The length of pregnancies of humans has a mean of 265 days and a standard deviation of 10 days.(a) What is the value for k for the length of pregnancies in the interval between 250 and 280 days?At least what percentage of pregnancies is between 250 and 280 days? (Round your answer to one decimal place.)%(b) At least what percentage of pregnancies is between 247.5 and 282.5 days? (Round your answer to one decimal place.)%

Mean length of pregnancies of humans ( ) = 265 daysStandard deviation of length of pregnancies ( )…

Answered: The length of pregnancies of humans has…

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 each part, use the information given to calculate the standard error of the mean. (Round your answers to one decimal place.) (a) Mean height for a sample of n = 99 women is x = 65.6 inches, and the standard deviation is s = 3.9 inches.inches(b) Mean systolic blood pressure for a sample of n = 120 men is x = 124.5, and the standard deviation is s = 7.(c) Mean systolic blood pressure for a sample of n = 360 men is x = 124.5, and the standard deviation is s = 7.
Use the above picture to anwer these questions. If we count off 2.5% of the dots in the LEFT tail, above what number on the number line will that dot be located? If we count off 2.5% of the dots in the RIGHT tail, above what number on the number line will that dot be located? Using the 95% Rule, estimate the standard error. Round your answer to four decimal places as necessary. (Hint: It is NOT the standard deviation given in the picture. That represents the standard deviation of just the dots in the picture. The standard error would be the standard deviation of the dots in the picture if it included every possible bootstrap sample. But that picture would contain 10,000,000,000 dots
How much do wild mountain lions weigh? Adult wild mountain lions (18 months or older) captured and released for the first time in the San Andres Mountains gave the following weights (pounds):66 110 132 124 60 64(a) Use a calculator with mean and sample standard deviation keys to find the sample mean weight x and sample standard deviation s. (Round your answers to four decimal places.)x = _____lbs = _____lb (b) Find a 75% confidence interval for the population average weight ? of all adult mountain lions in the specified region. (Round your answers to one decimal place.)lower limit = ____lbupper limit = ____lb
Find the indicated IQ score. The graph to the right depicts IQ scores of adults, and those scores are normally distributed with a mean of 100 and a standard deviation of 15. 0.1931 The indicated IQ score is 113. (Round to the nearest whole number as needed.)
the mean = 146, and s = 35 Question #4 A score of 181 is how many z-scores above the mean?
A pair of dice is rolled 210 times. What is the probability that a total of 7 occurs (a) at least 24 times? (b) between 38 and 48 times inclusive? (c) exactly 35 times? Click here to view page 1 of the standard normal distribution table. Click here to view page 2 of the standard normal distribution table.
How do you solve?
For the first half of a baseball season, a player had 85 hits out of 270 times at bat. The player's batting average was 85 270 ≈ 0.315. During the second half of the season, the player had 56 hits out of 275 times at bat. The player's batting average was 56 275 ≈ 0.204. (Round your answers to three decimal places.) (a) What is the average (mean) of 0.315 and 0.204?(b) What is the player's batting average for the complete season?(c) Does the answer in part (a) equal the average in part (b)? YesNo

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