Find the confidence level and a for an 88% confidence interval.

Q: For a 95% confidence level, the value of zą is: a) b) c) 1.96 1.645 2.33

A: 21.

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: Construct a confidence interval for the population proportion p sample size, n=256,success number,…

A: Here, n=256, x=130.

Q: Use the sample data and confidence level given below to complete parts  (c).   A research institute…

A: It is given that, the number of respondents said yes (x) is 587 and the sample size (n) is 912.  The…

Q: Which of the following is TRUE if you choose a 95% level of confidence?

A: HERE AS PER POLICY I HAVE CALCULATED FIRST MAIN QUESTION PLZ REPOST FOR REMAING

Q: Increasing the sample size will widen the confidence interval of the population proportion p O True…

A: We have given that,  Increasing the sample size will widen the confidence interval of the population…

Q: a) Find a 90% confidence interval for the proportion of Americans who would agree with this. b)…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Find a 95% confidence interval for a mean, µ, where n = 324, x̄ = 2.7, s = .91, and se = .06.

A: Given: n = 324, x̄ = 2.7, s = .91, se = .06.

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: Which of the following illustrates a confidence level? a. 95%                     b.12.5…

A:

Q: When alpha is set to 0.01 what is the confidence level ? answer choices : 0.01 0.02 0.98 0.99

A: From the provided information, Level of significance (α) = 0.01

Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

A:

Q: Use the confidence interval to find the margin of error and the sample mean. (0.062,0.200) ..... The…

A: The random variable X follows normal distribution. The confidence interval for population mean is…

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

A:

Q: Determine the sample size for a on-line survey with a variability of 30% and a 95% confidence…

A: Sample size n=z2(p*q)/e2

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

A: a.The confidence level and α for a 90% confidence interval is obtained below:The confidence level is…

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: 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: x=111, n=194, Confidence level = 99%

A: The sample proportion of p is, p^=xn=111194=0.5722 Computation of critical value:…

Q: kendall wants to estimate the percentage of vegetarians who are also vegan. She surveys 150…

A: The margin of error for the 95% confidence interval of population proportion is given as follows :…

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

A:

Q: How large is the sample if the confidence level is 97%, Ɛ = 2.5%  and ρ = .35?

A:

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

A: Given x=16 n=25

Q: If the alpha level is .05, then the confidence level is ?

A: Given: alpha = 0.05 confidence level / significant level = 1 - alpha

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: Education Television In a random sample of 200 people, 154 said that they watched educational…

A: Given that, X = 154 N = 200 90% confidence level

Q: c. Find the confidence interval for the population mean with confidence level of 99%

A:

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: It is given that n=195 and x=162. The sample proportion is 162/195 = 0.8308 The sample size is 195…

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: Is 12 minutes the margin of error for this 95% confidence interval v [Select ]

A: The 95% confidence interval for the average arrival time before departure for all air travellers is…

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

A: The level of significance can be defined as the probability of rejecting the null hypothesis when it…

Q: Use the given confidence interval to find the margin of error and the sample mean.  (4.81, 8.09)

A: The confidence interval is given by (4.81, 8.09)

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: Describe when you would use a t-score instead of a z-score when finding a confidence interval.

A: Describe in what conditions t-score would be used instead of a z-score when finding a confidence…

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given data,n = 85x = 49 Sample proportion(p) = xn =4985=0.576Ƶ-value at 98% confidence is Ƶc = 2.326

Q: Use the confidence interval to find the margin of error and the sample mean.   (.364,0.500)

A:

Q: A soft drink company surveys 500 shoppers and finds that 61% of shoppers prefer diet soda to regular…

A:

Q: Construct a confidence interval for the population proportion p. n ? 144, x ? 86, 90% confidence

A: Given: Confidence level = 0.90 Sample size (n) = 144 x = 86 Sample proportion p^=xn=86144

Q: The principal randomly selected six students to take an aptitude test. Their scores were: 88.0 84.1…

A: Solution: Let X be the score. The given data is 88, 84.1, 74.9, 83.2, 83.7 and 85.5.

Q: The principal randomly selected six students to take an aptitude test. Their scores were 72.3 81.1…

A: Data given: 72.3, 81.1, 78.4, 80.9, 81.5, 75.5  Calculate mean: mean=72.3+81.1+78.4+80.9+81.5+75.5…

Q: Use the confidence interval to find the margin of error and the sample mean. (0.196,0.300) The…

A: Given confidence interval is (0.196  , 0.300)Upper limit(UL)=0.300Lower limit(LL)=0.196

Q: Use the given degree of confidence and sample data to construct a confidence interval for the…

A: Given data, n=195 x=126 p=x/n=126/195=0.646   z-value at 95% confidence is Zc=1.96

Q: Data are used either to test a hypothesis or to construct a confidence interval, but not both.…

A: Confidence intervals and hypothesis tests are similar during this they're both inferential methods…

Q: Find the value oft within a) 90% confidence level and n = 10 b) 95% confidence level and n = 6 c)…

A: As per our guidelines we are supposed to answer only 3 sub-parts of any question so I am solving…

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: 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: form a confidence interval for mean, proportion, and standard deviation.

A: Confidence interval for mean When sample size > 30 and population standard deviation is…