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=218, x = 30.4 hg, s = 7.6 hg. The confidence level is 99%....Select the correct choice below and, if necessary, fill in the answer box to complete your choice.OA. ta/2=(Round to two decimal places as needed.)OB. Za/2(Round to two decimal places as needed.)OC. Neither the normal distribution nor the t distribution applies.

Given that Sample size n =218 Sample mean =30.4 Sample standard deviation =7.6

Answered: Assume that we want to construct a…

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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Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value /2. (b) find the critical value za/2, or (c) state that neither the normal distribution nor the t distribution applies. 40 The confidence level is 99%, o = 3729 thousand dollars, and the histogram of 63 player salaries (in thousands of dollars) of football players on a team is as shown. 30- 20 10 0- 0. 4000 8000 12000 16000 20000 Salary (thousands of dallars) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA /2=L (Round to two decimal places as needed.) O B. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies. PY Help me solve this View an example Get more help - LS Clear all Check answer am Conroant I Om Valued 1aM Strong am beauhul I am Smart an WORTHIT! SAP Aouanbay
The grade point averages (GPA) for 12 randomly selected college students are shown on the right. Complete parts (a) through (c) below. Assume the population is normally distributed (a) Find the sample mean. x= (Round to two decimal places as needed.) X (b) Find the sample standard deviation. (Round to two decimal places as needed.) (c) Construct a 90% confidence interval for the population mean μ. A 90% confidence interval for the population mean is (Round to two decimal places as needed.) 2.3 3.1 2.9 1.9 0.6 4.0 2.5 1.1 3.7 0.1 2.3 3.3
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Mrs. Gallas wanted to estimate the average weight of an Oreo cookie to determine if theaverage weight was less than advertised. She selected a random sample of 30 cookies andfound the weight of each cookie (in grams). The mean weight was = 11.1921 grams with astandard deviation of sx = 0.0817 grams. Make a 95% confidence interval to estimate the truemean weight of an Oreo. 1. What is the formula for calculating the standard deviation of the sampling distribution of x? 2.What condition must be met to use this formula? Has it been met?
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t12, (b) find the critical value z, 12, or (c) state that neither the normal 40- distribution nor the t distribution applies. 30- The confidence level is 95%, o is not known, and the histogram of 61 player salaries (in thousands of dollars) of football players on a team is as shown. 20- 10- 0- 0. 4000 8000 12000 16000 20000 Salary (thousands of dollars) .... Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O 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. Frequency
Use technology to construct the confidence intervals for the population variance o² and the population standard deviation a. Assume the sample is taken from a normally distributed population. c=0.99, s= 33, n= 16 The confidence interval for the population variance is ( ). (Round to two decimal places as needed.) The confidence interval for the population standard deviation is ( ). (Round to two decimal places as needed.)
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
A sample of 8 adult elephants had an average weight of 12,300 pounds. the standard deviation for the sample was 22 pounds. find the 95% confidence interval of the population mean for the weights of adult elephants. (the t distribution, table F, must be used for the confidence interval.)
A simple random sample of size n=40 is drawn from a population. The sample mean is found to be x=120.5 and the sample standard deviation is found to be s=13.4. Construct a 99% confidence interval for the population mean. What is the lower and upper bound?
Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value t/2, (b) find the critical value z,/2, or (c) state that neither the normal distribution nor the t distribution applies. 230, x 32.6 hg, s = 7.9 hg. The confidence level is 90% Here are summary statistics for randomly selected weights of newborn girls: n Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. (Round to two decimal places as needed.) В. Za/2 (Round to two decimal places as needed.) C. Neither the normal distribution nor the t distribution applies.
Construct the indicated confidence interval for the population mean µ using the t-distribution. Assume the population is normally distributed. c = 0.95, x= 13.8, s=0.59, n= 19 ..... (Round to one decimal place as needed.)

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