1. Suppose the mean life span of a randomly selected Chihuahua dog is normally distributed with a mean of 13 years and a standard deviation of 1.5 years. a) What is the probability that a randomly selected Chihuahua will live to be 14 years or older? b) What is the probability that a randomly selected sample of 25 Chihuahuas will have a mean life span of 14 years or more? What is the probability that a randomly selected sample of 25 Chihuahuas will have a mean c) life span between 12.5 and 14 years?

Q: Suppose that in a certain large city, the mean 100 meter dash time for male high school seniors was…

A:

Q: 3. The heights in inches of male National Basketball Association (NBA) players who played during the…

A:

Q: A company has 1,000 employees. The average number of workdays between absence for illness is 87 with…

A: The objective of this question is to find the probability that the sample mean of workdays with no…

Q: 1. The speeds driven by a population of drivers at a particular location on a highway are normally…

A: Given data,μ=71σ=5.7

Q: Assume the average attendance of a college game is normally distributed with a population mean of…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 9. The most famous geyser in the world, Old Faithful in Yellowstone National Park, has a mean time…

A: Approach to solving the question: Answer the given questions.

Q: A road averages 2,785 vehicles per day with a standard deviation of 585 vehicles per day. A traffic…

A: Let X be the random variable from normal distribution with average or mean (μ) = 2785, standard…

Q: In a study of zebras, it was found that the pregnanciesof zebrasare normally distributed with a mean…

A: Solution: Let X be the pregnancies of zebras. From the given information, X follows normal…

Q: 3. The commute time for Cypress College students who drive from their home to the college follows a…

A: Let X be the random variable from normal distribution with mean (μ) = 26 and standard deviation (σ)…

Q: 24. The average annual professor's salary is $159,964 for an assistant professor and $147,702 for an…

A: Mean() of associate professor=147707standard deviation() of associate professor=8900The average…

Q: Assume the values of accounts receivable by a corporation are distributed with a true mean of…

A:

Q: In a study of work patterns, data from 669 subjects were collected. For the time spent in child…

A: We have given that,  Let X be the random variable from normal distribution with mean (μ) = 23.08,…

Q: A road averages 2,115 vehicles per day with a standard deviation of 485 vehicles per day. A traffic…

A:

Q: The College Board National Office recently reported that in 2011-2012, the547,038 high school…

A: a) The probability that a high school junior who takes the test will score at least 610 on the…

Q: 4. Manufacturer A's television picture tubes have a mean lifespan of 7.27 years and a standard…

A: Given: μ1=7.27σ1=0.67μ2=6.29σ2=0.33n1=40n2=43

Q: What is the probability that the mean income of the sample from country A is above ​$​46,249? (Round…

A:

Q: In 2001 there were 869 road fatalities in Virginia, according to the Virginia Department of Motor…

A:

Q: 4 An LED lightbulb manufacturer produces lights with a mean lifespan of 10,000 hours and a standard…

A: Given information- Population mean µ = 10,000 hours Population standard deviation, σ = 1,000 hours…

Q: Recent report in Times showed a typical family of four spends $490 per month on food with a mean of…

A:

Q: Suppose​ that, according to a recent​ census, the income per capita measured in U.S. dollars was…

A: The central limit theorem states about sampling distribution. As per central limit theorem, the…

Q: Suppose that the height distribution of students in your class was normally distributed with mean 68…

A:

Q: probability

A: The average score of PGA golfers for one round is 65.Standard deviation is Sample size

Q: Draw á random sample of size 5 from a normal population with mean zero and standard deviation unity.

A:

Q: The time taken to complete a maths exam is normally distributed with a mean of 108 minutes and a…

A:

Q: manufacturer claims their batteries have an average life of 5 years with a standard deviation of 1.3…

A: Given that.   X~N( μ , ?)   μ=5    , ?=1.3  , n=25   Z-score =( x - μ )/?

Q: . a) The weight of white lab mice has a normal distribution. What is the mean and variance of white…

A: Hello! As you have posted 3 different questions, we are answering the first question. In case you…

Q: 1) Assume that the heights of men are normally distributed with a mean of 69.8 inches and a standard…

A: From the given information, The heights of men are normally distributed with a mean of 69.8 inches…

Q: 2. Replacement times of TV sets are reported to follow a normal distribution having a mean of 8.5…

A:

Q: Suppose that the body lengths of adult male crested porcupines in a certain region in the U.S. are…

A: The random variable X is defined as the body lengths of adult male crested porcupines in a certain…

Q: An analyst is interested in knowing whether the proportion of childless couples in a community…

A: 1. From the given information, the claim of the problem is the proportion of childless couples in…

Q: Suppose the average amount of money that people spend on their pets per month is 47 dollars, with a…

A: From the Standard Normal table, the bottom of 30% is -0.5244. The average amount of money spent on…

Q: at is the probability of randomly selecting 90 observations from a population ose mean is 100 and…

A: Sample size n=90Population mean=100Population standard deviation=15.7