Learn Important Concepts and Skills of High School Statistics

Recent questions in High school statistics

Serotoninl7 2021-11-25

You fit a CAPM that regresses the excess return of Coca-cola on the excess market return using 20 years of monthly data. You estimate $α = 0, 72, β = 1, 37, S^{2} = 20, 38, σ_{X}^{2} = 19, 82 and μ_{x} = 0, 71$ .
What is the 99% confidence interval for $β$ ?

Lucille Smitherman 2021-11-25

Among 157 African-American men, the mean systolic blood pressure was 146 mm Hg with a standard deviation of 27. We wish to know if on the basis of these data, we may conclude that the mean systolic blood pressure for a population of African-American is greater than 140. Use $α = 0.01$ .
Solution 1. Data: Variable is systolic blood pressure, $n = 157$ , sample mean $= 146, s = 27, α = 0.01$ .

ushwaui 2021-11-25

In calculating the mode for the grouped data, $f_{0}$ represents

kenziebabyyy4e 2021-11-25

A shot is fired at a very large circular target. The horizontal and vertical coordinates of the point of impact are independent random variables each having a standard normal density. Here the center of the target is taken as the origin. What is the density function of the distance from the center of the target to the point of impact? What are the expected value and the mode of this distance?

miyoko23q3 2021-11-25

The joint distribution of X and Y is as follows.
$\begin{array}{cc} V a l u e s o f Y \\ 1 & 0 & P {X = x} \\ V a l u e s o f X & 1 & 0.1 & 0.2 & 0.3 \\ 0 & 0.3 & 0.4 & 0.7 \\ P {Y = y} & 0.4 & 0.6 & 1.0 \end{array}$
a. Find the marginal distribution of X and Y.
b. Find the conditional distribution of Y given $X - 1, P {Y = y ∣ X = 1}$
c. Compute the conditional expectation of Y given $X = 1, E {Y = y ∣ X = 1}$

Ann Tice 2021-11-25

Illustrate the inverse transformation method for obtaining a random observation from a given probability distribution?

skeexerxo175o 2021-11-21

A table of values for f,g, f', and g' is given.
$\begin{array}{cc} x & f (x) & g (x) & f^{'} (x) & g^{'} (x) \\ 1 & 3 & 2 & 4 & 6 \\ 2 & 1 & 8 & 5 & 7 \\ 3 & 7 & 2 & 7 & 9 \end{array}$
a) If h(x)=f(g(x)), find h'(3)
b) If H(x)=g(f(x)),find H'(1).

yapafw 2021-11-21

a. Identify the conditions would it be reasonable to use z-scores to compare the standings of the student on the two tests relative to the other students in the graduating class.
Given info:
The mean SAT math score is 528 with a standard deviation of 105. The mean SAT verbal score is 475 with standard deviation is 98. A student in the graduating class scored 740 on SAT math and 715 on SAT verbal.
b. To identify the test did the student do better.

Charles Cisneros 2021-11-20

a. Find Carolinas

Liesehf 2021-11-20

Find the Covariance of X and Y
$C o v (X, Y) = E [X Y] - E [X] E [Y]$
Find the expection of single variables. I'm having troubles evaluation $E [X Y]$ . Can it be $X \cdot E [Y]$ ?
$\begin{matrix} Smoker & Non-Smoker & Total \\ Heart Attack & 0.03 & 0.03 & 0.06 \\ No Heart Attack & 0.44 & 0.50 & 0.94 \\ Totals & 0.47 & 0.53 \end{matrix}$

varaderiyw 2021-11-18

Make a scatterplot that shows a strong relationship between two variables but a low correlation.

Amari Flowers 2021-10-28

Mark All That Are True. We can use the Normal (Z) table to find probabilities about:
You must choose all five correct statements to get credit.
A) individuals, if the population is Normal
B) individuals, if the population is NOT Normal
C) averages based on small n, if the population is Normal
D) averages based on small n, if the population is NOT Normal
E) averages based on large n, if the population is Normal
F) averages based on large n, if the population is NOT Normal
G) count of successes out of n independent trials
H) sample proportion of successes out of n independent trials, when np and $n (1 - p)$ is large enough

e1s2kat26 2021-10-28

To explain: The benefits of representing the data sets using frequency distributions.
To explain: The benefits of representing the data sets using graphs of frequency.

permaneceerc 2021-10-27

1. Which of the following statements is not true?
The most appropriate measure of central tendency for highly-skewed data distributions is the median
The variance is always greater than the standard deviation.
A 10% trimmed mean of a given data is solved by removing the largest 10% and smallest 10% of the data, then computing for the mean.
The coefficient of variation is the ratio between the mean and the standard deviation.

Jaden Easton 2021-10-26

A normal distribution has a mean of 50 and a standard deviation of 4. Please i want to determine the value below which 95% of the observations will occur.

illusiia 2021-10-23

(True/False) The central limit theorem implies that:
1.a All variables have bell-shaped sample data distributions if a random sample contains at least 30 observations.
2.b. Population distributions are normal whenever the population size is large.
3.c. For large random samples, the sampling distribution of $\overset{―}{y}$ is approximately normal, regardless of the shape of the population distribution.
3.d. The sampling distribution looks more like the population distribution as the sample size increases.

geduiwelh 2021-10-23

Answer true or false to each of the statements in parts (a) and (b), and explain your reasoning.
a. Two data sets that have identical frequency distributions have identical relative-frequency distributions.
b. Two data sets that have identical relative-frequency distributions have identical frequency distributions.
c. Use your answers to parts (a) and (b) to explain why relativefrequency distributions are better than frequency distributions for comparing two data sets.

Tobias Ali 2021-10-21

Describe the shape of a scatter plot that suggests modeling the data with a logarithmic function.

hexacordoK 2021-10-20

Regarding a scatterplot,
a) identify one of its uses.
b) what property should it have to obtain a regression line for the data?

aortiH 2021-10-20

Explain the procedure for constructing frequency distribution for categorical data using Excel.
Explain the procedure for constructing frequency distributions for numerical data using Excel.

As a rule, high school statistics help is quite hard to find because once a student starts looking for statistics help, it comes up with more advanced help in this regard. Taking this problem into consideration, we have collected some helpful high school statistics questions and answers that will meet the high-school level standards. Looking into these will help you to find the most suitable solution or post your own questions based on equations, data reports, and so on. Take your time to explore available high school statistics questions as these will be mostly similar to what you may have.

High school statistics

Statistics Projects for High School Students