The retirement age of National Football League (NFL) players is Normally distributed with a mean of 33 years and a standard deviation of 2 years. What percentage of NFL players retire before age 30?

Q: What is a frequency distribution of qualitative data and why is it useful?

A: Frequency distribution: Sometimes an event will be occurred two or more times, the number of…

Q: Describe the properties of range, mean deviation, and standard deviation.

A: Properties of range:- 1.) The value of range is always non-negative. (either positive or equal to…

Q: Researchers conducting a study of 15 children with a diagnosis of ADHD wish to assess whether the…

A: The BMI of 15 children is given.

Q: Explain this quote by Peter Thiel. “Most people are average. Founders are not. Founders' traits seem…

A: “Most people are average. Founders are not. Founders' traits seem to have an inverse normal…

Q: CNNBC recently reported that the mean annual cost of auto insurance is $962. Assume the standard…

A: Given information: The mean annual cost of auto insurance is $962. The standard deviation is $190.…

Q: What is the standard deviation on the graph ?

A:

Q: The ages of the members of a popular ski club is normally distributed with a mean of 46 years and a…

A: Given that the ages of the members of a popular ski club is normally distributed with a mean of 46…

Q: Define variability and explain why it is an important concept in statistics. What are the three…

A: Variability is a measure of spread or dispersion. In a way it tell us the spread of each data point…

Q: In a Normal distribution 7% items are under 35 and 89% are under 63. Find its mean and standard…

A:

Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

Q: 95% of 80 freshman history students scored between 70% and 80% on a take home quiz. If this data is…

A: Given,  n=80 α= (1-0.95) =0.05 Let X denote the score of freshmen. As per t-distribution table, the…

Q: Suppose a statistics instructor believes that there is no significant difference between the mean…

A: Complete solution and answer is given in the image uploaded below  Thanks!

Q: Use the above data to prepare a frequency distribution table with 8 classes. Find the measures of…

A: The given data are below94911551417343410021807522361941163558698282812572142319838462219872302595…

Q: An advertising agency has stated that 20% of all television viewers watch a particular program. How…

A: From the provided information, An advertising agency has stated that 20% of all television viewers…

Q: A successful basketball player has a height of 6 feet 8 ​inches, or 203 cm. Based on statistics from…

A: Consider X is a random variable defined as the height of a successful basketball player.The provided…

Q: how do you calculate the mean and standard deviation without a calculator ?

A: In this question we have to tell that how to find the Mean and Standard deviation without using the…

Q: In a normal distribution, 11% of the items are under 35 and 76% are under 83. Find the mean and…

A:

Q: Scores for a civil service exam are normally distributed, with a standard deviation of 8. To be…

A:

Q: The time taken to boil a kettle is normally  distributed with a mean of 94 seconds and  a standard…

A: The provided information is  µ=94 σ=6 P(-a<X<a)=0.40…

Q: A researcher showed the mean of weights of college football players to be 200 pounds with a standard…

A:

Q: Hogie lizards have tail lengths that are normally distributed with a mean of 22.5 cm and a standard…

A:

Q: Runner’s World reports that the times of finishers in a 10 km run are normally distributed with a…

A: Let us denote X=The times of finishers X follows a normal distribution with mean=61 and standard…

Q: Explain why each scenario is either sample or population standard deviation. All SCAD students are…

A: Survey based question

Q: The line of best fit through a set of data is y = 25.662 + 2.005x According to this equation, what…

A:

Q: ind the probability that a voice recorder will last between 2.8 and 6 years. Find the 70th…

A: Let X denote the voice recorder and it follows normal distribution with mean of μ=4.1 years and…

Q: standardized math achievement test has a mean of 60 and a standard deviation of 10. If you score at…

A: Given that Mean=M=60, Standard Deviation=Sd=10 P(X=a)=67%=0.67

Q: Consider the variable, type of birth control practiced (e.g., an IUD, condoms, none, etc). Which…

A:

Q: Study on how much time people spend with family in a day shows that the time spending distribution…

A: We have find givan probability..

Q: What is Statistical Measure of the Amount of Variation in a Population?

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: Explain an important difference between the standard deviation and the mean.

A:

Q: The highway mileages of 147 cars are in a file named CARS2.+ These cars are 2003 models. Find the…

A: Mean Formula The mean formula is defined as the sum of the observations divided by the total number…