Suppose the age that children learn to walk is normally distributed with mean 12 months and standard deviation 1.3 month. 15 randomly selected people were asked what age they learned to walk. Round all answers to 4 decimal places where possible. What is the probability that one randomly selected person learned to walk when the person was between 11 and 13.5 months old?    For the 15 people, find the probability that the average age that they learned to walk is between 11 and 13.5 months old.    For part b, is the assumption that the distribution is normal necessary? NoYes   Find the IQR for the average first time walking age for groups of 15 people. Round to two decimal places. Q1 =  months Q3 =  months IQR:  months

Q: Tiger Woods hits an average driver 287.2 yards with a standard deviation of 24.6 yards. What is the…

A: The probability value is calculate by means of standard normal variate with the random variable,…

Q: .. Lori just bought a set of 4 tires for her car. The life of a tire is normally distributed with a…

A:

Q: A student takes a multiple choice exam with 10 questions, each with four possible selections for the…

A: Given that, A student takes a multiple choice exam with 10 questions, each with four possible…

Q: The mean number of eggs that a person consumes per year is 293.6 pieces. Assume that the standard…

A: The number of egg consume are normally distributed with a mean 293.6 and a standard deviation of…

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

A: Solution

Q: The length of human pregnancies from conception to birth varies according to a distribution that is…

A: Given that.   X~N( μ , ?)   μ=266     , ?=16   Z-score =( x - μ )/?

Q: The population average annual salary for high school teachers in Alhambra is $61,244. A random…

A:

Q: The weights of steers in a herd are distributed normally. The standard deviation is 300⁢lbs and the…

A:

Q: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

A: A baseball team has 31 players, 8 of whom bat left-handed. Suppose that the manager of this team is…

Q: Suppose, you play a game, and the result is simply "win" or "lose". For every 15 games played, you…

A:

Q: High school girls average 80 text messages daily. Assume the population standard deviation is 15…

A: Given information:

Q: IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What is the…

A:

Q: The weights of steers in a herd are distributed normally. The standard deviation is 200lbs. and the…

A: Let "X" be the weight of steers in a herd.

Q: The average number of pounds of red meat a person consumes each year is 196 with a standard…

A: We are given,μ = 196σ = 22n = 60

Q: On average, the fasting blood glucose for pregnant women is 80 with a standard deviation of 10. You…

A: Let X be the fasting blood glucose for pregnant women.Given, µ=80 and σ=10.

Q: A leading magazine reported at one time that the average number of weeks an individual is unemployed…

A: We have given that  X~N(mu,sigma ^2) mu=29 ,sigma =3.5 Z-socre =(x-mu)/sigma

Q: res light bulbs that have a length of life that is normally distributed with mean equal to 821 hours…

A:

Q: Provide all necessary computations and a properly labeled curve in asnwering the following. Sam…

A:

Q: A cell phone manufacturing company claims that their phone batteries last up to 48 hours without a…

A: Solution

Q: A final exam in Science 150  has a mean of 80 with a standard deviation of 8. If 25 students are…

A: Given: μ = 80 σ = 8 n = 25

Q: The time spent waiting in the line is approximately normally distributed. The mean waiting time is 5…

A: given data,normal distribution μ=5σ=3probability that person will wait more than 9 minutes =?

Q: IQ is normally distributed with a mean of 100 and a standard deviation of 15. Suppose one individual…

A: Let X = IQ of an individual.  The probability that the person has an IQ greater than 140.

Q: Assume that for the population of all unemployed individuals in Minnesota, the population mean…

A:

Q: A sample of 38 people are taken who who owns a red pair of shows. The std is 23 with an unlnown mean…

A: To determine the probability of making a type II error and the power, we need to know the level of…

Q: Assume that women's weights are normally distributed with a mean given by mean=143 lb and a standard…

A:

Q: For a certain group of individuals, the average heart rate is 74 beats per minute. Assume the…

A:

Q: How do I do this problem?

A: Solution: Let X be the IQ score. From the given information, X follows normal distribution with mean…

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

A:

Q: he lengths of pregnancies are normally distributed with a mean of 266 days and a standard deviation…

A:

Q: Find the probability that a single randomly selected salary that doesn't exceed 181000 dollars.…

A: The random variable X is defined as the salary for graduates which follows normal distribution with…

Q: Solve the problem. Assume that mountain lions' weights are normally distributed with a mean of 62.6…

A: We have given that,  X be the random variable from normal distribution with mean (μ) = 62.6 ,…

Q: 1.07 for all students who have ever attended the college. Find the probability a student at random…

A: Let X be the GPA of college students.Let us assume that X is normally distributed with mean 2.82 and…

Q: If there is an overall 120 movies, the mean is 109.408 And the standard deviation is 19.606. One of…

A: Approach to solving the question: Probability≈0.9963Sketch of Histogram: A histogram would represent…

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

A: Let X denote the IQ scores of adults. Given that X follows N(mean = 105, SD = 20), then Z = (X -…

Q: A professor knows that her statistics students' final exam scores have a mean of 79 and a standard…

A:

Q: Children between the ages of 2 and 5 watch an average of 25 hours of television per week. Assume the…

A: A normal distribution follows a bell shaped curve which is centred at the mean and it is also called…

Q: The number of bacterial colonies on a petri dish can have an average of 2.5 per cm2 Define the…

A: Given: The number of bacterial colonies on a petri dish can have an average of 2.5 per cm.

Q: If n=7 (days in a week) and p=0.45 (the probability that the food truck operates on a single day),…

A: Given information- Sample size, n = 7 The probability that the food truck operates on a single day…

Q: The air control informs the pilot of an aircraft about the altitude of the centre of the air…

A: Given problem Given that   The air control informs the pilot of an aircraft about the altitude of…

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

A: Mean()=105standard deviation()=15

Q: On a planet far far away from Earth, IQ of the ruling species is normally distributed with a mean of…

A: Given, the IQ of an individual of the ruling species follows normal distribution with mean 102 and…