For problems 7-10, use the following population information. Lifetimes of a certain brand of efrigerator are normally distributed, with a mean lifespan of 17.2 years and a standard deviation of 3.45 years. 7. What percentage of such refrigerators die before they are 8 years old?

Q: Identify an example of a population that you would expect to be normally distributed. Explain why…

A: It is needed to define a data set that follow normal distribution.

Q: The goals scored by a football team are 4,9,6,8,5.Find the number of goals they score in the very…

A:

Q: What are 2 situations when you will use mode as a measure for central tendency.

A: Mode mode is the value which occurs most frequentlyn in the data set of observation and around which…

Q: How do you tell percentiles in a table

A: Percentile is a score that tells the value below which a given percentage of values falls in a table…

Q: •. Find the mean, median, and mode of 9,10,1,2,9,8,-3,9.

A: We have given that the value of some observations are X: 9,10,1,2,9,8,-3,9 Number of observation= 8…

Q: What does I know, probability plot and box part of the data indicate mean

A: Let's break down each component: Probability plot: A probability plot is a graphical technique used…

Q: Briefly describe the importance of statistics in business

A: The objective of this question is to understand the significance of statistics in the field of…

Q: how to find the mean, median and mode -20, 15, 21, -20, 19

A: Mean:The sum of all data in the data set divided by the number of observations gives the value of…

Q: The sample mean of a dataset is 3.8 from 13 observations, calculate the sum of observations.

A: From the provided information, Mean of dataset (x̅) = 3.8 Number of observations (n) = 13

Q: Describe about the Mean as Balance Point?

A: Mean: The arithmetic mean (also called the mean) is the most commonly used measure of central…

Q: Give an example of a variable with a left skewed distribution that is found within your daily life.…

A: A negatively Skewed distribution is one in which the tail of the distribution shifts towards the…

Q: The median of (1,9,8,4) is?

A: To find the median of 1, 9, 8, 4

Q: 1, 6, 6, 6, 7, 7, 8, 9, 13, 10, 17 The 10th percentile would be

A:

Q: 93, 93, 32, 60, 68, 85, 96  Find the standard deviation

A: We have given that,  The data set,  93, 93, 32, 60, 68, 85, 96 Then, We will find the standard…

Q: Have aset of value right Carve t and Describe have Mean Median. Mode a skewed to the each 15 20

A: Data set : 10,15,20

Q: The mean of data set is 60.The numbers are 50,70,80,60,x.Fins the value of cube of (x+9)

A: The objective of the question is to find the value of the cube of (x+9), where x is a number in a…

Q: Find the value of X2 values that separate the middle 80 % from the rest of the distribution for 20…

A:

Q: Describe about Which Level of Significance to choose.

A: The significance level should be selected with close consideration of key factors such as sample…

Q: In a few sentences, describe what the sampling distribution of the mean represents in your own words

A: The sampling distribution of the sample mean can be defined as the probability distribution of the…

Q: P (mean or median) = P (mean) +P(median) – P (mean and median), to find the probability that a…

A: From the given information, The addition rule is, P(mean or median)=P(mean)+P(median)-P(mean and…

Q: make a stem and leaf plot for 6,7,8,14,14,16,21,26,30,30   - whats the median and mean? - how does…

A: We have given data: 67814141621263030The number of observations:

Q: Here is a distribution of quiz scores for a statistics course: 87, 91, 74, 73, 80, 84, 68, 75 What…

A: according to given data we have to find out the range for the given datadata,87,91,74,73,80,84,68,75

Q: A car salesman collected data on how many cars were sold at a dealership per day for two weeks. The…

A: The data for no. of cars sold in 2 weeks is as follows: 6, 7, 4, 3, 1, 2, 6, 6, 6, 7, 4, 4

Q: What are 2 situations when you will use median as a measure of central tendency.

A: The median is the midpoint of the data array when sorted in either increasing or decreasing order.

Q: The pie chart shows the distribution of the opinions of parents on whether a college education is…

A: CategoryObserved(O)ProportionExpected(E)(O-E)²/EStrongly agree850.54106.384.296901673Somewhat…

Q: ew the table and graph and refer to them when answ w. Make sure that you show all of your work. f 85…

A: x f cumulative frequency 85 2 2 80 3 5 75 15 20 70 20 40 65 50 90 60 45 135 55 30…

Q: P-Value means

A: P- value means: Define: The P value is defined as the probability under the assumption of no effect…