In a sample of 17 days in July, the mean temperature for a certain city was 99.1°F with a standard deviation of 4.8°F.a.) How many degrees of freedom will be used for the given sample size?O 18O 34O 17O 16b.) What is the critical value ta/2 that corresponds to a 90% confidence level?O1.75O1.7401.34O1.33c.) What is the 90% confidence interval estimate of the mean temperature in July for the city?O (97.00,101.20)O (97.13,101.07)O (97.07,101.13)O (97.19,101.01)

Use the t -distribution a) Degrees of Freedom = n-1 = 17 - 1 = 16 Option :- 16 b) Critical value…

Answered: In a sample of 17 days in July, the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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53.305) B. (24.591, 35.563) C. (26.591, 37.563) D. (28.591, 39.563) 34. A simple random sample of size n = 36 is taken from a normally distributed original population. The sample standard deviation iss = 7. Find the 99% confidence interval for the population variance o2. A. (27.453, 98.756) B. (28.453, 99.756) C. (29.453, 100.756) D. (30.453, 101.756)
Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X= the number of pairs of sneakers owned. The results are as follows: X Frequency Relative Frequency Cumulative Relative Frequency 1 2 2 5 3 8 4 12 5 12 7 1 a.) Find the sample mean x. (Round your answer to two decimal places.) b.) Find the sample standard deviation, s. (Round your answer to two decimal places.) c.) Find the first quartile. d.) Find the median. e.) find the 3rd quartile f.) What percent of the students owned at least five pairs? (Round your answer to one decimal place.) g.) Find the 40th percentile. h.) find the 90th percentile İ) Contruct a box plot of the data j) complete the columns of the chart k) construct a histogram of the data
A hotel chain wants to estimate the mean number of rooms rented daily in a given month. The population of rooms rented daily is assumed to be normally distributed for each month with a standard deviation of 240 rooms. During February, a sample of 25 days has a sample mean of 370 rooms. The critical value for a 90% confidence interval for this sample is ________. Question 12 options: 1) 2.58 2) 1.96 3) 2.649 4) 1.645
The test scores in a certain statistics class are normally distributed with a mean of 76 and a standard deviation of 5. a.) Use the Empirical Rule to estimate the percentage of students who scored between 66 and 86 points. b.) Compute the z-score for a test score of 79 points. a. 0.97 b. 0.6 C. -0.6 d. -0.97 c.) What proportion of the scores were below 79 points? a. 0.7257 b. 0.834 c. 0.2743 d. 0.166
The actual voltages of power packs labeled as 12 volts are as follows: 11.77, 11.90, 11.64, 11.84, 12.13, 11.99, and 11.77. A confidence interval for this sample would be based on the t distribution with _____ degrees of freedom
A sample of 19 elements was used to construct a 99% confidence interval for the population variance, the chi-square value (s) used for this test are: Select one: a. 7.015 to 34.805 b. 7.633 to 36.191 O c. 6.844 to 38.582 d. 6.265 to 37.156 ge Next page ETIVITY NEXT ACTIVITY Jump to. Midterm 1
In a study using 14 samples, and in which the population variance is unknown, the distribution that should be used to calculate confidence intervals is A.) a standard normal distribution. B.) at distribution with 13 degrees of freedom. C.) at distribution with 14 degrees of freedom. D.) at distribution with 15 degrees of freedom. 1.
The lengths of adult males' hands are normally distributed with mean 188 mm and standard deviation is 7.1 mm. Suppose that 46 individuals are randomly chosen. Round all answers to 4 where possible. a. For the group of 46, find the probability that the average hand length is less than 186. ? b. Find the third quartile for the average adult male hand length for this sample size. ?

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