If you wanted to be 99% confident that your estimate of theaverage Florida rainfall was within 3 inches of the true average, howmany places in Florida should you survey? Use a standarddeviation of 9 inches per year.(i) What would be the z* critical value required to answer thequestion? [Select ](ii) What is the answer to the question: how many places in Floridashould you survey? [ Select ] The data for this exercise was obtained fromhttps://www.currentresults.com/Weather/Florida/yearly-florida-rainfall.php 2 .Tourists often hear about the wonderful, warm Florida weather; they live inblissful ignorance of the freezes experienced in the northern parts of thestate. A tourism organization wants to open up the entire state to tourists.They know that not everyone is drawn to hot, sunny beaches, so they wantto advertise the advantages of visiting other parts of the state. One of thefirst things they need to do is educate potential tourists about the weather.And part of that involves informing them about the average rainfall acrossthe state. Your task is to help the tourism organization figure out what theaverage rainfall in Florida is like. Rainfall data is provided below.The table below gives the typical yearly rainfall in some parts of Florida.PlaceRainfall(inches per year)Monticello56.8Niceville71.0Tampa46.3Lakeland54.8St. AugustineLake City49.052.650.8OcalaKey West39.8Hialeah70.4Everglades Park, Royal PalmTavernier (Key Largo)55.046.0West Palm Beach62.3

Given, Margin of Error ∈=3 Standard deviationσ=9 and ∝=1-0.99 ∝=0.01…

If you wanted to be 99% confident that your estimate of the average Florida rainfall was within 3 inches of the true average, how many places in Florida should you survey? Use a standard deviation of 9 inches per year. (i) What would be the z* critical value required to answer the question? [ Select ] (ii) What is the answer to the question: how many places in Florida should you survey? [ Select]

If you wanted to be 99% confident that your estimate of the average Florida rainfall was within 3 inches of the true average, how many places in Florida should you survey? Use a standard deviation of 9 inches per year. (i) What would be the z* critical value required to answer the question? [ Select ] (ii) What is the answer to the question: how many places in Florida should you survey? [ Select]

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 frequency distribution was obtained using a class width of 0.5 for data on cigarette tax rates. Use the frequency distribution to approximate the population mean and population standard deviation Compare these results to the actual mean µ = $1.667 and standard deviation o=$1.073. Click the icon to view the frequency distribution for the tax rates. The population mean is $ (Round to three decimal places as needed) The population standard deviation is $ (Round to three decimal places as needed.) Compare these results to the values found using the actual data. OA. The grouped values are both slightly larger. OB. The grouped values are both slightly smaller. OC. The grouped mean is slightly larger, while the grouped standard deviation is slightly smaller. OD. The grouped mean is slightly smaller, while the grouped standard deviation is slightly larger. Frequency distribution of cigarette tax rates Tax Rate 0.00 0.49 0.50-0.99 1.00-1.49 1.50-1.99 2.00-2.49 2.50-2.99 3.00-3.49 3.50-3.99…
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The scores on a psychology exam were normally distributed with a mean of 56 and a standard deviation of 4. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? ..... The cutoff for a failing score was 49 (Simplify your answer.) Approximately 2.28 percent of the students failed. (Round to one decimal place as needed.)
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 39 beats per minute, the mean of the listed pulse rates is x overbar equals 77.0 beats per minute, and their standard deviation is sequals 21.2 beats per minute. a. What is the difference between the pulse rate of39 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of39 beats per minutes to a z score. d. If we consider data speeds that convert to z scores between minus 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 39 beats per minute significant?
A survey was taken in a college class asking how many people lived in each student's household, with the sample data collected as numbers of people and frequencies. The data collected is given in the table below. Number of People (x) Number of Respondents in Survey (f) 1 3 2 6 3 16 4 4 Calculate the standard deviation of the above sample table of frequencies: Round your answer to 2 decimal places and be sure to use the correct formula.
Sofia wants to determine the average household expenditure on lawn care products per year. She believes that the standard deviation is 19.2. She wants to be 95% confident. How many people does she need to ask for a margin of error of $2.50? Round the answer as you should for this type of problem.(Don't worry if Canvas adds extra zeros after the decimal.)
Jamie would like to estimate the mean amount households in the small town of Ringwood spend on rent/mortgage per month. She wants her estimate to be within $25 off the population mean with 95% confidence. If she is willing to assume the population standard deviation is $288, how many households must she sample?
A student studying statistics wants to look at data for his favorite sport, American football. He collects data on the lengths of 100 field goals from various games over several seasons. Would it be more appropriate to find a sample standard deviation or population standard deviation in this situation? Select the correct answer below: A. Sample standard deviation B. Population standard deviation
In a data set with a mean of 28 and standard deviation of 6, what is the value of the standard unit for an observation of 19? (This is also sometimes called a z-score.) Use 2 decimal places in your answer. Your Answer:
For a data set of the pulse rates for a sample of adult females, the lowest pulse rate is 39 beats per minute, the mean of the listed pulse rates is x = 78.0 beats per minute, and their standard deviation is s = 13.1 beats per minute. %3D a. What is the difference between the pulse rate of 39 beats per minute and the mean pulse rate of the females? b. How many standard deviations is that [the difference found in part (a)]? c. Convert the pulse rate of 39 beats per minutes to a z score. d. If we consider pulse rates that convert to z scores between - 2 and 2 to be neither significantly low nor significantly high, is the pulse rate of 39 beats per minute significant? a. The difference is beats per minute. (Type an integer or a decimal. Do not round.)
Estimate the absolute standard deviation and the coefficient of variation for the results of the following calculations. Round each result to include only significant figures. The numbers in parentheses are absolute standard deviations. y = 1.09(+0.02) x 10-8-3.60(0.2) × 10-⁹ a. Absolute standard deviation = Coefficient of variation - Result = b. y = Absolute standard deviation = Coefficient of variation = Result = % 1.49(0.02) x 10-24.97(10.06) × 10-³ 27.1(0.7)+8.99 (+0.08) %
Can you assist me in answering this? (this is not graded but, rather, an excersice conducive to acquisition).