Fifteen randomly selected women were asked to workout on a stair-master for three minutes. After the three minutes,their pulse rates were measured and were found to have a mean of 108 with a standard deviation of 12.8.Compute a 99% confidence interval for the mean pulse rate of the population. Assume the population is normal.O A. 99 < u < 117O B. 98 < u < 118Oc. 101 < p < 115O D. 103 < p < 115QUESTION 4A study of 40 English composition professors showed-that they spent, on average, 12.6 minutes correcting a student'sterm paper with a standard deviation of 2.5 minutes.Compute a 90% confidence interval for the mean time spent by a professor grading a composition paper.O A. 12.0 < µ< 13.2O B. 11.7 <µ < 13.5O C. 11.8 <µ < 13.4Save All AnswerClick Save and Submit to save and submit. Click Save All Answers to save all answers.LEGO44°FP Type here to search6 A A10/05/17EscF1F2**F12F3F4F5F6F7PrtScInsertDeleteF8F9F10F11&234567080BackspTabTYU+ I/23w/

a) Given : Sample Size, n = 15 Sample Mean, x̄ = 108 sample…

Answered: Fifteen randomly selected women were…

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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A random sample of 110 cars in the drive-thru of a popular fast food restaurant revealed that the average bill of $16.78 per car. Find the average bills for all cars from the drive-thru with 94% confidence. The standard deviation of the selected cars is $2.74.
A data obtained from a random sample has mean 68 and standard deviation 35. The value whose Z-score is 1.4 is Select one: O a. 69.4 O b. 19 O c 17
Assume that adults have IQ scores that are normally distributed with a mean of 98.4 and a standard deviation 20.5. Find the first quartile Upper Q 1 , which is the IQ score separating the bottom 25% from the top 75%. a. The first quartile is (Type an integer or decimal rounded to one decimal place as needed.)
How large of a sample is required for a to construct a 99% confidence interval around a mean with an error of less than 1.5. Assume the standard deviation is 42.
A random sample of n measurements was selected from a population with unknown mean p and known standard deviation o. Find the margin of error (often denoted as E or EBM) for a 95% confidence interval for u for the given situation. Round to the nearest hundredth when necessary. n = 104, x = 174, o = 11
An IQ test is designed so that the mean is 100 and the standard deviation is 10 for the population of normal adults. Find the sample size necessary to estimate the mean IQ score of statistics students such that it can be said with 99% confidence that the sample mean is within 8 IQ points of the true mean. Assume that σ=10 and determine the required sample size.
number 28 The following data shows the price of a certain stock over the last 8 months. Month Price 1 2.10 2 1.98 3 2.01 4 1.89 5 1.90 6 1.89 7 1.72 8 1.65 (a) Develop a scatter diagram and draw a trend line through the points. A graph has a horizontal axis labeled "Month" with values from 0 to 10 and a vertical axis labeled "Price" with values from 0 to 2.5. The scatter diagram has 8 points. A line goes through the center of the pattern of points. A pattern goes down and right becoming more steep from (1, 1.7) to (8, 1.25). A graph has a horizontal axis labeled "Month" with values from 0 to 10 and a vertical axis labeled "Price" with values from 0 to 2.5. The scatter diagram has 8 points. A line goes through the center of the pattern of points. A pattern goes down and right from (1, 2.1) to (8, 1.65). A graph has a horizontal axis labeled "Month" with values from 0 to 10 and a vertical axis labeled "Price" with values from 0 to 2.5. The scatter…
Assume that different groups of couples use a particular method of gender selection and each couple gives birth to one baby. This method is designed to increase the likelihood that each baby will be a girl, but assume that the method has no effect, so the probability of a girl is 0.5. Assume that the groups consist of 48 Find the mean and the standard deviation for the numbers of girls in groups of 48 births. The value of the mean is μ=?
Suppose a randomly selected sample of n = 69 men has a mean foot length of x = 28.3 cm, and the standard deviation of the sample is 3 cm. Calculate an approximate 95% confidence interval for the mean foot length of men. (Round the answers to one decimal place.) to cm
There are frogs and koi in a pond, and the number of frogs and the number of koi in the pond are independent. Let X represent the number of frogs in any given week, and let Y represent the number of koi in any given week. X has a mean of 28 with a standard deviation of 2.7, and Y has a mean of 15 with a standard deviation of 1.6. Which answer choice correctly calculates and interprets the standard deviation of the difference, D = X - Y? = 1.05; this pond can expect the difference of frogs and koi to vary by approximately 1.05 from the mean. = 1.1; this pond can expect the difference of frogs and koi to vary by approximately 1.1 from the mean. = 3.1; this pond can expect the difference of frogs and koi to vary by approximately 3.1 from the mean. = 13; this pond can expect the difference of frogs and koi to vary by approximately 1.05 from the mean.

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