The average number of words in a romance novel is 64,315 and the standard deviation is 17,381. Assume the distribution is normal. Let X be the number of words in a randomly selected romance novel. Round all answers to 4 decimal places where possible b Find the probability that the college graduate has between $10,000 and $19,350 in student loan debt. c. The middle 10% of college graduates' loan debt lies between what two numbers? Low: $ High: $

Q: A distribution of exam scores has a population mean of 90 and a population standard deviation of 10.…

A:

Q: If the grades are normally distributed and 8 students received a B, how many students took the…

A: Let C denote the grades of students. Given that X follows N(mean = 82, SD = 5), then  Z = (X -…

Q: At the end of the semester a professor wants to organize student’s grades by how many students…

A: Given data, At the end of the semester a professor wants to organize student’s grades by how many…

Q: ss, the scores on a test are normally distributed. The middle 68% of the scores fall between 74 and…

A: According to the empirical rule, approximately 68% of the observations fall within 1 standard…

Q: Ahmed receives a weekly salary of $250, plus an additional $300 for each car sold. Find the mean and…

A: Salary=250 and 300 additional for each car sold. Salary = 250 + x*300  x = number of car sold

Q: The mean and S.D. of income of 50 men are Rs. 3200 and Rs. 525 respectively The same for 40 women…

A: Formula for S.D for combined group: σ12=n1(σ12+d12)+n2(σ22+d22)n1+n2          Combined mean is,…

Q: In an examination in Statistics, the mean grade is 72 and the standard deviation is 6. Find the…

A: Given that ; Population mean (u) = 72 Standard deviation = 6  By using standard normal distribution…

Q: A couple plans to have 14 children. Assume that girl and boy births are equally likely. Find the…

A: A couple plans to have 14 children. Assume that girl and boy births are equally likely.

Q: Q2. Find the standard deviation for the data: 5,10,7,12,0,20 7

A: We have to find the standard deviation for the data: 5,10,7,12,0,20

Q: On a nationwide math test, the mean was 52 and the standard deviation was 4. If Roberto scored 85,…

A: The z score formula is,

Q: Find the mean and median of the class’s scores on this quiz. Round to two decimal places when needed

A: Given that  From histogram  X-axis takes X values and Y-axis takes Frequency  X Frequency = f 1…

Q: The sick leave time of employees in a firm in a month is normally with a mean of 100 hours and a…

A: Let X be a continuous random variable of employees sick leave time in a firm in month (in hours) is…

Q: Place the following in order to show how you find the standard deviation. Take the square root of…

A:

Q: The average high temperature in Anchorage, AK in June is 63°F with a standard deviation of 1.6°F.…

A:

Q: Find the z-score for which 99% of the distribution's area lies between -z and z. Click to view page…

A: The objective is to find the z-score for 99% of the distributions area lie between –z and z.   That…

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: Given: The middle 68% of the scores are falling between 70 and 84.

Q: find the mean if Z-score =14, st.Dev.=2.5, for a score of 8.5

A: Standard normal distribution:The standard normal distribution is a special case of normal…

Q: Assume that adults have IQ scores that are normally distributed with a mean of 100 and a standard…

A:

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A:

Q: Find the area of the shaded region. The graph to the right depicts IQ scores of​ adults, and those…

A: Given,mean(μ)=100standard deviation(σ)=15

Q: THE FF. WERE THE RESULTS OF THE EXAMINATION CONDUCTED FOR GRADUATING STUDENTS. FIND THE STANDARD…

A: From the provided information, The frequency distribution table is as follow: Score interval f…

Q: Psychology students at a university completed the Dental Anxiety Scale questionnaire. Scores on the…

A: Given that, mean = μ=12, and standard deviation =σ=3.5

Q: Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The…

A: The standard deviation of students lab measurements is 8. Juan repeats the measurement 2 times. That…

Q: A couple plans to have 5 children. Assume that girl and boy births are equally likely. Find the…

A:

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: The random variable score X is normally distributed and middle 68% of values fall between 71 and 83…

Q: find mean if n=20 and p=0.2

A:

Q: ndard deviation is sample of 45 indiv

A: a) The average number of kilos of meat is 90 and SD is 10μ=90σ=10n=45b) The average number of kilos…

Q: Assume that adults have IQ scores that are normally distributed with a mean of u 105 and a standard…

A: Given that, Mean = 105 and Standard deviation = 15

Q: he table shows kayden's quiz score for a semester. What are the mean and the standard deviation,…

A:

Q: The average number of kilos of meat a person consumes in a year is 110 kilos. Assume that the…

A: 1)GivenMean(μ)=110standard deviation(σ)=12sample size(n)=45

Q: tain population, the mean score on a test is 420.  The standard deviation is 105. If the…

A: a. The z score can be calculated as: z=X-uσ=385-420105=-0.333 b. The z score can be calculated as:…

Q: In an Algebra class, the scores on a test are normally distributed. The middle 68% of the scores…

A: Given : The middle 68% of the scores fall between 71 and 79 P(71<X<79)=68%

Q: The distances golf balls travel under laboratory testing conditions are normally distributed. The…

A: Given,mean(μ)=312P(X>319)=0.28

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.