q: An epidemiologist with the Florida Department of Health needs to estimate the proportion of…

A: Given,sample proportion(p^)=0.951-p^=1-0.95=0.05margin of…

Q: in a study of government financial aid for college​ students, it becomes necessary to estimate the…

A:

Q: a researcher was interested in comparing the amount of time watching television by women and by men.…

A: Solution: Given information: n1= 14  Sample size of women n2=17  Sample size of men x1= 12.7 hours…

Q: A farmer wants to test the effectiveness of a pest control method in allowing strawberry blooms to…

A: Solution: Let X be the number of blooms that yield marketable strawberries and n be the sample…

Q: Based upon the results of the sample in #1, can you say with 95% confidence that your confidence…

A:

Q: A confidence interval is calculated after running a two-sample z-test for proportions, yielding the…

A: Givenconfidence interval is [0.01,0.14]Upper Limit = 0.14Lower limit = 0.01

Q: How large a sample should she take to achieve this? Please carry answers to at least six decimal…

A: Given: sample size, n=332 number of people have flu, x=36 Margin of error, E=0.03 confidence…

Q: suppose X has a mounded-shaped distribution with a standard deviation of O= 3. Find the minimal…

A:

Q: In the construction of confidence intervals, if all other quantities are unchanged, a increase in…

A: Given : sample size in increased

Q: A statistics student wants to conduct a study to determine the proportion of workers in Cititon who…

A:

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.