A random sample of 116 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.90 sec and a sample standard deviation of 0.45 sec. Calculate a 99% (two-sided) confidence interval for the true average echo duration µ. (Round your answers to two decimal places.) sec Interpret the resulting interval. We are 99% confident that this interval does not contain the true population mean. We are 99% confident that the true population mean lies above this interval. We are 99% confident that this interval contains the true population mean. We are 99% confident that the true population mean lies below this interval. O O O O

A random sample of 116 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.90 sec and a sample standard deviation of 0.45 sec. Calculate a 99% (two-sided) confidence interval for the true average echo duration µ. (Round your answers to two decimal places.) sec Interpret the resulting interval. We are 99% confident that this interval does not contain the true population mean. We are 99% confident that the true population mean lies above this interval. We are 99% confident that this interval contains the true population mean. We are 99% confident that the true population mean lies below this interval. O O O O

Name: A random sample of 116 lightning flashes in a certain region resulted
Uploaded: 2024-03-20T07:07:12.000Z
Channel: Bartleby
Description: A random sample of 116 lightning flashes in a certain region resulted in a sample average radar echo duration of 0.90 sec and a sample standard deviation of 0.45 sec. Calculate a99% (two-sided) confidence interval for the true average echo duration

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

See similar textbooks

Similar questions

Question 2 Scientists believe that global warming has changed the mean temperature. To measure this effect is construct a 90% confidence interval for the sample mean. The sample standard deviation of the minimum temperature in the Salt Lake area is 2.47, and the sample mean is 42.35 on 36 degrees of freedom. The mean temperature of the daily minimum in SLC was 39.22 before 1980. If this mean value is not contained in the confidence interval we reject the null hypothesis. See: https://www.nytimes.com/2019/02/28/learning/teach-about-climate-change-with-these-24- new-york-times-graphs.html e Note this is real data obtained from the weather stations in SLC. (41.92,42.79 No answer text provided. (41.9,42.8) O (41.7,43) O (41.83,42.88)
QUESTION 1 A recent study of over 1000 parents on cyberbullying showed that a 95% confidence interval of proportion of kids who faced bullying in social media sites and apps is (0.1200, 0.1433). Find the sample proportion of kids who faced bullying in social media sites and apps. Round your answer to four decimal places. QUESTION 2 The amount of time a bank teller spends with each customer has a population mean of 5 minutes and a standard deviation of 1.5 minute. If a random sample of 36 customers is selected, what is the probability that the sample mean is less than 4.5 minutes? Round your answer to four decimal places. QUESTION 3 The daily electrical energy consumption (in Watts) during July for a random sample of households was recorded. The mean was 3399 W and the standard deviation was 316 W. Assume the underlying distribution of the consumption is normal. Find the marging of error E of the 95% confidence interval for the mean daily electrical energy consumption during that month.…
Question 6 Assume that a sample is used to estimate a population mean μ. Find the 98% confidence interval for a sample of size 57 with a mean of 30.8 and a standard deviation of 10.5. Enter your answer as an open- interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 98% C.I. Next Question 8p
QUESTION 18 In a bakery, a sample of 19 days was taken to study the daily sales. It was found that the mean daily sales are 124 with a sample standard deviation is 68. The 98 percent upper confidence limit for the population mean a daily sale would be? (Round answer to two decimal places ex. 2.09)
Question 5 Assume that a sample is used to estimate a population mean p. Find the 90% confidence interval for a sample of size 71 with a mean of 57.2 and a standard deviation of 20.7. Enter your answer as an open- interval (i.e., parentheses) accurate to one decimal place (because the sample statistics are reported accurate to one decimal place). 90% C.I. %3D Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places. Submit Question
question#5 Assume that a sample is used to estimate a population mean μμ. Find the 99.5% confidence interval for a sample of size 73 with a mean of 26.5 and a standard deviation of 14.4. Enter your answer as an open-interval (i.e., parentheses) accurate to 3 decimal places.99.5% C.I. =
QUESTION 22 Suppose that the average number of grams of fat consumed in a day for the sample of 9 adults is 77 grams with a standard deviation of 24.1 grams. If the fat consumption by adults is normally distributed, find the margin of error (E) of the 90% confidence interval for the mean number of grams of fat consumed daily by adults. Round your answer to one decimal place.
A random sample of 27 fields of rye has a mean yield of 43.1 bushels per acre and standard deviation of 5.31 bushels per acre. Determine the 80% confidence interval for the true mean yield. Assume the population is approximately normal. Step 1 of 2 : Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
QUESTION 1 A hardware store determined the current balances for a random sample of 100 customers with non-zero balances. The sample mean of the amount owed was $100.00 and the standard deviation was $25. Use the assumption that the sample standard deviation is equal to the population standard deviation. You are asked to find a confidence interval for the average amount owed by all customers with a non-zero balance. Which Minitab procedure would be most appropriate to use for this task? O Power and Sample Size/1-Sample Z O Power and Sample Size/Sample Size for Estimation/1-Sample Z O Basic Statistics/1-Sample Z O Basic Statistics/1-Sample t
Question 8 A factory makes bath bombs. According to the factory, the weight of a bath bomb has a mean of 4.20 oz and standard deviation of 0.5 oz. To verify whether the bath bomb indeed has a mean weight of 4.20 oz, we sampled 144 bath bombs and found a sample mean of 4.15 oz. Please compute the p-value for the hypothesis test that verifies whether the mean weight of the soap equals 4.20 oz or not: Please round your result to 2 decimal places. Answer (Correctly):____________________-
a. What is the probability of seeing positive change? b. What is the probability of seeing positive change given that the tree is oak? c. Do the data suggest effect and tree type are independent events? yes or no
QUESTION 9 Nabisco claims that Chip Ahoy Cookies have an x ̅=28.67 chocolate chips per cookie with a SD=2.67. You randomly select 15 cookies from a new bag and carefully remove all the chocolate chips from each of the 36 cookies. You find the mean of the chocolate chips for the 15 cookies is 24.27 chocolate chips per cookie. Calculate the 99% confidence interval LOWER bound for the chocolate chips in your experiment. (round to the nearest hundredth).