(d) Find a 99% confidence interval and conclude.

Q: If n = 340 and p^=0.92, find the margin of error at a 90% confidence level E= Give your answer to…

A: Given,n=340p^=0.921-p^=1-0.92=0.08α=1-0.90=0.1α2=0.05Z0.05=1.645

Q: Use the confidence interval to find the margin of error and the sample mean. (1.52,2.06)

A: Given: Confidence interval is (1.52, 2.06) To determine: The margin error and The sample mean.…

Q: Use the confidence interval to find the margin of error and the sample mean. (1.71, 1.99)

A: Solution:  Given data: confidence Interval = (1.71, 1.99) To find: 1.Margin of error 2. Sample mean…

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: In order to construct the 95% confidence interval, you choose which formu x ±1.96 × n x + 1.984 × x…

A:

Q: Use a t table to find the value of t to use in a confidence interval?

A: Note: you did not mention the information about the sample, for which t-value is to be obtained. So,…

Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: In a recent survey of 750 people, 600 people claimed to watch football.  Construct a 95% confidence…

A: Solution: 9. Let X be the number of people who watch football and n be the sample number of people…

Q: 7. A recent study of 750 Internet users in Europe found that 35% of Internet users were women. What…

A:

Q: Use the confidence interval to find the margin of error and the sample mean. (.228, 0.390)

A: We know that the Margin of error = (upper_limit - lower_imit )/2 and Sample mean = (upper limit +…

Q: In order to construct the 95% confidence interval, you choose which formula? O x ±1.645 × OT ±1.96 x…

A:

Q: Political survey- A political analyst found that 43% of 300 randomly seleted republican voters feel…

A: It is given that p hat is 0.43 and sample size is 300. The confidence level is 0.95.

Q: If n = 200 and p^ = 0.64, find the margin of error at a 95% confidence level.

A:

Q: The. Nielsen television ratings used a random sample of 2,000 homes and found that 45% of the homes…

A:

Q: Illustrate the formula for the confidence interval?

A: confidence interval is defined as a range of values so defined that there is a specified probability…

Q: margin of error for a 95% confidence interval is approximately 2 times the standard error.  True…

A: The standard error can be calculated as: SE=σnorSE=sn Here, σ  or s = Standard deviation n = Sample…

Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: How do you find the confidence interval for a population mean?

A:

Q: In a sample of 300 people, 154 said that they watched news on television. Find the 90% confidence…

A: According to the given information in this question We need to find the 90% confidence interval of…

Q: The principal of a school claims that 30% of grade 3 pupils stay in the playground after their…

A: Proportion is almost similar to the concept of probability. Proportion is a fraction of population…

Q: If α = 0.05, then what is the confidence level?

A: Given: α = 0.05   we know that, Confidence level+ α = 1

Q: Find the confidence level and α for a. an 85% confidence interval. b. a 95% confidence interval.

A:

Q: If a student provided 90% confidence intervals in all ten questions, how many points would we expect…

A: In the given analysis, we have 10 questions and their correct answers. 10 sample responses from 10…

Q: In order to make the decision for one business, your team constructed a 90% confidence interval, the…

A: For 90% confidence interval, the width of that confidence interval is 500.We have to reduce the…

Q: What happens to the margin of error if you increase the confidence level?

A: We know that, Margin of error=zσn

Q: Use the confidence interval to find the margin of error and the sample mean.   (0.342, 0.460) The…

A: Here we have given confidence interval to find the margin of error and the sample mean.  As (0.342,…

Q: If the candidate only wants a 6% margin of error at a 99% confidence lev

A: Given that, The margin of error (E) is 0.06. Assume that p as 0.5.

Q: The 90% confidence interval for the population proportion p is (,) The 95% confidence interval for…

A: here n = 634 p^ = proportion of males gone to dentist pin past year = 390634 = 0.6151 z-critical for…

Q: the sample proportion of females is  x=118  n=164 P = .720  #1 Make a 95% confidence interval for…

A:

Q: In a previous election, the confidence interval for the proportion of likely voters who would vote…

A: given;confidence interval for the proportion;(0.4401, 0.5199)i.e. (p^-E, p^+E)where  p^ : point…

Q: If n=200 and ˆpp^ (p-hat) =0.39, find the margin of error at a 99% confidence level

A: Find z-critical value:…

Q: d. Construct a 95% confidence interval estimate. How does this change your answer to part (b)?

A: Given that Sample size n = 50 Sample mean = 0.987 Population SD = 0.02 The critical value of Z at…

Q: (d) Develop a 95% confidence interval for this population proportion. (Round your answer to four…

A: The point estimate of proportion of respondent who lack confidence they will be able to afford…

Q: A 95% confidence interval is narrower than a 90% confidence interval for the same data set. O True O…

A: We have to find given probability.

Q: A proportion, p, that many public opinion polls estimate is the number of Americans who would say…

A:

Q: Which of the common confidence levels (90%, 95%, or 99%) would you prefer to use if you wanted to…

A: Introduction: The “smallest” confidence interval implies the confidence interval with the shortest…

Q: Use the confidence interval to find the margin of error and the sample mean. (1.59,1.89)

A: Given data,Lower limit=1.59Upper limit=1.89Margin of error=?

Q: Using the t-table, give the confidence coefficient.   n=12 , CL = 95%

A: Given,   Sample size = 12 Confidence level = 95%   The objective is to find the confidence…

Q: Briefly describe the relationship between confidence interval and hypothesis testing.

A: Briefly describe the relationship between confidence interval and hypothesis testing.   A 95% CI…

Q: 3. Aresearcher wants to estimate the daily expenses of college students. He wants a 99% confidence…

A:

Q: Use the confidence interval to find the margin of error and the sample mean. (0.456,0.620)

A: The confidence interval is given by (0.456, 0.620) Let M denote the sample mean, And E denote the…

Q: Translate the statement into a confidence interval. Approximate the level of confidence.

A:

Q: Find the sample size need to find the Population Proportion if the margin of error is 4%, the…

A:

Q: Find the confidence level and α for a. a 90% confidence interval. b. a 99% confidence interval.

A:

Q: You work for a consumer advocate agency and want to find the mean repair cost of a washing machine.…

A: Given: n=29, x=100 and σ=17.5 Now, use the t-test to find the confidence intervals.

Q: Political Survey- A political analyst found that 43% of 300 randomly selected republican voters feel…

A: It is given that p hat is 0.43 and sample size (n) is 300. The confidence level is 0.95.

Q: The 99% confidence interval for the proportion of college students that prefer to work for a large…

A: We have given that that prefer to work for a large company is Sample size n =1500 Sample proportion…

Q: What is the center of a confidence interval? A)µ   B)s   C)x̄   D)σ

A: Center of a confidence interval is the sample statistic. Such as sample mean or sample proportion.

Q: 1(b). At 99% confidence, what is the margin of error?

A: here use given data table

Q: Identify the t-score for a 99% confidence interval if the sample size is 70. t = The answer isnt…

A: