A statistics instructor is worry about his mortality so they randomly select 25 relativeswho had died and collected the age when they died. The instructor calculated samplemean age when they died to be 74.4 years with a sample standard deviation of 11.4years.Find the margin of error for a 90% confidence interval.Round critical value to two decimal place.Round standard error answer to one decimal place.Round final answer to one decimal place.

To find the margin of error for a 90% confidence interval, we need to calculate the critical value…

Answered: A statistics instructor is worry about…

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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A nurse at a local hospital is interested in estimating the birth weight of infants. How large a sample must she select if she desires to be 98% confident that the true mean is within 2 ounces of the sample mean? The population standard deviation of the birth weights is known to be 5 ounces. O A. 6 O B. 33 O C. 34 O D. 5 Click to select your answer. DELL EVD RW Op DELL
Consider the following sample: 1, 4, 7, 2, 6. How does the standard deviation change when the 7 is replaced with a 12? Answer intuitively first, and then check your answers numerically.
A developmental psychologist is interested in studying how long babies gaze at a photograph of a human face. To test this question, she shows a picture to a sample of six babies and records the length of their gaze in seconds. The data are as follows: 12, 17, 18, 20, 20, 29. Calculate the mean, median, mode, range, variance and standard deviation for the sample.
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In a normal distribution, it is found that the mean is 56 and the standard deviation is 5, Find the range values where 95.60% of the data lies.
Find the standard deviation.. Round to one more place than the data 7,19,20,8,17, 14, 8, 20, 12 O A. 5.1 O B. 1.7 O C. 5.4 O D. 5.7
In a survey, 19 people were asked how much they spent on their child's last birthday gift. The results were roughly bell-shaped with a mean of $44.7 and standard deviation of $16.8. Estimate how much a typical parent would spend on their child's birthday gift (use a 98% confidence level). Give your answers to 3 decimal places. Express your answer in the format of E. $ + $
A Moving to another question will save this response. Question 5 The national scores on an exam were normal distributed with a mean of 428 and a standard deviation of 113. Approximately what percent of those taking this test had scores between 315 and 541? A Moving to another question will save this response. Session 10 GN.docx MacBook Pro
Please help me with this question.
A particular fruit's weights are normally distributed, with a mean of 308 grams and a standard deviation of 19 grams.The heaviest 15% of fruits weigh more than how many grams?Give your answer to the nearest gram.
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