A random variable of 400 samples has a normal distribution with a mean of 54.2 and standard deviation of 4.8. What is the probability (in percent) that this variable will take on a value less than 63? How many samples are there if these variables are between 47 and 58? What will be the z-score if the variable is 65? for your answers: "must be up to 2 decimal places "must not contain the % sign lex: 76.89)

A random variable of 400 samples has a normal distribution with a mean of 54.2 and standard deviation of 4.8. What is the probability (in percent) that this variable will take on a value less than 63? How many samples are there if these variables are between 47 and 58? What will be the z-score if the variable is 65? for your answers: "must be up to 2 decimal places "must not contain the % sign lex: 76.89)

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

The mean weight of all Goliath grouper caught on the Treasure coast is 377 pounds, with a standard deviation of 72 pounds. Suppose a random sample of 37 Goliath Grouper from the Treasure Coast are caught and weighed. Determine the probability that the average weight of the sample of 37 Goliath Grouper is within 31 pounds of the average weight of all Goliath Grouper caught on the Treasure Coast. Round the solution four decimal places, if necessary.
Mario's weekly poker winnings have a mean of $353 and a standard deviation of $67. Last week he won $185. How many standard deviations from the mean is that?
Nabisco claims that Chip Ahoy Cookies have an x ̅=28.67 chocolate chips per cookie with a SD=2.67. You randomly select 36 cookies from a new bag and carefully remove all the chocolate chips from each of the 36 cookies. You find the mean of the chocolate chips for the 36 cookies is 24.27 chocolate chips per cookie. Calculate the standard error for the chocolate chips in your experiment. (round to the nearest hundredth).
Find the mean and standard deviation of the number of red-headed Scots in a randomly selected group of 155. The probability of having red hair is still 13% for Scottish people. a. Mean = b. Standard deviation (Round to 2 places)=
JA researcher takes an SRS of 80 people who go golfing.The average to be u52 years old. It was also determined that the standard deviation of cac ot golfers was la What is the probability that the sample mean is kss. than 47 years old? age of all golferswas determined years.
In a random sample of ten cell phones, the mean full retail price was $554.00 and the standard deviation was $167.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean u. Interpret the results. Identify the margin of error. (Round to one decimal place as needed.)
A person’s IQ must be in the upper 2% of the population to be considered into the Honor Society. If the mean score is 100 and the standard deviation is 15, what score must a person have to qualify for the Honor Society?
A successful basketball player has a height of 6 feet 11 inches, or 211 cm. Based on statistics from a data set, his height converts to the z score of 5.17. How many standard deviations is his height above the mean?
1) After 5 pts were added to every score in a sample the mean is found to be 62 and the standard deviation is 12. What were the values for the mean and SD before the change? Explain
Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard deviation of 15. Find P40, which is the IQ score separating the bottom 40% from the top 60%. Round your answer to nearest tenth.
A pupil in grade 2 jumped 3.2 m for the long jump. The class mean is 2.5 m with a standard deviation of 0.4 m. A pupil in grade 8 at the same school jumped 4.3 m in a class with a mean of 3.4 m and a standard deviation of 0.5 m. Which student should receive the long jump medal for the school track meet?
Can you please assist ?