A homeowner recorded the speeds of cars driving past hishouse, where the speed limit 20 mph. The mean of 100readings was 24.05 mph, with a standard deviation of 3.73 mph.(The homeowner actually recorded every car for a two-monthperiod. These are 100 representative readings.) To see how.many cars are speeding, the homeowner subtracts 20 mph fromall speeds. Complete parts a and b....a) What is the mean speed now? What is the new standarddeviation?The new mean would be mph.The new standard deviation would bemph.(Type integers or decimals rounded to two decimal places asneeded.)b) The homeowner's friend lives in another region and wants tostudy the speeds, so the homeowner converts all the originalmiles-per-hour readings to kilometers per hour by multiplying allspeeds by 1.609 (km per mile). What is the mean now? What isthe new standard deviation?The mean speed is kph.The standard deviation iskph.(Type integers or decimals rounded to two decimal places asneeded.)

Answered: Image /qna-images/answer/9239373a-c1e2-4c21-9402-9ca2af3233b8.jpg

Answered: a) What is the mean speed now? What is…

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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In California, we need more rain to sustain the health of our natural environment, argriculture, and economic. A group of statistics students in Oxnard College recorded the amount of rain during 2016-2017 school year, measuring the intensity by the inches of rain, and the results were: Inches of Rain 2. 4 Frequency 4 4 3 1 3 The mean (T) rain intensity: inches (Please show your answer to 1 decimal place.) The median rain intensity: inches The mode rain intensity: inches (Please separate your answers by ',' in the bimodal situation. Enter DNE if there is no mode or if there are more than two modes.) Submit Question N 16 rch home ins prt sc delete 144
2. In 1990, there were 3,300 births in LaPorte County. In 2010, there were 4,200 births in that same county. (a) 2010. Round to the nearest whole number. Use the data above to compute the average rate of change in population from 1990 to Interpret the average rate of change found in part a in a complete sentence.
A recent Nielsen analysis found that the typical U.S. smartphone user is spending an average of 220 minutes per day using apps. We speculate that the average time spent using apps for Generation X smartphone users (aged 41-56 years) is less than the national average. The hypotheses are Ho: H = 220 minutes versus Ha: µ < 220 minutes. Summary results from R are provided. Summary Statistics Std. Dev (s) Mean Sample Size (n) 205 minutes 63.25 minutes 31
An elevator is loaded with 17 people and is at its load limit of 2520 pounds. What is the mean weight of these people? (Round your answer to one decimal place.)lb
Add the means and divide them by two for each pre-1945 and post-1945 and make an excel bar graph based off this data with error bars on graph
answer this with solution: The mean monthly salary of 26 male employees is 35,500 while that of 18 female employees is 44,100. Find the mean salary of all the respondents.
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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)
2.) Explain why the relative frequency column of a frequency table might not sum to 1.0.
The mean defined in the text is sometimes called the arithmetic mean to distinguish it from other possible means. For example, a different mean, called the geometric mean (G.M.), is used in business and economics for finding average rates of change, average rat growth, or average ratios. This mean is defined to be the nth root of the product of the numbers. For example, the geometric mean of 4, 5, and 6 is G.M. = (4 · 5 · 6)/3 V120 z 4.9. (a) Find the arithmetic and geometric means for the numbers 2, 4, 6, 7, 7, 8, and 10. (Round your answers to one decimal place.) arithmetic mean geometric mean (b) The growth rates for three cities are 1.5%, 2.1%, and 0.9%. Compare the arithmetic and geometric means. (Round your answers to two decimal places.) arithmetic mean % geometric mean %
Fahrenheit is the measurement of temperature commonly used in the US. On the Fahrenheit scale, water freezes at 32 F and boils at 212 F (at sea level). What is the data type and measurement scale of a dataset that records Fahrenheit temperature? a. Numerical and ratio b. Numerical and interva c. Categorical and ratio d. Categorical and ordinal

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