QUESTION S Suppose students' ages follow a normal distribution with a mean of 22 years old and a standard deviation of 3 years. If we select a random sample of size n=9 students, what is the probability that the sample mean age is between 19 and 21 years? Round your answer to four decimal places.

Q: Is the difference between the mean annual salaries of statisticians in Region 1 and Region 2 more…

A: Solution: Given information: n1=48  Sample size of region 1n2= 44 Sample size of region 2x1=$67700…

Q: I don't understand this can someone help me please? At the beginning of Week 3, construct a…

A: There are six outcomes in a standard die namely 1, 2, 3, 4, 5 and 6. Also, these outcomes occur only…

Q: f we draw a sample of 144 people from a population with the mean age of 45 and the standard…

A: Given that  Sample size (n) = 144 Population mean (μ) = 45 Standard deviation (σ) = 24   We know…

Q: ENNBC recently reported that the mean annual cost of auto insurance is 1002 dollars. Assume the sta…

A: Note: Please repost remaining subparts as i can author only 3 subparts as per my policy Given…

Q: How likely is this mean to be less than 500

A: Let M denote the sample mean SAT exam score. Given that Mean = 523, SD = 89 and sample size n = 100

Q: The population has a mean of 14 and a standard deviation of 3. The sample size of your sampling…

A:

Q: The weight of football players is normally distributed with a mean of 200 pounds and a standard…

A: According to the provided information, Mean (μ) = 200 Standard Deviation (σ) = 25

Q: The scores on the exam public health professionals take to be certified follows a normal…

A:

Q: A variable is normally distributed with a mean of 100 and a standard deviation of 10. A student…

A: From the given information,   Mean = 100 Standard deviation = 10

Q: Recently, a random sample of 13–18 year olds was asked, "How much do you currently have in savings?"…

A: The provided frequency distribution is: Savings ($) Frequency 0-199 343 200-399 94…

Q: High school students across the nation compete in a financial capability challenge each year by…

A: Students who score in the top 8 percent are recognized publicly for their achievement by the…

Q: Suppose that the scores on a reading ability test are normally distributed with a mean of 60 and a…

A: Mean = 60 Standard deviation =9

Q: received a score below 63 Half the scores to fall between 70 and 83 NO Half the scores to fal

A: We have,  μ=75σ=6 We will see all the five cases. 1). In the first case, we will find the…

Q: The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 80…

A:

Q: TEST- Part 2 - Normal Curve 2. The weekly salaries of teachers in one state are normally distributed…

A: We have:-    according to given question random  variable follows normal distribution as follows…

Q: IQ scores are normally distributed with a mean of 100 and a variance of 225. What percentage of…

A: Let X be the random variable from normal distribution with mean (μ) = 100 and variance (σ2) = 225…