John Beale of Stanford, California, recorded the speeds of carsdriving past his house, where the speed limit read 20 mph. Themean of 100 representative readings was 23.76 mph, with astandard deviation of 3.53 mph.a) How many standard deviations from the mean would a cargoing the speed limit be?b) Which would be more unusual, a car traveling 35 mph or onegoing 8 mph?a) A car traveling at the speed limit isfrom the mean.(Round to two decimal places as needed.)b) Choose the correct answer below and fill in the answerbox(es) to complete your choice.(Round to two decimal places as needed.)OA.B.standard deviationsO C.The car traveling 35 mph is more unusual. It isstandard deviations from the mean, while the cartraveling 8 mph is standard deviations from themean.The car traveling 8 mph is more unusual. It isstandard deviations from the mean, while the cartraveling 35 mph is standard deviations from themean.Both cars are equally unusual. Both cars arestandard deviations from the mean.

Answered: Image /qna-images/answer/f9352e6d-67ce-4cee-a954-d919bc380f3e.jpg

Answered: a) How many standard deviations from…

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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Which of the following answers is correct and why? I really need an explanation for this question.
A scale is known to be "low-calibrated" in that it measures an aluminum bar to be 4 grams lower than the actual weight. If ????μold is the mean of all possible measurements of the bar using the old calibration, and ????μnew is the mean of all possible measurements of the bar using a re-calibrated scale. It is desired that ????−????=4μnew−μold=4. Consider the test ?0:????−????=4H0:μnew−μold=4 vs. ?0:????−????≠4H0:μnew−μold≠4 Sample after calibration: mean is 95.8 , SD is 4.9 and sample size is 10 Sample before calibration: mean is 89.352 , SD is 4.2 and sample size is 62 We do not know population standard deviations. What is the p-value? (Hint: best to use software, or else the Desmos Calculator for the 2 sample T and Z test)
Please answer Part b,c,d correctly d) Explain in context what your interval means. Select the correct choice below. A. 95% of all bags of tortilla chips will have a mean weight that falls within the interval. B. 95% of the weights of the bags of tortilla chips will be contained in the interval. C. The interval contains the true mean weight of the contents of a bag of tortilla chips 95% of the time D. We are 95% confident that the interval contains the true mean weight of the contents of a bag of tortilla chips
d). What is the pmf? 3) What is the median, ã ?
p2.q2) Can anyone help me with that question? It is easy but i am confused. Thank you
Consider the following data set. You may assume that the mean of this data set is x¯ = 7. 8 10 3 5 7 5 11 a) Find the range of the data set. b) Find the standard deviation of the data set. c) How many of the seven data points lie within one standard deviation of the mean?
These next questions come after part B. Which of the statements correctly describes the relationship between the mean and median in the histogram of the number of servings of fruit per day claimed by the 7474 seventeen‑year‑old girls? A) The mean and median are about equal because the distribution is right‑skewed. B) The mean is larger than the median because the distribution is right‑skewed. C) The median is larger than the mean because the distribution is right‑skewed. D) There is not enough information to tell us about the relationship between the mean and median in the histogram. (c) In general, you cannot find the exact values of median, quartiles, or mean from the histogram. What is special about the histogram of the number of servings of fruit that allows you to do this? Select an answer choice. A) We know exactly how many observations fall in each bin because of the way the bins are constructed. B) The sample size only consists of only 74…
The Acme Company manufactures widgets. The distribution of widget weights is bell-shaped. The widget weights have a mean of 63 ounces and a standard deviation of 7 ounces. a) 99.7% of the widget weights lie between and b) What percentage of the widget weights lie between 56 and 84 ounces? c) What percentage of the widget weights lie above 49 ? %
There are 15 numbers on a list, and the smallest number is changed from 4 to 0.4.a) Is it possible to determine by how much the mean changes? If so, by how much does it change?b) Is it possible to determine the value of the mean after the change? If so, what is the value?c) Is it possible to determine by how much the median changes? If so, by how much does it change?d) Is it possible to determine by how much the standard deviation changes? If so, by how much does it change
1
9. Which measures aren’t resistant? (more than one could be correct) a. mean b. median c. IQR d. Standard deviation e. range f. coefficient of correlation
In a city with three high schools, all the ninth graders took a Standardized Test, with these results: Number of ninth graders (Frequency) Mean Test Score High School Glenwood 82 262 Central 92 311 Lincoln 67 168 The city's PR manager, who never took statistics, claimed the mean score of all ninth graders in the city was the average of 82, 92, and 67, whic incorrect. What is the mean score for all ninth graders in the city? Round to one decimal place 80.3. Of course, that is Mean of all ninth grader's scores *

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a) How many standard deviations from the mean would a car going the speed limit be? b) Which would be more unusual, a car traveling 35 mph or one going 8 mph?