Based on the histogram and “Explore” table of descriptive statistics, are these distributions symmetrical or skewed? If skewed, what kind of skew is present?

Q: Answer the following statistic questions, name two different kinds of shapes that are a possibility…

A: Histogram is a graphical representation which organizes a group of data values into user-specified…

Q: Under what conditions can the mean of the sample be treated as a value that is from a population…

A: From the above data  under what conditions can the mean of the sample be treated as a value that is…

Q: In the right distribution If the mode = 85 and the meadian = 45, then the .... mean equal to

A: Givenmode=85median=45

Q: Out of 100 packages 150. Use your knowledge of normal distribution to estimate the average number of…

A: Given 68 out of 100 is 68% Vide the Empirical rule, also known as 68 - 95 - 99.7 percent rule stated…

Q: Which of the following is closest to the shaded area under the normal distribution curve shown?

A: The area under the curve is less than 2 standard deviations away from the mean. Thus, around 97.5%…

Q: A certain dataset has the following values: Mean = 40; Median = 30; Mode = 30 What is the shape of…

A: It is an important part of statistics . It is widely used .

Q: If the weights of 1,000 adult men in a county are plotted on a histogram, which curve is most likely…

A: For large n we use normal approximation.  And normal distribution shape is like bell.

Q: Here are the summary statistics for the weekly payroll of a small company: iowest salary $300, mean…

A: Given Information: Summary statistics for the weekly payroll of a small company: Lowest salary =…

Q: If the population is    , then the proportion values in the Unit Normal Table are accurate.…

A: Solution: Unit normal table gives the values of probability for a standard normal distribution.  The…

Q: In the right distribution If the mode = 85 and the meadian = 45, then the .. mean equal to .....

A: Given: Mode = 85 Median = 45

Q: Under which circumstance below is the median likely to be a better measure of central tendency than…

A: Measure of central tendency measures the central or average value of a dataset. Measured of…

Q: Do the "Height in Inches" data set adhere to the empirical rule? Would you conclude that| the…

A: (b). Check whether the data of “Height in Inches” follows approximately normal distribution: The…

Q: Bill contends that people spend between 0 and 80 minutes each day listening to music, and he insists…

A:

Q: (d) Is it reasonable to assume that the above data come from a population that follows a normal…

A:

Q: Construct a normal probability plot and boxplot for the set of data given below: 3 6 8 10 13 16 18

A: by using R software to draw the normal probability plot and box plot

Q: Suppose that a variable of a population has a bell-shaped distribution. If you take a large simple…

A: From the given question,

Q: The exponential random variable and the normal have the forgetfulness properly O True O False…

A: We know that, Forgetfulness property or Memoryless property or lacks memory: If X is exponential…

Q: If a distribution is normal with μ = 60 and σ = 15, what is the z score of 40?

A:

Q: Each observed value in a distribution of scores is paired with its expected value from a normal…

A: Answer:   The correct answer is option  (a)

Q: A graphing calculator is recommended. Are the means for the final exams the same for all statistics…

A: Ho: all mean are equal (i.e. null hypothesis) Ha: at least one mean is different (i.e. alternative…

Q: A normal distribution curve has an egg shape when plotted. O True O False

A: Normal Distribution Curve The normal distribution is a symmetrical distribution function on both…

Q: Since the Fair Labor Standards Act was passed in 1938, the standard work week in the United States…

A: For the given statement Select the correct choice

Q: Bill contends that people spend between 0 and 80 minutes each day listening to music, and he insists…

A: As per Bill's conjecture, people spend between 0 to 80 minutes listening to music. He has defined…

Q: The entire family of normal distribution is differentiated by Select one: a. none of the above

A: Normal distribution: The Normal distribution has a bell shaped curve and it is a continuous…

Q: For a normal distribution, the mean is equal to the median. True False

A: The Normal distribution is Symmetric distribution. So,  Mean = Median = Mode.

Q: Is the statement below true or false? The distribution of the sample mean, x, will be normally dist…

A: The distribution of the sample​ mean,  x̄, will be normally distributed if the sample is obtained…

Q: In a left-skewed distribution, is median higher than mode? (A) True B False

A: Type of skewness:   Symmetric:   If the distribution is said to be symmetric then…

Q: For a normal distribution, the mode represents the second quartile. True/False

A: Given that  We want to tell the a normal distribution, the mode represents the second quartile

Q: 1 Would you describe the shape of this distribution as: normal skewed left skewed right

A: Here we have given the histogram.     From using this histogram we have to identify the shape of…

Q: For a positively skewed distribution with a mean = 20, What is the most probable value of the…

A:

Q: For a Friedman test to compare the means of six treatments, what is the approximate distribution of…

A: Distribution of the S-statistic for Friedman test:The test statistic is

Q: makes a distribution a normal distribution?

A: Properties of normal distribution  a) The mean , median and mode of a distribution is same it is…

Q: Under what conditions are boxplots useful for identifying the shape of a distribution? f) Regarding…

A: From the given information we find the solution.

Q: Gardena High School had a mean ACT score of 21 and a mode of 20. What kind of skewness would you…

A: If mean<median<mode then the distribution is left-skewed.

Q: Use the standand normal distribution table to determine the percent of data less than z = 0.59.

A: from the normal distribution table For zscore= 0.59

Q: Which of the following histograms could be modeled by a normal distribution?

A: Given ,  The above graph is the right skewed. Therefore it is not the symmetric distribution. Hence…

Q: A construction company that installs drywall wanted to investigate how a person’s age affects how…

A: Solution: Let x age 18 to 21  and y age 25 to 28  n1=10 Sample size of age 18 to 21n2=10 Sample size…

Q: What is a skewed distribution?

A:

Q: After conducting a literacy test on inmates, the evaluator realizes that the test was much more…

A: Given that after conduting a litrecy test on inmates, the evaluator realises that the test was much…

Q: We learned that there are 4 items by which we characterize a distribution in statistics. Which of…

A: Given : Four terms : a. Central tendency b. Homogeneity c. Skewness d. Kurtosis

Q: According to​ Benford's Law, a variety of different data sets include numbers with leading​ (first)…

A: The aim is to check whether the leading digits in the issued checks are taken from a population…

Q: Explain each of the following concepts and the relevance of each concept in hypothesis testing:…

A:

Q: What is the t statistics and the p value

A: Given ,      ∝ = 0.10 The mean is the sum of all values divided by the number of values : n is…

Q: Which of the following statistical quantities are affected by putliers? (Check all that apply) Mean…

A:

Q: The exponential random variable and the normal have the forgetfulness properly O True O False…

A: Memory less property : The following two distribution have memory less property Geometric…

Q: for a pertectly symmetrical distribution, which relationship is always true O Manmedian mode O…

A: Here we need to choose from the correct option.

Q: Suppose you have a distribution with a mean equal to 100, median equal to 75, and mode equal to 50.…

A: Given that  Mean =100 Median =75 And Mode=50

Q: In a skewed distribution, which two metrics are the farthest apart? It depends on whether there is a…

A: Skewness is determined by mean, median and mode. The data set is said to be left skewed when the…

Q: You can tell if a distribution is normal because it is Approximately bell-shaped and symmetrical…

A: We have given that the statement about to the normal distribution. Here, need to find out the…