Use the given information to find the number of degrees of freedom, the critical values x²random sample has been selected from a population with a normal distribution.Nicotine in menthol cigarettes 98% confidence; n = 23, s = 0.27 mg.df =(Type a whole number.)anddx, and the confidence interval estimate of o. It is reasonable to assume that a simple

Given that Confidence level = 98% n = 23 s = 0.27 mg. We have to find the…

Answered: Use the given information to find 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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Here are summary statistics for randomly selected weights of newborn girls: n= 189, x= 30.4 hg, s= 6.3 hg. Construct a confidence interval estimate of the mean. Use a 99% confidence level. Are these results very different from the confidence interval 29.3 hg < µ< 32.1 hg with only 16 sample values, x= 30.7 hg, and s = 1.9 hg? What is the confidence interval for the population mean p? hg
Assume that we want to construct a confidence interval. Do one of the following, as approp itical value t,/22 (b) find the critical value za/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n = 279, x= 30.3 hg, s = 7.2 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. ta/2= (Round to two decimal places as needed.) В. Za/2 = (Round to two decimal places as needed.) O c. Neither the normal distribution nor the t distribution applies.
Here are summary statistics for randomly selected weights of newborn girls: n=157, x=29.4 hg, s=6.7 Construct a confidence interval estimate of the mean. Use a 95% confidence level. Are these results very different from the confidence interval 28.8 hg<μ<31.0 hg with only 20 sample values, x=29.9 hg, and s=2.4 hg? What is the confidence interval for the population mean μ? nothing hg<μ<nothing hg (Round to one decimal place as needed.)
The data in Table represent the population of the statistics students and the marks obtained in the examination on hypothesis tests. Knowing that the previous data are from the population with a normal distributionDetermine:1. Using the T distribution. Make a confidence interval for a 95% confidence level. Alpha mean = .05 enter right value XX.XX Table: 0 0 0 0 0 5 10 15 15 15 20 20 25 25 40 45 50 50 55 75 80 85 90 95 105
In a random sample of 24 people, the mean commute time to work was 33.1 minutes and the standard deviation was 7.3 minutes. Assume the population is normally distributed and use a t-distribution to construct a 90% confidence interval for the population mean µ. What is the margin of error of u? Interpret the results. The confidence interval for the population mean u is ( D (Round to one decimal place as needed.) The margin of error of u is (Round to one decimal place as needed.) Interpret the results. O A. If a large sample of people are taken approximately 90% of them will have commute times between the bounds of the confidence interval. O B. With 90% confidence, it can be said that the population mean commute time is between the bounds of the confidence interval. O C. It can be said that 90% of people have a commute time between the bounds of the confidence interval. O D. With 90% confidence, it can be said that the commute time is between the bounds of the confidence interval.
A statistics class is estimating the mean height of all female students at their college. They collect a random sample of 42 female students and measure their heights. The mean of the sample is 65.3 inches and the sample standard deviation is 5.4 inches. Find the 90% confidence interval for the mean height of all female students in their school? Assume that the distribution of individual female heights at this school is approximately normal. 1. The t value is 1.3025 2. The standard error has a value of -- 3. The margin of error has a value of 4. Find the 90% confidence interval for the mean height of all female students in their school
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to/2, (b) find the critical value Zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n = 286, x = 33.3 hg, s = 6.4 hg. The confidence level is 95%. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. ta/2= B. (Round to two decimal places as needed.) Za/2 = (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value tα/2, (b) find the critical value zα/2, or (c) state that neither the normal distribution nor the t distribution applies. Here are summary statistics for randomly selected weights of newborn girls: n=236, x=31.6 hg, s=6.9 hg. The confidence level is 90%.
II. A. Find the t-value corresponding to each level of confidence and degrees of freedom. (2 pts) 1. 90% confidence level and n= 12 2. 99% confidence level and n=20 3. a =1% and n= 16
Find the critical value t, for the confidence level c = 0.99 and sample size n = 20. Click the icon to view the t-distribution table. ...... (Round to the nearest thousandth as needed.)
Here are summary statistics for randomly selected weights of newborn girls: n=218, x=32.8hg,s=6.2hg. Construct a confidence interval estimate of the mean. Use a 90% confidence level. Are these results very different from the confidence interval 32.0hg <μ<33.4 hg with only 20 sample values, x=32.7hg, and s=1.8hg? What is the confidence interval for the population mean μ?_____hg <μ<___hg Are the results between the two confidence intervals very different?
Which alternative hypotheses will allow you to determine statistical significance at α = 0.05 using a 95% confidence interval? H a: μ = 30 H a: μ > 30 H a: μ ≠ 30 H a: μ <30

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