what size sample should be obtained if the estimate is to be within 0.01 with a 95% confidence if my previous estimate of 0.32 ? And if I didn't use any previous estimates

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A: It is given that margin of error (E) is 0.02 and the confidence level is 95%.

Q: Suppose when will like to construct a 98% confidence interval for a sample mean when the population…

A:

Q: If the margin of error obtained from confidence level 99% is 0.12 and the statistic ˆp= 0.65, then…

A: Solution: From the given information, p-hat=0.65 and the margin of error is 0.12.

Q: if x x = 82, s = 3 and n = 36, give the lower confidence limit and the upper confidence limit, for a…

A: The upper limit of the confidence interval can be calculated using the formula: CIupper=x+zα·sn,…

Q: Suppose when will like to construct a 95% confidence interval for a sample mean when the population…

A:

Q: 9. Approximately what is the actual standardized effect size, d, for the mean differences between…

A:

Q: A confidence interval is desired for the true mean stray-load loss (Watts) for a certain type of…

A: Solution: Given information: n= 25 sample size  x = 53.6 Sample mean σ= 3.3 Population standard…

Q: Each of the following is a confidence interval for u = true average (i.e., population mean)…

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Q: university sample in order to build 95% confident that its estimated cost of the textbooks will…

A: Given : Margin of error,  ME = 25 maximum number = 750 minimum number = 250

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A: The given margin of error is 0.02 and confidence level is 99%.

Q: A random sample of n = 45 observations from a quantitative population produced a mean  x = 2.9  and…

A: From the provided information, Sample size (n) = 45 Sample mean (x̄) = 2.9 Sample standard deviation…

Q: The mean diastolic blood pressure for a random sample of 70people was 86 millimeters of mercury. If…

A: Given data: Mean = 86 Standard deviation  = 11 Sample size  = 70 Confidence level  = 90 %

Q: A random sample of 25 Items Is drawn from a population whose standard devlation Is unknown. The…

A: Solution: Given information: n= 25 Sample size  x=830 Sample mean s= 5 Sample standard deviations

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A:

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A:

Q: You would like to construct a 95% confidence interval to estimate the population mean time it takes…

A: The best point estimate for the population mean is the sample mean. In this case, the sample mean is…

Q: Thirty small communities in Connecticut (population near 10,000 each) gave an average of x = 139.3…

A: (a) Obtain the 90% confidence interval for the population mean annual number of reported larceny…

Q: A random sample of size 20 is drawn from a normally distributed population with an unknown mean and…

A: From the provided information, Sample size (n) = 20 Standard deviation (σ) = 20 Mean (x̅) = 50…

Q: A survey of 200 Senior High School learners shows that they read on average 18.5 hours per week with…

A: Given Data Sample size= 200 Samle mean =18.5 Margin of error =2.2 95%ci,lower limit =?

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 300…

A: According to the given information, we have 300 adult residents sampled, 195 had kids. 90%…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A:

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 200…

A: Critical value: Using excel formula “=NORM.S.INV(1-(0.01/2))”, the critical value for 99% confidence…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: The random variable is adults who have​ high-speed Internet access. It follows standard normal…

Q: For a data set obtained from a sample, n = 100 and x = 46.25. It is known that o = 4.8. (a) What is…

A: It is given that  n = 100  x¯ = 46.25 σ = 4.8

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 200…

A: Given, successes (x)  = 114 sample size (n) =200 confidence level = 90%

Q: The mean diastolic blood pressure for a random sample of 100 people was 87 millimeters of mercury.…

A: The random variable is the diastolic blood pressure. The sample size is 100. The sample mean is 87…

Q: (d) Assume that a certain dimension is measured on four successive items coming of a production…

A: Solution: Given data: X- bar = 2.384 S = 0.7 Maximum margin of error = ±0.45 97 % = two sided…

Q: Suppose that a random sample of 15 adults has a mean score of 70 on a standardized personality test,…

A: given n=15, sample mean=xbar=70 and sample sd=s=8 the when sigma unknown

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 500…

A: According to the given information, we have Total number of adult residents sampled = 500 350 had…

Q: searcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What size…

A: At a 95% confidence level, the z value is 1.96. Now, the required sample size can be calculated as:…

Q: There is a new drug that reduces the body’s production of new blood vessels, thus starving the…

A: Given data: Margin of error = 0.03 Confidence level   = 95% n = 23 x = 17

Q: The column labeled “b” in Table 1 shows the slope for each of the allometric relationships between…

A: The given output is displayed below.

Q: If n = 300 and ˆpp^ (p-hat) = 0.9, construct a 95% confidence interval. Give your answers to three…

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Q: 25. A sample of 1000 observations taken from the first population gave X1 = 280. Another sample of…

A: Given n1=1000x1=280n2=1200x2=396

Q: The scores for a certain standardized test have a population mean of μ=285 with a population…

A:

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 600…

A: Sample size : n=600 Number of successes : x=432 Confidence level : 1-α=0.95

Q: In my last question, the formular for a & b is correct, however, the same formular for c is…

A:

Q: Thirty small communities in Connecticut (population near 10,000 each) gave an average of x = 139.0…

A: Since we know population standard deviation, use z-distribution to find z-critical value.…

Q: A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What…

A: Given: Margin of error E = 0.04 Confidence level = 90% Significance level α = 0.10 Formula Used: n =…

Q: Suppose a marketing company randomly surveyed 259 households and found that in 150 of them, the…

A: Households randomly surveyed Of which  woman made the majority of the purchasing…

Q: We wish to estimate what percent of adult residents in a certain county are parents. Out of 100…

A: We have given that,  Favorable cases (X) = 84, sample size (n) = 100 Then,  We will find 99%…

Q: IF n < 30 AND T = SHOW HOW THE 100(1-2a) % CONFIDENCE INTERVAL FOR IS DERIVED

A: If the sample size is less than 30 and the sample standard deviation is not known, one sample t-test…

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.