The numerical index that measures, on average, how far a given value is from the mean is called the range median variance standard deviation

Q: What kind of parameter is applied in the given situation? “The mean height of all Grade 11 students…

A: Given

Q: Compute the mean, median, first quartile, and third quartile. Compute the variance, standard…

A: Given: Sample size, n=15 Time, X 4.21 5.55 3.02 5.13 4.77 2.34 3.54 3.2 4.5…

Q: The most commonly encountered measure of central tendency is the C. mode d. standard deviation a.…

A: Measure of Central tendency: Measure of central tendency is a single value it will lies within the…

Q: the working life time, in years, of a oven is normally distributed with mean 9 and variance 2.25.…

A:

Q: The sample mean, x is called a of the population mean u Interval estimate

A: The sample mean from a group of observations is an estimate of population mean. Given a sample size…

Q: What two characteristics of an empirical distribution can DECREASE the size of the standard error?

A: The two characteristics of an empirical distribution that can decrease the size of the standard…

Q: data is highly skewed,

A: In case the data is highly skewed, can we still rely on the kurtosis coefficient? Why or why not?…

Q: Use Chebyshev's theorem to solve the problem. Find the least possible fraction of numbers in a data…

A: Consider that a random variable X has expected value μ and standard deviation, σ. Now, according to…

Q: The standard normal distribution has a mean of zero and a standard deviation of one. TRUE or FALSE

A: A standard normal distribution has a mean zero and standard deviation is one is called as standard…

Q: What is the best point estimate for the population standard deviation?

A: The point estimate is the sample statistic that is used for estimating the population parameter.

Q: 3. What are the symbols used to represent the population variance and standard deviation?

A: It is an important fact in statistics . It has got wide applications in all statistical procedures .

Q: What does the variance of a random variable measure? What is the standard deviation of a continuous…

A: Variance of a random variable measures how far a set of (random) numbers are spread out from their…

Q: The image database was collected through a questionnaire from a software engineering course.…

A: From the given information, It is required to compute the variance , standard deviation and…

Q: What happens to the variance when outliers are eliminated replaced by values closer to the mean

A: Introduction:Mean:Mean is an important measure of center when the data is quantitative. Mean of a…

Q: Derive variance for gamma distribution?

A:

Q: which of these is NOT a measure of variability?  range  standard deviation  mean  variance

A: Here we have to identify which of the following is not a measure of variability

Q: A competency test has scores with a mean of 69 and a standard debiation of 4. A histogram of the…

A:

Q: Find the 30th and 98th percentile values of a normal variable with Mean of 12 and Variance of 3 (if…

A: Hello! As you have posted 2 different questions, we are answering the first question. In case you…

Q: Which of the following is not affected by extreme value in the data? variance range median mean

A:

Q: Define the sampling distribution of the sample mean for normal population when the variance is…

A: Let the sampling distribution of the sample for normal population when the variance is unknown is…

Q: If the mode of a normal distribution is 100 with variance equals 4, then the mean equals

A: Note: Normal distribution is symmetrical distribution. Hence, the mean, median and mode are all…

Q: The sampling distribution of Pis closely related to the normal distribution. True or False

A: Here we will use Basics of sampling distribution

Q: A relatively new breed of cat that first appeared in China frequently suffers from joint problems.…

A: Given Information: A new breed of cat that first appeared frequently in China suffers from joint…

Q: DEFINE THE SAMPLING DISTRIBUTION OF THE SAMPLE MEAN FOR NORMAL POPULATION WHEN THE VARIANCE IS KNOWN…

A: Standard deviation is the measure of dispersion which used to measure the deviation of data from the…

Q: The is NOT a measure of central tendency, and the is NOT a measure of variation. range median mean…

A:

Q: what is the mean and standard deviation of all z distributions?

A: Z is distributed as a standard normal variable.

Q: the standard normal distribution has a mean of

A: Solution: Let z is the standard normal distribution.

Q: What is the difference between a t-distrbution and a normal distribution in terms of their tails,…

A: Here difference betweenn t distribution and Normal distribution is asked

Q: A set of data is mounded, with a mean of 450 and a variance of 625. Approximately what proportion of…

A: Normal Distribution :  Normal distribution, also known as the Gaussian distribution, is a…

Q: Find the variance of the probabilty distribution for the histogram

A:

Q: Is it possible for the standard deviation of a dataset to be larger than its variance? Explain…

A: The objective is to state whether it is possible for the standard deviation of a dataset to be…

Q: Make a diagram or flow chart on how to determine the appropiate tool when the variance is…

A: We have to make a diagram to show which distribution is used if variance is known and unknown.

Q: Explain how the variance in the numerator and denominator of each F-ratio of a 2-way ANOVA is…

A: Variance in the Numerator and Denominator for 2-Way ANOVA

Q: TRUE OR FALSE. If the population variances are unknown but can be assumed to be equal, a pooled…

A: Given the statement  that if the population variances are unknown  but can be assumed to be equal, a…

Q: What effect does increasing the sample size have on the population standard deviation? I know that…

A: The increase in the size of the sample, decreases the population standard deviation. This happens…

Q: the ____ focuses only on the middle 50 percent of the cases in a distribution.  -interquartile…

A:

Q: According to a study, BMI among men aged 16-61 in the world follows a Normal distribution with mean…

A:

Q: Find the mean deviation of Poisson distribution.

A:

Q: Prove an efficient estimator for the average of a normal population

A: X~ Normal with mean= mu and variance= sigma^2 Find efficient estimator for the mean

Q: In a log normal distribution. What is the expected value of the mean and the Std. And what is the…

A: The mean and standard deviation of log normal distribution is to be found out. The log normal…

Q: t-statistic,

A: Let we have to write the value of t statistics  from the ANOVA table above given all the values…

Q: korynn is calculating the variability in her data by measuring the average distance of scores from…

A: Given: korynn is calculating the variability in her data by measuring the average distance of scores…

Q: what do the mean deviation, variance and standard deviation all have in common? How is this helpful…

A: Variance, standard deviation and mean deviation:Variance is the average of squared difference of…

Q: What is the value of the mean square within?

A: What is the value of the mean square within

Q: Could this curve represent a normal distribution?

A:

Q: The most common measure of central tendency is O a. Mode O b. Mean O c. Standard Deviation O d.…

A: Measures of Central Tendency: Mean , Median, Mode   Measure of Dispersion: Variance, Standard…

Q: a population with a known mean but an unknown variance.

A: We have to study a single sample's mean is being compared to the population with a known mean but…

Q: Why is obtaining the mean and standard deviation of xa first step in approximating the sampling…

A:

Q: The number of 911 calls in Butte, Montana, has a Poisson distribution with a mean of 10.0 calls a…

A: The Poisson distribution:A discrete random variable X is said to have a Poisson distribution with…

Q: Define the term Variance.

A: The mean of the squares of the deviations from the mean is called variance is denoted by σ2.