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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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When making a confidence interval for the population mean for small
a. n-2
b. n-1
c. n
d. n+1
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- Use the given data to find the 95% confidence interval estimate of the population mean u. Assume that the population has a normal distribution. IQ scores of professional athletes: Sample size n = 30 Mean x = 106 Standard deviation s = 12arrow_forwardTina 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.arrow_forwardAs part of a water quality survey, you test the water hardness in several randomly selected streams. The results are shown below. Construct a confidence interval for the population variance sigma squared and the population standard deviation sigma. Use a 90% level of confidence. Assume that the population has a normal distribution. n = 23s = 18 grains per gallon a) The confidence interval for the population variance sigma squared is: b) The confidence interval for the population standard deviation sigma is:arrow_forward
- Construct the indicated confidence interval for the population mean u using the t-distribution. Assume the population is normally distributed.c=0.95, x=14.6, s=2.0, n=5arrow_forwardThe data set below represents the weights in grams of 10 randomly selected adult male fox squirrels from a forest. Assume the weights are normally distributed. 821 857 782 930 720 821 794 876 810 840 Find the sample mean and sample standard deviation Construct a 90% confidence interval for the population mean. Interpret the results from b.arrow_forwardConstruct the confidence interval for the population mean μ. c=0.90, x=16.7, σ=7.0, and n=45arrow_forward
- Use the following sample information below to calculate the confidence interval to estimate the population proportion. Let x be the number of items in the sample having the characteristic of interest. a. n = 116 and x = 57, with 99% confidence b. n = 800 and x = 479, with 97% confidence c. n = 240 and x = 106, with 85% confidence d. n = 60 and x = 21, with 90% confidencearrow_forwardA survey was given to 357 people asking whether people like dogs and/or cats. 172 said they like dogs 169 said they like cats 86 sald they don't like cats or dogs. How many said they liked both cats and dogs? people liked both cats and dogs.arrow_forwardhelp please answer in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all workingarrow_forward
- At a charter high school, the average GPA of a high school senior is known to be normally distributed. After a sample of 27 seniors is taken, the average GPA is found to be 2.85 and the sample variance is determined to be 0.16. Find a 95% confidence interval for the population mean GPA. a. 2.5615 to 2.8585 b. 2.6358 to 3.0642 c. 2.6917 to 3.0083 d. 2.5167 to 2.9033arrow_forwardConstruct the indicated confidence interval for the population mean y using the t- distribution. Assume the population is normally distributed. C=0.99, x=12.6, s= 0.81, n=17arrow_forwardIn testing for the differences between the means of two independent populations where the variances in each population are unknown but assumed equal, the degrees of freedom are Seleccione una: OA. n- 1. O B. m + n2 - 1. OC. n- 2. OD. m + n2 - 2.arrow_forward
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