Expert Help with Data Distribution Questions and Answers

The following data represent the planned rated capacities in megawatts (millions of watts) for the world’s 20 largest hydroelectric plants.
See Attachment
a. Construct a stem and leaf display for the data.
b. How would you describe the shape of this distribution?
$\begin{array}{cc} 18, 200 & 4, 500 & 3, 000 \\ 12, 600 & 4, 200 & 2, 940 \\ 10, 000 & 4, 200 & 2, 715 \\ 8, 370 & 3, 840 & 2, 700 \\ 6, 400 & 3, 444 & 2, 541 \\ 6, 300 & 3, 300 & 2, 512 \\ 6, 000 & 3, 100 \end{array}$

alka8q7 2021-11-27

Find mean and median for given data.
12,15,17,19,15,13,15,20,22,24,25,23,26,29,30

mronjo7n 2021-11-27

Data was collected regarding purchases at a major department store. For each customer making a purchase, the amount of the purchase and the method of payment was recorded. The data is summarized in the table below.
$\begin{array}{cc} U n d e r $ 50 & $ 50 - $ 200 & O v e r $ 200 & T o t a l \\ C a s h & 25 & 30 & 10 & 65 \\ Store Credit Card & 40 & 70 & 50 & 160 \\ Other Credit Card & 45 & 150 & 80 & 275 \\ T o t a l & 110 & 250 & 140 & 500 \end{array}$
Use this data to estimate the following probability.
Find the probability that a customer will spend under $50 on a purchase but will not use cash.
Give the answer as a decimal.
The probability is ?.

jippie771h 2021-11-27

Find Mean, Median, Mode, sample variance and range for following set of data:
$\begin{array}{cc} x & 0.23 & 0.36 & 0.56 & 0.89 & 0.76 & 0.77 & 0.81 \end{array}$

gonjenjemeb 2021-11-27

Compute r, the correlation coefficient, using the following data.
$\begin{array}{cc} x & 6 & 5 & 7 & 3 & 1 & 8 \\ y & 3 & 5 & 3 & 6 & 10 & 3 \end{array}$
$r = ?$

ambiguit 2021-11-27

A data set is formed by recording the sums in 400 rolls of a pair of a dice. A second data set is formed by recording the results of 600 draws of a ball from a box containing 11 balls numbered 2 through 12. Which of the data sets would you expect to have a smaller standard deviation? Explain.

shelbs624c 2021-11-27

If a class of qualitative data set with a class frequency of 70 is represented on a pie chart by an angle of 60 degrees, what is the total frequency of the data set if?
a. 360
b. 2,520
c. 420
d. 309

Fenian41 2021-11-27

In Yellowstone National Park, the geyser Old Faithful alternates between bursts of eruption, which typically last 1.5 to 4 minutes, and periods of dormancy, which last much longer. The table below represents the durations, in minutes, of 60 dormancy periods that occurred during a recennt year.
$\begin{array}{cc} 91 & 99 & 99 & 83 & 99 & 85 & 90 & 96 & 88 & 93 \\ 88 & 88 & 92 & 116 & 59 & 101 & 90 & 71 & 103 & 97 \\ 82 & 91 & 89 & 89 & 94 & 94 & 61 & 96 & 66 & 105 \\ 90 & 93 & 88 & 92 & 86 & 93 & 95 & 83 & 90 & 99 \\ 89 & 94 & 90 & 95 & 93 & 105 & 96 & 92 & 101 & 91 \\ 94 & 92 & 94 & 86 & 88 & 99 & 90 & 99 & 84 & 92 \end{array}$
1. Create a frequency distribution for the data that is grouped into 6 classes. There should be a column for relative frequency.
2. Calculate the mean of the grouped data.

urca3m403 2021-11-27

In a loan database, there are 10 loans to clients with 15 years of business experience. Also, there are 79 loans made to clients with a Graduate education. In the database there are 86 loans to clients with 15 years of experience or who have a Graduate education. How many loans were made to clients with a Graduate education who also had 15 years of experience?
Answer = ? loans

angepepagiortzb 2021-11-27

A company collected data on 100 people with regards to their eye color and whether they were left-handed or right-handed. The data is given in the table below.
$\begin{array}{cc} E y e C o l o r \\ B r o w n & B l u e & G r e e n & T o t a l \\ Left-Handed & 10 & 5 & 5 & 20 \\ Right-Handed & 40 & 5 & 35 & 80 \\ T o t a l & 50 & 10 & 40 & 100 \end{array}$
(a) What is the probability that a person in this group has blue eyes?
(b) What is the probability that a person in this group is right-handed?
(c) What is the probability that a person in this group has blue eyes and is right-handed?

Tomasettiq3 2021-11-27

At Sundae King, 6 of the last 10 sundaes sold had nuts. Considering the data, how many of the next 5 sundaes sold would you expect to have nuts?
? sundaes

Sherry Becker 2021-11-27

I search a DNA database with a sample. Each time I attempt to match this sample to an entry in the database, there is a probability of an accidental chance match of 0.0001. Chance matches are independent. There are 20,000 people in the database. What is the probability I get at least one match, purely by chance?

ahgan3j 2021-11-27

A set of data is found to have a $μ μ = 10 and a σ σ = 2$ .
What is $σ 2 σ 2$ for this data set?
Suppose each data value was divided by 5.
What is $μ μ$ of the resulting data set?
What is $σ σ$ of the resulting data set?
What is $σ 2 σ 2$ of the resulting data set?

lilyta79jd 2021-11-27

Suppose that, on average, the number of car accidents in Hong Kong are 6 per day (which has 24 hours).
i. Determine the probability that at least χ accidents will occur in 12 hour period.
ii. In a two days, if there were 8 car accidents in Hong Kong, what is the probability that 2 accidents have occurred in the first 12 hours of the two days?

adOrmaPem6r 2021-11-27

Describe Bayes’ theorem?

Aufopferaq 2021-11-27

What is the probability of not tossing three tails with three fair coins?

scottyqegi 2021-11-27

Any normal distribution has a variance of one and a mean zero
Select one:
- True
- False

ofodse 2021-11-27

Random variables X and Y have the following joint probabilities: $P (X = 0, Y = 0) = P (X = 0, Y = 8) = P (X = 16, Y = 0) = P (X = 16, Y = 16) = \frac{1}{4}$
a)Make a table of the joint distribution of X and Y and add their marginal distributions to the table.
b)Compute Cov(X, Y). Are X and Y positively correlated, negative correlated,or uncorrelated?
c)Compute the correlation coefficient between X and Y.

luipieduq3 2021-11-27

The average price for a gallon of gasoline in the United States is $3.76 and in Russia it is $3.39. Assume these averages are the population means in the two countries and that the probability distributions are normally distributed with a standard deviation of $.25 in the United States and a standard deviation of $.20 in Russia.
What percentage of the gas stations in Russia charge less than $3.50 per gallon (to 2 decimals)?

kursval7z 2021-11-27

The table to the right list the monthly price (in dollars) of a pound of coffee and a gallon of gasoline over a 6 month period. Find the popolation standard deviation of each set of data.
Find the population standard deviation of coffee prices.
Find the population standard deciation of gasoline prices.
$\begin{array}{cc} M o n t h & C o f f e e P r i c e \frac{$}{l b} & G a s o l i n e P r i c e \frac{$}{g a l} \\ J a n . & 5.29 & 3.99 \\ F e b . & 5.41 & 3.79 \\ M a r . & 4.87 & 3.05 \\ A p r . & 4.21 & 3.03 \\ M a y & 5.43 & 3.65 \\ J u n . & 5.06 & 3.54 \end{array}$

As data distributions tasks can take various shapes and forms, always start with statistical reports as these may help you to find the answers that you require. See data distribution examples next to learn about the most suitable methodology for your particular case. There may be equations and a list of assumptions that are usually presented as word problems. If you have one in your school's textbook, compare it with the questions below and look for similarities. Since we are dealing with probability, do not forget to look into practice C Data distributions answers.

High school statistics