Pandora, the owner of a food delivery app, knows from experience that the time needed to assemble a fooddelivery is normally distributed with a mean of 30 minutes and standard deviation of 5 minutes.a. Find the proportion of food deliveries that took less than 20 minutes to assemble.[ Select]b. Find the proportion of food deliveries that took more than 37 minutes to assemble.[ Select]c. Below how many minutes would you find the fastest 15 % of food assembly times? (i.e., find k such thatP(food assembly time

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Answered: Pandora, the owner of a food delivery…

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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Suppose the durations of human pregnancies follow a mound-shaped distribution with a mean of 266 days and a standard deviation of 18 days. a. Approximately what percentage of human pregnancies last between 248 and 284 days?
Consider the five-number summary of hourly wages ($) for a sample of sales managers. Min: 20.94 Q1: 37:64 Median: 77 Q3: 49.34 Max: 67.11 What is the IQR?
Suppose a government department would like to investigate the relationship between the cost of heating a home during the month of February in the Northeast and the home's square footage. The accompanying data set shows a random sample of 10 homes. Construct a 90% prediction interval to estimate the cost in February to heat a Northeast home that is 3,100 square feet. Click the icon to view the data table. Determine the upper and lower limits of the prediction interval. UPL = $ LPL = $ (Round to two decimal places as needed.) Data table Heating Cost ($) 320 300 300 250 320 Square Footage 2,430 2,430 2,030 2,220 2,350 Print Heating Cost ($) 440 320 400 340 360 Square Footage 2,640 2,210 3,120 2,520 2,950 Done X
Suppose that we know that 33.8% of the people born in the United States between 1936 and 1951 have BLUE eyes. Three randomly selected Americans are selected and examined for eye color. If you let success correspond to an American having BLUE eyes, calculate the following. Calculate the standard deviation.
In a Science test, the mean is 46 and the standard deviation is 4. Assuming the scores are normally distributed. What percent of the score is greater than 48? Select one: 3.085% 29.85% 30.85% 2.985%
Solve the problem.Assume that mountain lions' weights are normally distributed with a mean of 62.6 kilograms and a standard deviation of 2.6 kilograms. If 70 mountain lions are randomly selected, find the probability that they have a mean weight between 61.9 kilograms and 62.8 pounds.
Suppose that prices of a certain model of new homes are normally distributed with a mean of $150,000. Find the percentage of buyers who paid between $148,200 and $151,800 if the standard deviation is $1800. Group of answer choices 99.7% 34%
Use a normal distribution table or a statistical calculator to answer this question. A farm produces 10,000 eggs in a day. The mean mass of an egg is 59 grams. The standard deviation is 5 grams. An egg is "extra-large" if it has a mass between 63 and 69 grams. To the nearest ten eggs, how many extra-large eggs does the farm produce in a day?
Identify the data value corresponding to the indicated percentile. The amount of sleep an adult gets per day is normally distributed with a mean of 7 hours and a standard deviation of 1.5 hours. Five percent of adults sleep more than how many hours per day?
As part of a study, 800 college football players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 235 pounds and the standard deviation is 25 pounds. Approximately how many players had weights between 260 pounds and 285 pounds? Select one: a. 432 b. 108 C. none of these d. 216 400 e.
Which data set would give the smallest standard deviation? Select one: a. {100, 150, 200, 250, 300} O b. {1, 5, 7, 150, 2} O c. {4, 20, 55, 100, 2} O d. (56, 20, 34, 102, 30}
Suppose that the value of a stock varies each day from $8.82 to $16.17 with a uniform distribution. Find the third quartile; 75% of all days the stock is below what value?

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