You have a population of 100 engineering students at a certain university and you want to interview only a sample to see if they agree that the average ticket for graduation costs $ 3,000. What should be the minimum sample size that meets a standard error of 0.05 and a reliability of 95%?

Q: Suppose that you take 1000 simple random samples from a population and​ that, for each​ sample, you…

A:

Q: For a two-tailed test at 99% confidence based on a sample of size 20 with unknown population…

A: Confidence interval is a range of values it contains the true population parameter with specified…

Q: If n=400 and X=100​, construct a 95​% confidence interval estimate for the population proportion.

A: Given,x=100n=400sample…

Q: If we want to provide a 95% confidence interval for the mean of a population when the population…

A:

Q: If X = 114, α= 20, and n = 33, construct a 99% confidence interval estimate for the population mean,…

A: Given data:  Sample Mean = 114 Population standard deviation = 20 Sample size = 33 Confidence level…

Q: We want to estimate a population proportion with a 95% confidence interval and we want the margin of…

A:

Q: Suppose x has a mound-shaped distribution with σ =4. Find the minimal sample size required so that…

A: Givenstandard deviation(σ)=4Margin of error(E)=0.5confidence interval=90%

Q: In each of Exercises, we have given a likely range for the observed value of a sample proportion p.…

A:

Q: If the critical value of t is 2.303, and the sample size is 13. Find the significance level (a).

A: we want to find value of alpha

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: For a two-talled test at 86.12% conndence with known population variance, the critical value of the…

A: Solution : Given : Confidence level = 86.12% and population variance is known. When population…

Q: Dylan wants to determine a 95% confidence interval for the true proportion of high school students…

A:

Q: In practice, if we don’t know whether the population is normal and our sample size is less than 30,…

A: If we don't know whether the population is normal. In this case we can check it easily by two…

Q: A statistical research yields to the sample proportion of a certain feature in a certain community…

A: It is given that  Proportion, p = 0.56 Margin of error, ME = 0.05 Confidence interval = 90%

Q: (c) How large would the sample need to be so that a 95% confidence interval would have a margin of…

A: Given that sample mean xbar=12.05 and population standard deviation=6.55 3) find sample size of…

Q: Find the minimum sample size you should use to assure that your estimate of p will be within a…

A: We have to find sample size required.

Q: 1) a) You feel safe using an estimate for p of .13 Find the sample size needed if a 98% confidence…

A: Comments: As per the our company guidelines we are supposed to answer only one question. Kindly…

Q: For a two-tailed test at 99% confidence based on a sample of size 20 with unknown population…

A: For 99% confidence level we have to find the critical value.

Q: Suppose you survey a random sample from a large population to understand the population proportion.…

A: Given information- Margin of error, E = 6% = 0.06 Confidence level, c = 98% Since nothing is known…

Q: For a population with µ = 40 and σ = 8, what is the z-score corresponding to X = 34?

A: Given  µ = 40 and σ = 8 , X=34

Q: A marketing researcher for a phone company conducteda survey of 500 people and then constructed a…

A: Given: Survey of 500 people has been conducted to know the proportion of customers that are likely…

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: We want to estimate, with a maximum error of .02, the true proportion of all senior medical students…

A: compute sample size ( n ) = n=(Z/E)^2*p*(1-p)

Q: Beth wants to determine a 95 percent confidence interval for the true proportion p of high school…

A: Here we need to find the required sample size inorder to construct a 95% confidence interval for the…

Q: Example 11.7 A firm manufacturing steel furniture desires to estimate the proportion of the…

A:

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 29, x¯ = 46, and s =…

A: From the provided information, Sample size (n) = 29 Sample mean (x̅) = 46 Sample standard deviation…

Q: Given your decision, what type of error could you be making? Use data from Experiment 1 to answer…

A: STM capacity has, population mean , m = 7 items and population sd, s = 2 items.  A random sample of…

Q: If you were constructing a 99% confidence interval of the population mean based on a sample of n =…

A:

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 19, x¯ = 43, and s = 3,…

A:

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

A:

Q: Dylan wants to determine a 99 percent confidence interval for the true proportion p of high school…

A:

Q: A larger difference between two sample means will increase BOTH - the likelihood that an…

A: Because the numerator of the t test statistic is the difference in means, and the same is true for…

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: It is known that the population variance (σ2) is 125. At 95% confidence, what sample size should be…

A: Given information- Population variance (σ2) is 125 Confidence interval = 0.95 Significance level (α)…

Q: 1. Find the minimum sample size (n) you use to so that p is within a margin of error of 3% with a…

A: Sample size = sample size is the number of completed responses your survey receives or (randomly…

Q: A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: We have given 90% confidence interval for proportion then we have to find the sample size for the…

Q: In each of Problems, we have provided a scenario for a confidence interval. Decide, in each case,…

A: It is given that the boxplots of the reveals no outliers. That is, it can be assumed to be…

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

A:

Q: If X=68​, σ=14​, and n=66​, construct a 95​% confidence interval estimate of the population​ mean, μ

A:

Q: what sample size should a researcher take if he wants to estimate a population proportion to be 2%…

A: From the given information,   Margin error = 0.02 Assume sample proportion = 0.5   Critical value:…

Q: A research center claims that 30​% of adults in a certain country would travel into space on a…

A: One sample proportion test is used to compare the proportion of values in given sample of data to…

Q: For a population of σ = 16, how large a sample is necessary to have a standard error that is a. less…

A: Obtain the large sample that is necessary to have a standard error that is less than 8 points. The…

Q: Refer to the following scenario. A government official is in charge of allocating social programs…

A:

Q: Beth wants to determine a 99% confidence interval for the true proportion of high school students in…

A: Suppose p is the true proportion of high school students in that area who attend their home…

Q: a) Find a 90% confidence interval estimate for the mean college football score if a sample of 100…

A: a) Given data, σ=6n=100x=46z-value at 90% confidence is Zc=1.645

Q: Set up the null and alternate hypotheses to test whether the population mean is equal to 10 when you…

A: The Null hypothesis is  Ho: μ=10

Q: If you wish to estimate a population mean with a sampling distribution error SE = 0.21 using a 95%…

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.