QUESTION 5 The health department is estimating the percentage of smokers among adults aged between 18-22. A random sample of 50 students was used and 16 are reported as smokers. Find the corresponding critical value for calculating 97.5% confidence interval. Round your answer to three decimal places.
Q: A student polls his school to see if students in the school district are for or against the new…
A: Given: Sample size (n) = 366 Number of students who are against the new legislation (x) = 287
Q: A random sample of 46 four-year-olds attending day care centers provided a yearly tuition average…
A: Solution
Q: A study was conducted to explore the relationship between a girl's birth order and her chance of…
A:
Q: In a sample of 310 adults, 285 had children. Construct a 90% confidence interval for the true…
A: From the provided information, Sample size (n) = 310 Confidence level = 90%
Q: A recent study of a very large number of parents on cyberbullying showed that a 95% confidence…
A: Given data,For 95% CILower limit=0.1238Upper limit =0.2036Proportion (p)=?
Q: 3. A researcher wants to estimate the impact of alcohol during pregnancy on premature delivery.…
A: Given : p1:probability of premature delivaries=0.12p2:proportion of normal pregnancies…
Q: In a survey of 3084 adults aged 57 through 85 years it was found that 81.9% of them used at least…
A: Given : Sample Size, n = 3084 confidence level,c=0.9 Significance level, α…
Q: Part a through d please. Thank you!
A: (a) Sample ProportionThe symbol "p̂" represents the sample proportion or the point estimate of the…
Q: mpling process is repeated many time sers who use this social media platfor
A: Option b) is correct. The estimate is given by p^ =0.458 + 0.5282 = 0.52
Q: There are many reasons adults use credit cards. A recent survey found that 66% of adults used credit…
A: 66% of adults use credit cards for convenience.Confidence level is 99% i.e., 0.99.Margin of error is…
Q: In a survey of 2263 adults, 742 say they believe in UFOS. Construct a 95% confidence interval for…
A:
Q: If n=31, (x-bar)=49, and s=3, construct a confidence interval at a 80% confidence level. Assume the…
A: Given, Sample size = 31 Sample mean = 49 Sample standard deviation = 3 Since the population…
Q: We would like to know: "What percentage of college students drink alcohol every day?" In a random…
A: Given that, N=500 X=75
Q: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…
A: Sample size Number of successes i.e., number of people who smoke is The objective is to construct…
Q: In a survey, 13 people were asked how much they spent on their child's last birthday gift. The…
A: We have to construct ci.
Q: 1. A consumer watch group interviewed a random sample of 1000 consumers and asked them if they are…
A: Here use confidence interval for population proportion
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: Exercise 2 Problem 12 12 Information. You are given the data in the table on the right 21 19…
A: Solution Here is two different questions I am solving exercise 2
Q: question 2 A simple random sample of 70 items from a population with 7 resulted in a sample mean…
A: The given data is as follows:Sample size, Population standard deviation, Sample mean,
Q: How do you solve? ref W9Q7.
A: For Women nw=10 α=1-0.90=0.10 Degrees of freedom is obtained as- df=10-1=9 The mean and standard…
Q: This was a question on my homework and I would like to know if I answered it correctly. Thank you…
A: Odds (O):The “odds” of the occurrence of an event is the ratio of the number of occurrences of the…
Q: As the president outlined sweeping new proposals aimed to reduce gun violence, a new CBS News/New…
A: 1. What are the sample and the statistic for the CBS News poll? Sample : 1110 adults nationwide…
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: Please need help with homework question
A: A) The results are said to be statistically significant if, P-value < significance level.Here,…
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: The American Heart Association is about to conduct an anti-smoking campaign and wants to know the…
A: Givensample size(n)=1421Americans who smoke(x)=454confidence level=90%
Q: If n = 18, = 46, and s = 16, construct a confidence interval at a 90% confidence level. Assume the…
A:
Q: Which of the following confidence intervals would have a wider width for the same set of data? A 90%…
A: We have to find which of the following confidence intervals would have a wider width for the same…
Q: Which of the following confidence intervals would have a wider width for the same set of data? A 90%…
A: which of the following confidence intervals would have a wider width for the same set of data?…
Q: If n = 41, ã=30, and s = 6, construct a confidence interval at a 80% confidence level.
A: It is given that Sample size n = 41 Sample mean = 30 Sample SD s = 6 The critical value of t at df =…
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: A poll asked for people's opinion on whether closing local newspapers would hurt civic life. 425 of…
A: We have given that, Favorable cases (X) = 425 and sample size (N) = 1002 Then, We will fins the…
Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…
A: Given that, a research institute poll asked respondents if they felt vulnerable to identify…
Q: Examining a random sample of records from my past Statistics classes, I found the 47 of the 282…
A:
Q: If n=19, x= 47, and s = 8, find the margin of error at a 99% confidence level Give your answer to…
A:
Q: A smart phone manufacturer is interested in constructing a 99% confidence interval for the…
A:
Q: Suppose a sample of 779 tenth graders is drawn. Of the students sampled, 202 read at or below the…
A: In question, Given that a sample of 779 tenth graders is drawn. Of the students sampled, 202 read at…
Q: A sample of 1100 observations taken from a population produced a sample proportion of 0.36 . Make a…
A: Given information Sample proportion = 0.36 Sample size (n) = 1100
Q: Use the information about each of the following samples to compute the confidence interval to…
A: Since you have posted a question with multiple sub parts, we will provide the solution only to the…
Q: Find the sample size of American adults you would need to predict the results of an election with a…
A:
Q: To construct a 95% Confidence Interval, we have to find the margin of error (ME), and we can use the…
A: From the provided information, Confidence level = 95% Standard error (SE) = 0.049 The z value at 95%…
Q: places. Answer:
A:
Q: feeling more enriched. For some reason that she can't quite figure out, most people don't believe…
A: Given Data Sample Size, n = 64 Number of successes, x = 34.0 Significance level,…
Q: You measure 30 watermelons' weights, and find they have a mean weight of 79 ounces. Assume the…
A: Mean =79Standard deviation = 13.7Sample size = 3099% confidence level
Q: Tina catches a 14-pound bass. She does not know the population mean or standard deviation. So she…
A: From the provided information, The data values are as follow: 9, 12, 13, 10 and 10 Sample size (n) =…
Step by step
Solved in 2 steps
- Question 2 3.8 3.0 4.0 4.8 3.0 4.2 3.5 4.7 4.4 4.2 4.3 3.8 3.3 4.0 3.8 Above are student evaluation ratings of courses in a university in Malaysia, where a rating of 5 is for "excellent.". Use a 90% confidence level. What does the confidence interval tell us about the population of students in Malaysia?Need some Help!!According to recent data by the American Marketing Association, 76.5%of people in the 18-24 age group used social media in 2017. You want to find out what the social media proportion is among your classmates who are all between 18 and 24 years old. Suppose you obtain a random sample of 229 students and find that 202 students in this sample are active social media users. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the actual proportion of social media users. A 99% confidence interval to estimate the actual proportion has a lower limit of------ and an upper limit of------- (Round to three decimal places as needed.) b. What is the margin of error for this sample? c. Is there evidence that this proportion matches that of the overall population based on the sample?
- QUESTION 8 A newspaper believes that the approval rating of the current mayor is 60%. A pollster believes that it is less than 60% and sets out to prove it. A simple random sample of 900 people are surveyed and 504 responded that they approved of his work. The null hypothesis is that the mayor's approval rating is 60%. The observed percentage is %. Find the standard error for percentage. Hint: The SD for the box model is 0.6*0.4 0.49 The standard error for percentage is %. Round your answer to the nearest tenth of a percent(for example 6.3%).Answer each question and justify all work for full You will need your z and t charts for this quiz. 1. Death penalty: A group claims that the overall feelings of the general population on the . death penalty is changing. 643 people were interviewed, and of them, 258 believed in using the death penalty. Construct a 95% confidence interval for the proportion of people that believe in the death penalty. Follow the steps below: What is the best point estimate for the proportion of people who believe in the death penalty? › (round to two decimal places)25. See photo
- Solve question #6 both part a and part b please and thank you.Use the information below to answer Questions #19 and #20. In a survey of 2327 adults, 726 say they believe in UFOS. Construct a 90% confidence interval for the population proportion of adults who believe in UFOS. Find the left end point for a 90% confidence interval. Round to three decimal places as needed.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. 1.96
- You are a researcher studying the antler size of male Alaskan Moose in a certain Alaska location. You gather a random sample of 18 male moose and record the width (in feet) of the antlers. The data is displayed in the table below. Estimate the mean antler width of all Alaskan male moose in this area. Use a 90% confidence level. 3.6 5.6 3.4 3.4 4 5.2 4.6 4.3 4.6 4.6 2.2 6.4 3.6 3.1 5.4 4.4 3.3 4.3 a) Find the confidence interval: < μμ < b) What is the margin of error of your interval? c) Interpret your 90% confidence interval in context.QUESTION IS IN IMAGESee picture attached