The time to complete an exam is approximately Normalwith a mean μ = 47 minutes and a standard deviation o =8 minutes.The bell curve below represents the distribution fortesting times. The scale on the horizontal axis is equal tothe standard deviation.1. Fill in the indicated boxes.μ-3σ μ-2ο μίσ+μ μ+o47minutes.2. Used the Empirical Rule to complete the followingstatements:95% of testing times were betweenandμ = 47σ = 8μ+20 μ+30minutes and 55 minutes.minutes% of the testing times were between 39

Answer:- Given, The time to complete an exam is approximately Normal with a mean µ = 47 minutes and…

Answered: The time to complete an exam 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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A coffee vending machine is adjusted so thatthe quantity of beverage poured is a normal variable ofaverage 200 ml. You buy 15 cups of coffee and you noticethat the average volume is 195 ml with a standard deviationof 2.3 ml. Can you file a complaint against the ownerof this machine for the lack of coffee in your glasses?Test at the 5% level.
The blood pressure in millimeters was measured for a large sample of people. The average pressure is 140 mm, and the SD of the measurements is 20 mm. The histogram looks reasonably like a normal curv Use the normal curve to estimate the following percentages. Choose the answer that is closest to being correct. A 19.1% B 30.9% C 38.2% D 69.1% E 68.27% A The percentage of people with blood pressure between 130 and 150 mm. B The percentage of people with blood pressure between 140 and 150 mm. D The percentage of people with blood pressure over 150 mm.
The mean is 146 and the standard deviation is 35. A score of 41 is how many z-scores below the mean?
Find the following percentile and percentile ranks for a normal distribution with a mean of ? =120and? =15. The percentile rank for X = 102 The percentile rank for X = 120 The interquartile range
The distribution of heights in a population of women is approximately normal. Sixteen percent of the women have heights less than 62 inches. About 97.5% of the women have heights less than 71 inches. Use the empirical rule to estimate the mean and standard deviation of the heights in this population. Mean: K inches Standard Deviation: inches
A bottler of drinking water fills plastic bottles with a mean volume of 994 millimeters (mL) with a standard deviation of 5 mL. The fill volumes are normally distributed. What proportion of bottles have volumes less than 995 mL? Use Table A.2 (Normal Distribution Table) and keep four decimal places with your answer.
This assignment is worth 1 points. The extra point will be added to your overall course grade. For example: if you receive an 88% in the course you can receive up to 1 point giving you a new score of 89%. The following rubric will be used. 0.25 point for drawing the normal distribution curve with the mean value labeled on the curve and the appropriate area shaded. 0.25 point for determining the value of the standard deviation of the sample mean. 0.5 point for finding the correct probability. All work must be shown in order to receive any credit. Please upload your completed assignment here. The length of time taken on the SAT for a group of students is normally distributed with a mean of 2.5 hours and a standard deviation of 0.25 hours. A sample size of n = 60 is drawn randomly from the population. Find the probability that the sample mean is between two hours and three hours.
Find the percent of area under a normal curve between the mean and the given number of standard deviations from the mean. (Note that positive indicates above the mean, while negative indicates below the mean.) -0.40 % (Round to the nearest tenth as needed.)
Returning to the sample of adult women, with a sample mean height of x¯=64.3 inches and sample standard deviation of s=2.4 inches, use the Empirical Rule to estimate the percentage of heights that are less than 61.9 inches. Round your answer to the nearest whole number (percent).
Please give me correct solution and explain.
Use the Empirical Rule. The mean speed of a sample of vehicles along a stretch of highway is 68 miles per hour, with a standard deviation of 3 miles per hour. Estimate the percent of vehicles whose speeds are between 65 miles per hour and 71 miles per hour. (Assume the data set has a bell-shaped distribution.) Approximately nothing% of vehicles travel between 65 miles per hour and 71 miles per hour.
Use the Z-score formula given below Zscore=data - mean standard deviation It has been determined that the mean task completion times for making fan belts at an auto parts manufacturing facility is 30 minutes. The times are normally distributed with a standard deviation of 2 minutes; a. What percent of belts will take less than 33 minutes to produce? b. What percent of fans will take more than 29 minutes to produce?

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