5. The average length of time required for students to complete a test in an IntroductoryStatistics course is found to be 52 minutes with a standard deviation of 12 minutes. Ifstudents are allowed 60 minutes to complete the test, approximately what percentage of thestudents will have sufficient time to complete the test? (Assume that the time required tocomplete the test follows a normal distribution.)

Answered: 5. The average length of time required…

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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Newborn babies: A study conducted by the Center for Population Economics at the University of Chicago studied the birth weights of 752 babies born in New York. The mean weight was 3176 grams with a standard deviation of 840 grams. Assume that birth weight data are approximately bell-shaped. Estimate the number of newborns who weighed between 1496 grams and 4856 grams. Round to the nearest whole number. The number of newborns who weighed between 1496 grams and 4856 grams is
3. The distribution of test scores in a class is unimodal and symmetric with a mean of 80 pts and a standard deviation of 7pts. Based on the information, Adam estimated that his score is higher than approximately 97.5% of the students in class. What score did Adam receive? Explain.
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? b. Between what two values will the durations of 95% of all human pregnancies fall? Answer in days
Jeff is doing an experiment involving mice. The mice weights have mean weight 2.37 ounces and standard deviation 0.053 ounces. Jeff selects 9 mice independently and calculates the sample mean, x̄, of their weights. What is the standard deviation of x̄?
The systolic blood pressure of adults in the USA is nearly normally distributed with a mean of 121 and standard deviation of 16 .Someone qualifies as having Stage 2 high blood pressure if their systolic blood pressure is 160 or higher.c. Stage 1 high BP is specified as systolic BP between 140 and 160. What percentage of adults in the US qualify for stage 1?____%d. Your doctor tells you you are in the 30th percentile for blood pressure among US adults. What is your systolic BP? Round to 2 decimal places.____lbs
Suppose there is a city where the mean cost per month of a one-bedroom apartment is $1,500, with a standard deviation of $250. Approximately what percentage of one-bedroom apartments in the city cost between $750 and $1,000?
Jeff is doing an experiment involving mice. The mice weights have mean weight 3.74 ounces and standard deviation 0.026 ounces. Jeff selects 100 mice independently and calculates the sample mean, x̄, of their weights. What is the standard deviation of x̄?
In the class of 2019, more than 1.6 million students took the SAT. The distribution of scores on the math section (out of 800) is approximately normal with a mean of 528 and standard deviation of 117. What proportion of students earned scores between 500 and 600 on the SAT math test?
1. Among American women aged 20 to 29 years, 10% are less than 60.8 inches tall, 80% are between 60.8 and 67.6 inches tall, and 10% are more than 67.6 inches tall. Assuming that the height distribution can adequately be approximated by a normal curve, find the mean and standard deviation of the distribution.
3. A researcher collected the wait times at the Department of Motor Vehicles for 5 days. The data are normally distributed with a mean of 73 minutes and a standard deviation of 15.6 minutes. What percentage of patrons had a wait time between 45 and 60 minutes? Standard Normal Table GeoGebra Graphing Calculator A.16.7% B.20.3% C.83.3% D.3.7%
Scaffold 2: In ajob fair, 3000 applicants applied for a job. Their mean age was found to be 28 with a standard deviation of 4 years. a. Draw a normal curve distribution showing the z-scores and the raw scores. b. How many applicants are below 20 years old?
Q) The RATES of a SWEET BOX follows a normal distribution with a mean of $2.20 and a standard deviation of $0.20. Find the RATE for which 10.23% of sweet boxes are exceeded. Round your answer to nearest cent (hundredth) if necessary.

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