You want to obtain a sample to estimate a population mean age. Based on previous evidence, you believe the population standard deviation is approximately o = 2.3 years. You would like to be 95% confident that your estimate is within 0.75 years of the true population mean. What is the smallest sample size you can use? The smallest possible sample has members.

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

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

Q: A population has mean =22 and standard devlation G- 20. Find u- and G- for samples of size n=100.…

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: What sample size is needed to give a margin of error within ±3.5% in estimating a population…

A: Obtain the sample size of a preliminary estimate for p is 0.3 with the 99% confidence. The formula…

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

A: The standard deviation of the distribution of the population is given as: σ=66.3. The desired level…

Q: Thirty randomly selected students took the calculus final. If the sample mean was 74.2 and the…

A: From the provided information, Sample size (n) = 30 Sample mean (x̅) = 74.2 Standard deviation (s) =…

Q: Provide an appropriate response. A doctor at a local hospital is interested in estimating the birth…

A: The confidence level is 90%, margin of error is 2 and the standard deviation is 7.

Q: You want to estimate the percentage of small incorporated businesses that are owned by women. A…

A: The random variable percentage of small incorporated businesses follows binomial distribution. The…

Q: A population has a mean μ = 82 and a standard deviation = 24. Find the mean and standard deviation…

A: Given that the distribution is normal distribution. Mean = 82 Standard deviation = 24 Sample size =…

Q: a. Determine the sampling distribution of the sample mean for samples of size 64. The mean of the…

A: GivenMean(μ)=$51.5 thousand = $51500standard deviation(σ)=$7.6 thousand = $7600

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A: sample size n=?

Q: A population has a mean u= 71 and a standard deviation a= 27. Find the mean and standard deviation…

A: Central Limit Theorem for mean: If a random sample of size n is taken from a population having mean…

Q: Calculate the standard score (z-score) of the given sample mean. Round your answer to two decimal…

A: It is given that the mean is 18 and the standard deviation is 6.

Q: What sample size is needed to give a margin of error within ±3% in estimating a population…

A:

Q: You want to obtain a sample to estimate how much parents spend on their kids birthday parties. Based…

A: Givenstandard deviation(σ)=79.3Margin of error(E)=1.5confidence level=98%

Q: A statistics professor surveys all 100 of the students in an introductory statistics lecture. The…

A: In this context, it that the professor conducts the survey on all 100 students in an introductory…

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

Q: d. Determine the sample standard deviation. Round your answer to 2 decimal places. e. Determine the…

A: The data set are :- X :- 29.6 32.4 38.7 42.4 44.5 46.4 49.0 60.8 70.2 Then,  We will find sample…

Q: The proportion of adult women in a certain geographical region is approximately 51%. A marketing…

A: Find the proportion of sample of 200 that are expected to be women:Here, it is given that,…

Q: You plan to take a random sample from a population of 500 items and build a 95% confidence interval…

A: The given data is as follows:Population size, Margin of error, Population standard deviation,

Q: The next five questions refer to the following scenario: • sample mean x = 10 • sample sizen = 100…

A: The random variable X follows normal distribution. We have to write the form of the confidence…

Q: estimate is within 3 of the true population mean. How large of a sample size is required? Round up…

A: Given that, Population standard deviation (σ) = 74.3 Margin of error (E) = 3 Confidence level (C) =…

Q: We want to obtain a sample to estimate a population mean. Based on previous evidence, researchers…

A: standard deviation()=76.5Margin of error(E)=2.5confidence level=90%

Q: You want to obtain a sample to estimate a population proportion. At this point in time, you have no…

A:

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

A: Given  σ=79.8, level of significance=ɑ=0.05, Margin of error=moe=5  n=?

Q: What sample size is needed to give a margin of error within +2.5% in estimating a population…

A:

Q: A population has a mean p = 84 and a standard deviation o = 9. Find the mean and standard deviation…

A: Determine the sampling distribution of the sample mean for sample of size 81. The sampling…