The state education commission wants to estimate the fraction of tenth grade students that have reading skills at or below the eighth grade level. Step 2 of 2: Suppose a sample of 281 tenth graders is drawn. Of the students sampled, 56 read at or below the eighth grade level. Using the data, construct the 80 % confidence interval for the population proportion of tenth graders reading at or below the eighth grade level. Round your answers to three decimal places.

Q: In 2016 the CDC wanted to estimate the proportion of adults who are smokers in the U.S. The…

A:

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: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: Given: n= 1031 ,x= 545 need to find point estimation for p.

Q: A survey of 1,000 adults showed 58% believed the driving age should be changed from 16 years of age…

A: Provided information: Number of adults in a survey = 1000 58% believed the driving age should be…

Q: A survey of 700 non-fatal accidents showed that 167 involved uninsured drivers. Construct a 99%…

A: Given data,n=700x=167Point estimate isp=xn=167700=0.2386Construct a 99% confidence interval?

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

A:

Q: A professor is interested in how attendance influences grades her class. She goes through her…

A: 1) Given Data :  We will calculate the point estimate which will be the mean of this sample data,…

Q: A poll of 1060 adults in a country was conducted by telephone. Of those surveyed, 169 had…

A: The sample size is 1060 and number of success is 169.

Q: Rosetta wants to estimate the percentage of people who rent their home. She surveys 250 individuals…

A: The formula for 100(1-α)% confidence interval for population proportion is,

Q: In a class of 37 students, 47% of them said that math was their favorite subject. Construct an 85%…

A: n=37,p^=0.47α=0.15 Solution-: Let, X= Number of students said that math was their favorite subject…

Q: A researcher is interested to find out the proportion of registered nurses in Manitoba who are more…

A: Given that the sample of 89 from the records of members of Manitoba Nursing Association and she…

Q: You are interested in finding a 95% confidence interval for the average commute that non-residential…

A: Given sample is : 10 25 11 16 20 27 10 24 14 28 Sample size n = 10 sample mean = 185/10 = 18.5…

Q: The percentage of high school graduates applying to multiple colleges has been increasing over the…

A: According to the given information,Population proportion, p = 34% = 0.34Sample size, n = 368Number…

Q: A random sample of 900 car owners in a particular city found 252 car owners who received a speeding…

A: Given,n=900x=252p^=xnp^=252900=0.281-p^=1-0.28=0.72α=1-0.95=0.05α2=0.025Z0.025 =1.96   (from…

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: Educational Television In a random sample of 205 people, 143 said that they watched educational…

A:

Q: Heather runs a successful lawn-mowing business. She would like to estimate the true mean amount of…

A: Given that  Sample size n =30 90 % confidence interval is (40 , 55)

Q: A research group asked 4488 Americans how they fall asleep, and 536 of them fall asleep on their…

A:

Q: 71 S4 4 Aphilantvopic organization knows that s donors have an average age near 60 and is…

A:

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: Several years ago, 39% of parents who had children in grades K-12 were satisfied with the quality of…

A:

Q: Part a and b

A:

Q: Javier wants to estimate the percentage of people who have purchased a used car. He surveys 250…

A: From the provided information, Sample size (n) = 250 From which 212 have purchased a used car.…

Q: Billy wants to estimate the percentage of students who live more than three miles from the school.…

A: The 95% confidence interval:The 95% confidence interval for the population proportion, π is such…

Q: Use the sample data and confidence level given below to complete parts​ (a) through​ (d).   A…

A:

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

A: The sample size is 1072, 67% say they are willing to get a second or part-time job to pay for their…

Q: USE THE INFORMATION BELOW TO ANSWER QUESTIONS 4 THRU 6 In 2020 researchers took random samples to…

A: Givenconfidence interval is (0.013 , 0.049)conficence level = 96%

Q: Jane wants to estimate the proportion of students on her campus who eat cauliflower. After surveying…

A: The answer is attached below,

Q: Suppose you calculate a 95% confidence interval for a proportion to to be: 0.39 to 0.78. Determine…

A: Given,   Lower bound = 0.39​ Upper bound = 0.78   Here, we use to determine the margin of error.

Q: Examining a random sample of records from my past Statistics classes, I found the 47 of the 282…

A:

Q: What is the confidence interval? Select the correct choice below and, if necessary, fill in the…

A: Mean = 56.64 Standard deviation = 14.598 n=100

Q: Construct the confidence interval for the population mean for the number of hours that students…

A: To calculate: The 97% confidence interval.

Q: You receive a brochure from a large university. The brochure indicates that the mean class size for​…

A: Sample size is, Population mean is Confidence Level is The objective is to test the claim that the…

Q: In a survey of 3089 adults aged 57 through 85 years, it was found that 88.5% of them used at least…

A: