Question 2: A random sample of 200 observations produced a sample proportion of 0.35. Determine the 98% confidence interval for the population proportion. Answer:
Q: Calculate the lower 95% confidence interval for the population mean. (round to the nearest tenth)…
A: given data n = 31σ2 = 15∴σ = 15 = 3.873x¯ = 5695% ci for μ = ?
Q: Find the indicated margin of error. Out of 260 trials, 150 turned out positive. Find the margin of…
A: It is given that the sample size (n) is 260 and the number of positive trials (x) is 150.
Q: Construct the indicated confidence interval for the difference between population proportions p1 -…
A:
Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…
A: Introduction: The 100 (1 – α) % confidence interval for the population proportion, p is: Here, n is…
Q: A 95% confidence interval for the proportion p active voters in the municipality of Aibonito is 0.57…
A:
Q: In a survey of 3700 TV viewers, 834 said they watch network news programs. Find the margin of error…
A: Solution
Q: Find the margin of error for the 95% confidence interval used to estimate the population proportion.…
A: Confidence level = 95% Sample size (n) = 2440 Sample proportion (p̂) = 0.70
Q: A tester sampled randomly 150 bolts from a consignment. She noticed a standard deviation 6.2. Given…
A:
Q: For a sampling distribution of n = 500 and population proportion of 0.48 of those who prefer cookies…
A:
Q: To estimate the proportion of smoker a sample of 100 men was selected. In the selected sample, 40…
A:
Q: A poll for a statewide election has a margin of error of 1.3 percentage points. How many voters…
A:
Q: sample of 40 observations is selected from a normal population where the population variance is 625.…
A: According to the given information in this questionThere are more than three subparts according to…
Q: Find a 95% confidence interval for a population mean u for these values: d. n=28, x= 24.5, s=7.05 e.…
A: (d) Obtain the 95% confidence interval for the population mean. The 95% confidence interval for the…
Q: Construct the confidence interval for the population mean y. C= 0.90, x=16.6, o= 10.0, and n= 80
A: Here, C=0.90, x=16.6, σ=10.0, and n=80.
Q: What is the value of Z for this confidence interval?
A: Given,sample size(n)=14795no.of people who said yes=2219no.of people who said no =12576
Q: When 307 college students are randomly selected and surveyed, it is found that 128 own a car. Find a…
A: Given Data Sample Size, n = 307 Number of successes, x = 128 Significance level,…
Q: na survey of 2231 adults in a recent year, 1464 say they have made a New Year's resolution.…
A: Given data, n=2231 x=1464 p=x/n=1464/2231=0.656
Q: If X 121, o =27, and n 38, construct a 95% confidence interval estimate of the population mean, u.…
A:
Q: Calculate a 95% upper confidence bound for the mean of a normally distributed population using the…
A: Given that, x = 32289 s = 2846 n=15 For 95% confidence interval,the z value is 1.96
Q: Construct the indicated confidence interval for the difference between population proportions p1-p2.…
A:
Q: The number of successes and the sample size are given for a simple random sample from a population.…
A: Obtain the value of sample proportion. The value of sample proportion is obtained below: From the…
Q: Calculate the lower endpoint of a two-sided 95% confidence interval for the population mean using…
A: given data sample size (n) = 32sample mean ( x¯ ) = 0.485sample standard deviatio (s) = 0.36995% ci…
Q: An environmentalist wants to find out the fraction of oil tankers that have spills each month. Step…
A: From the provided information,Confidence level = 95%
Q: In a survey of 2461 adults in a recent year, 1239 say they have made a New Year's resolution.…
A:
Q: A confidence interval was constructed to approximate a population proportion. The interval was from…
A: We have given that, Let p̂ represents the sample proportion and E represents the margin of error,…
Q: Use the given degree of confidence and sample data to construct a confidence interval for the…
A: Obtain the 99% confidence interval for the true proportion of all college students who own a car.…
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: In a survey of 2105 adults in a recent year, 737 made a New Year's resolution to eat healthier.…
A:
Q: If X=72, σ=13, and n=66, construct a 95% confidence interval estimate of the population…
A:
Q: An insurance company collects data on seat-belt use among drivers in a country. 90% confidence…
A: Givenn1=2000p1^=28%=0.28P2^=xn2=4821500=0.32α=1-0.90=0.10α2=0.05zc=zα2=z0.05=1.6449 (from z…
Q: For a sampling distribution of n = 800 and population proportion of 0.42 of those who prefer cookies…
A: We have find distribution...
Q: In a survey of 2000 adults in a recent year, 713 made a New Year's resolution to eat healthier.…
A: We have given that Sample size n= 2000 Favorable cases x = 713 Sample proportion p^=x/n
Q: If n = 530 and X = 424, construct a 99% confidence interval for the population proportion, p. Give…
A:
Q: Given two independent random samples with the following results: n₂ = 510 n₁ = 685 x₁ = 38 x2 = 287…
A: The given results are: .
Q: In a survey of 2071 adults in a recent year, 1281 say they have made a New Year's resolution.…
A: Given n=2071 x=1281
Q: A confidence interval was constructed to approximate a population proportion. The interval was from…
A: Given Data Lower limit,LL = 12.5 upper limit,UL = 18.5
Q: 20. Suppose a 90% confidence interval is stated as (0.3011, 0.4189). What is the sample proportion…
A: The given 90% confidence interval for population proportion is, (0.3011, 0.4189) The upper limit is,…
Q: f. A sample of 60 Grade 10 students' ages was obtained to estimate the mean lot all Grade 9…
A:
Q: In a survey of 2445 adults in a recent year, 1491 say they have made a New Year's resolution.…
A: From the given information, let X be the number of adults have made a New Year’s resolution. X =…
Step by step
Solved in 3 steps with 1 images
- A proportion confidence interval problem resulted in the following interval as the answer: ( 0.5648 , 0.6048 ). A sample taken yielded the proportion to be 0.5848. What is the margin of error to the nearest percent?If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the level of confidence is 95% . What is the require sample size?Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she takes a sample of five friends and they say the last bass they caught was 9, 12, 13, 10, and 10 pounds. Find the t and calculate a 95% (α = .05) confidence interval.
- The following sample data are from a normal population: 10,9,12,14,13,11,6,5 c. With 95% confidence, what is the margin of error for the estimation of the population mean (to 1 decimal)? d. What is the 95% confidence interval for the population mean (to 1 decimal)? d.A researcher is attempting to calculate a 95% confidence interval for the number of blue Statsian Swallows in a particular rainforest. They take a sample and find that of the 215 swallows surveyed, 40 were blue. What is the 95% confidence interval for this sample? A researcher calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the sample size?About 25 randomly selected people were asked how long they slept at night. The mean time was 6 hours, and the standard deviation was 1 hour. Calculate the 98% confidence interval of the mean time by assuming that the variable is normally distributed. Provide only the value required below. Express your answer in 3 decimal places. a. tą (positive value only):
- A 95% confidence interval for a population proportion, p, is 0.23 < p < 0.27. What was the sample proportion?If n=200 and X=70, construct a 99% confidence interval estimate for the population proportion. SAS (Round to four decimal places as needed.)Imagine that you obtain a random sample of 125 M&M candies, and you notice that 28% of these candies are blue. If we convert the sample percentage of 0.28 to a sample proportion (by dividing 28 by 100), we get 0.28.
- Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96The following table gives the average number of hours 5 junior high students were left unsupervised each day and their corresponding overall grade averages. Hours Unsupervised 2 2 4 6 6 Overall Grades 64 73 76 77 86 Show Transcribed Text Step 1 of 5: Calculate the sum of squared errors (SSE). Use the values = 62.2000 and b, 3.2500 for the calculations, Round your answer to three decimal places Table Copy Data Step 2 of 5: Calculate the estimated variance of errors. 2. Round your answer to three decimal places. Show Transcribed Text Step 3 of 5: Calculate the estimated variance of slope. s. Round your answer to three decimal places.In a sample of 100 college students, 25 of them own a car. Calculate the 95% confidence interval for the true population of college students who own a car. Choose the closest one. A. (0.165132, 0.334868) B. (0.231725, 0.452302) C. (0.25, 0.75) D. (0.1, 0.9)