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 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.)
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
A study of parental empathy for sensitivity cues and baby temperament (higher scores mean more empathy) was performed. Let x1 be a random variable that represents the score of a mother on an empathy test (as regards her baby). Let x2 be the empathy score of a father. A random sample of 40 mothers gave a sample mean of x1 = 68.36. Another random sample of 36 fathers gave x2 = 57.34. Assume that ?1 = 11.83 and ?2 = 11.72. (a)Let ?1 be the population mean of x1 and let ?2 be the population mean of x2. Find a 99% confidence interval for ?1 – ?2. (Round your answers to two decimal places.) lower limit=__ upper limit=__
A sample of size 126 will be drawn from a population with mean 26 and standard deviation 3. Use the TI-84 calculator. Part 1 of 2 Find the probability that x will be between 25 and 27. Round the answer to four decimal places. The probability that x will be between 25 and 27 is Part 2 of 2 th Find the 55 percentile of X. Round the answer to two decimal places. The 55th percentile is
The percent of fat calories that a person in America consumes each day is normally distributed with a mean of about 38 and a standard deviation of 9. Suppose that one individual is randomly chosen. Let X-percent of fat calories. a. What is the distribution of X? X - N( b. Find the probability that a randomly selected fat calorie percent is more than 44. Round to 4 decimal places. c. Find the minimum number for the upper quartile of fat calories. Round to 2 decimal places.
Assume that adults have IQ scores that are normally distributed with a mean of 102.9 and a standard deviation 19.4. Find the first quartile Q,, which is the IQ score separating the bottom 25% from the top 75%. (Hint: Draw a graph.) The first quartile is Type an integer or decimal rounded to one decimal place as needed.)
From a sample with n = 12, the mean number of televisions per household is 2 with a standard deviation of 1 television. Using Chebychev's Theorem, determine at least how many of the households have between 0 and 4 televisions. At least of the households have between 0 and 4 televisions. (Simplify your answer.)
The average life span of one particular brand of refrigerator is 12 years with a standard deviation of 0.8. Find the percentage of the refigerators that last between 10 and 14.5 years. O 99.3% 99.9% 95.9% 97.8% ▶
2. Scored obtained by a large group of students taking a test are known to be normally distributed. A random sample of twenty-five students test scores yielded the following statistics: 25 と=1Xi 25 1508 x - 95628 Find a 95% confidence interval for the population mean.
The scores of a certain population on the Wechsler Intelligence Scale for Children (WISC) are thought to be normally distributed with mean mu and standard deviation o = sample of twenty-five children from this population is taken and each is given the WISC. The mean 10. A simple random of the twenty-five scores is x = 104.32. The 95% confidence interval for mu is O 104.32 + 0.78. O 104.32 t 3.29. O 104.32 + 3.92. O 104.32 ± 19.60

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