Here are summary statistics for randomly selected weights of newborn girls: n = 36, \( \overline{x} = 3216.7 \) g, s = 688.5 g. Use a confidence level of 99% to complete parts (a) through (d) below.---**a. Identify the critical value \( t_{\alpha/2} \) used for finding the margin of error.**\( t_{\alpha/2} = \_\_ \)(Round to two decimal places as needed.)---**b. Find the margin of error.**\( E = \_\_ \) g(Round to one decimal place as needed.)---**c. Find the confidence interval estimate of \( \mu \).**\( \_\_ \) g \( < \mu < \) \_\_ g(Round to one decimal place as needed.)---**d. Write a brief statement that interprets the confidence interval. Choose the correct answer below.**- A. One has 99% confidence that the sample mean weight of newborn girls is equal to the population mean weight of newborn girls.- B. Approximately 99% of sample mean weights of newborn girls will fall between the lower bound and the upper bound.- C. One has 99% confidence that the interval from the lower bound to the upper bound contains the true value of the population mean weight of newborn girls.- D. There is a 99% chance that the true value of the population mean weight of newborn girls will fall between the lower bound and the upper bound.

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Answered: Here are summary statistics for…

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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The next five questions refer to the following scenario: • sample mean T = 10 • sample size n = 100 • population standard deviation O = 4
A student who took Stat 2 last semester learns that their overall course score was at the 85th percentile. Assuming that a histogram of all the Stat 2 course scores from last semester follows the normal curve, this means that this student had a score that was how many SDs above the average score? Choose the answer that is closest. Group of answer choices 1.15 1.05 1.10 1.0 PreviousNext
When forming a confidence interval for matched-pair data the point estimate is the Select one: O A. standard deviation of the differences. OB. differences of the standard deviations. O C. mean of the differences. O D. difference of the means.
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People were polled on how many books they read the previous year. Initial survey results indicate that s = 14.3 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires 35 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two books with 90% confidence? This 90% confidence level requires subjects. (Round up to the nearest subject.)
People were polled on how many books they read the previous year. Initial survey results indicate that s = 14.3 books. Complete parts (a) through (d) below. Click the icon to view a partial table of critical values. GOLDA (a) How many subjects are needed to estimate the mean number of books read the previous year within four books with 90% confidence? This 90% confidence level requires 35 subjects. (Round up to the nearest subject.) (b) How many subjects are needed to estimate the mean number of books read the previous year within two books with 90% confidence? This 90% confidence level requires 139 subjects. (Round up to the nearest subject.) (c) What effect does doubling the re accuracy have on the sample size? OA. Doubling the required accuracy nearly doubles the sample size. B. Doubling the required accuracy nearly halves the sample size. C. Doubling the required accuracy nearly quadruples the sample size. D. Doubling the required accuracy nearly quarters the sample size. (d) How…
In the 1992 presidential election, Alaska's 40 election districts averaged 2002 votes per district for President Clinton. The standard deviation was 566. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places. Find the third quartile for votes for President Clinton. Round your answer to the nearest whole number.
please make your answers clear
Researchers studied the mean egg length (in millimeters) for a bird population. After taking a random sample of eggs, they obtained a 95% confidence interval of (45,60). What is the value of the margin of error? Choose the correct answer below. A. 15 mm B. 52.5 mm O c. 7.5 mm O D. 1.96
A poll was conducted that asked 1015 people how many books they had read in the past year. Results indicated that x= 14.3 books and s= 16.6 books. Construct a 90% confidence interval for the mean number of books people read. E Click the icon to view the table of areas under the t-distribution, Construct a 90% confidence interval for the mean number of books people read. ) (Use ascending order. Round to two decimal places as needed.)

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