12 dice were thrown 6500 times, 4, 5 or 6 being reckonedas a "success". What proportion of success do youexpect? If, in actual observation, the proportion ofsuccess is found to be 0.5016, find the standard deviationof the proportion with the given number of throws andstate whether you would regard the excess of successesas probably significant of bias in the dice.

introduction In the problem we have to find out the standard deviation of the proportion with the…

Answered: 12 dice were thrown 6500 times, 4, 5 or…

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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Please answer number 3
A. If 75% of high school students are able to pass a stats test, find the mean, variance, and standard deviation for the number of students who pass the test in a sample of 150 students. B. What is the probability that just you will not pass this test, if all 22 students take the test?
From candy to jewelry to flowers, the average consumer was expected to spend $104.63 for Mother’s Day in 2005, according to a Democrat & Chronicle article. Local merchants thought this average was too high for their area. They contracted an agency to conduct a study. A random sample of 60 consumers was taken at a local shopping mall the Saturday before Mother’s Day and produced the sample mean amount of $94.27. If σ = $29.50, does the sample provide sufficient evidence to support the merchants’ claim at the 0.03 level of significance? 1. Do you recognize any flaws in this study and what conclusions can you draw? The article “Well-fed Crickets Bowl Maidens Over” reports that female field crickets are attracted to males that have high chirp rates and hypothesized that chirp rate is related to nutritional status. The usual chirp rate doe male field crickets was reported to vary around a mean of 60 chirps per second. To investigate whether chirp rate was related to nutritional…
One year, the distribution of salaries for professional sports players had mean $1.6 million and standard deviation $0.81 million. Suppose a sample of 100 major league players was taken. Find the approximate probability that the average salary of the 100 players that year exceeded $1.7 million. Round your answer to nearest ten-thousandth.
Suppose that the distance of fly balls hit to the outfielder ( in baseball) is normally distributed with a mean of 250 feet and a standard deviation of 50 feet. We randomly sample 49 fly balls.a. In words define the random variable. X________.b. What is the probability that the 49 balls traveled an average at least of 240 feet. Include a complete shaded graph, and write the probability statement. c. Find the 90th percentile of the distribution of the average of 49 fly balls.
Cody took his first physics exam and scored an 80. The population mean for this exam is 70, and the standard deviation is 5. What is the probability of selecting a person with a score greater than Cody’s?
Jodie's Ice Cream Stand sells cones at the beach. Her records show that she sells a mean of 180 cones each day, with a standard deviation of 15 cones, distributed normally. She would like to keep the probability of running out of cones below 1%. How many cones should she stock each day?
3. After being nominated for an MTV Music Award, the probability of winning is 22%. If Ariana Grande has been nominated for five awards, what is the chance that she will win at least one award? How many awards should she expect to win? What is the standard deviation associated with this probability?
Imagine the mean women’s foot size is a 7.5 with standard deviations of 1.5. a. What percentage of women have a foot size larger than 10? b. If you select 30 people at random is it likely that any of them will have a foot size larger than 10? If so, how many?
In the 1992 presidential election, Alaska's 40 election districts averaged 2056 votes per district for President Clinton. The standard deviation was 581. (There are only 40 election districts in Alaska.) The distribution of the votes per district for President Clinton was bell-shaped. Let X = number of votes for President Clinton for an election district. (Source: The World Almanac and Book of Facts) Round all answers except part e. to 4 decimal places.c. Find the probability that a randomly selected district had fewer than 2103 votes for President Clinton. d. Find the probability that a randomly selected district had between 2138 and 2245 votes for President Clinton. e. Find the first quartile for votes for President Clinton. Round your answer to the nearest whole number.
b. What is the median giraffe height? ft. c. What is the Z-score for a giraffe that is 19 foot talL? d. What is the probability that a randomly selected giraffe will be shorter than 18.7 feet tall? e. What is the probability that a randomly selected giraffe will be between 19 and 19.8 feet tall? f. The 85th percentile for the height of giraffes is ft.

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