Learn Important Concepts and Skills of High School Statistics

Recent questions in High school statistics

What is the probability that exactly 3 heads will appear if a coin is tossed 4 times

Country Financial, a financial services company, uses surveys of adults age 18 and older to determine if personal financial fitness is changing over time. A recent sample of 1000 adults showed 410 indicating that their financial security was more than fair. Just a year before, a sample of 900 adults showed 315
indicating that their financial security was more than fair.
a. State the hypotheses that can be used to test for a significant difference between the
population proportions for the two years.
b. Conduct the hypothesis test and compute the p-value. At a .05 level of significance,
what is your conclusion?
c. What is the 95% confidence interval estimate of the difference between the two
population proportions? What is your conclusion?

Yandel Hunter 2022-02-12

C) According to the 2 Standard Deviation Rule, data values that are more than 2 standard deviations away from the mean of the distribution are considered to be "unusually high" or "unusually low."

Trystan Horne 2022-02-12

The manager of the store in the preceding exercise calculated the residual for each point in the scatterplot and made a dotplot of the residuals.
The distribution of residuals is roughly Normal with a mean of $0 and standard deviation of $22.92.
A. What percent of the actual sales amount do you expect to be within $5 of their expected sales amount.
B. The middle 95% of residuals should be between which two values? Use this information to give an interval of plausible values for the weekly sales revenue if 5 linear feet are allocated to the stores

The number of hours per week that the television is turned on is determined for each family in a sample. The mean of the data is 3131 hours and the median is 27.227.2 hours. Twenty-four of the families in the sample turned on the television for 1616 hours or less for the week. The 11th percentile of the data is 1616 hours. Step 4 of 5 : What is the value of the 50th percentile?

Terrance Khan 2022-02-11

8. The percent of persons (ages 5 and older) in each state who speak a language at home other than English is approximately exponentially distributed with a mean of 9.848. Suppose we randomly pick a state.

The Office of Prefect of Students conducted a survey to students to determine their preferred mode of learning. Out of 600 students, 365 favored synchronous online learning, 158 favored asynchronous, while the rest favored modular instruction. What is the probability that a randomly selected student favored:

asynchronous mode of learning

modular or asynchronous mode of learning?

synchronous or modular mode of learning?

neither synchronous nor asynchronous mode of learning?

A coin is tossed and a die is rolled, what is the probability of getting head in tossing a coin and getting an odd number when casting a fair die?

      3. A vase contains 8 pink, 9 purple, and 11 yellow tulips. You randomly choose a flower from the vase to take home. Your best friend randomly chooses another flower from the vase to take home. What is the probability that you choose pink tulips and your best friend chooses purple tulips?

      4. Ace is planning to enroll in short courses in TESDA. He plans to take Bread and Pastry Production, and Food and Beverage Service. The probability of finishing Bread and Pastry Production is 48%, and 53% for Food and Beverage Service. If the probability of finishing both courses is 40%, what is the probability of passing at least one course?

      5. According to DOST-FNRI, 24.7% of the population of Filipino elderly, 60 years old and above, are obese. If we select three elderly at random, what is the probability that all selected will be obese?

How to find the median and mode of an ungrounded data

the following are scores of 20 students in an exam. compute the mean score

Francisca Rodden 2022-01-06

A normal distribution has a mean of 80 and a standard deviation of 14. Determine the value above which 80 percent of the values will occur.

Osvaldo Apodaca 2021-12-25

9. The purpose of statistical inference is to provide information about the.
a. sample based upon information contained in the population.
b. population based upon information contained in the sample.
c. population based upon information contained in the population.
d. mean of the sample based upon the mean of the population.
10. Random samples of size 81 are taken from an infinite population whose mean and standard deviation are 200 and 18, respectively. The distribution of the population is unknown. The mean and the standard error of the mean are.
a. 200 and 18.
b. 81 and 18.
c. 9 and 2.
d. 200 and 2.

Ashley Bell 2021-12-24

An important factor in solid missile fuel is the particle size distribution. Significant problems occur if the particle sizes are too large. From production data in the past, it has been determined that the particle size (in micrometers) distribution is characterized by $f (x) = 3 x^{- 4}, f or x > 1, f (x) = 0$ , elsewhere.
a) Verify that this is a valid density function.
b) Evalute F(x).
c) What is the probability that a random particle from the manufactured fuel exceeds 4 micrometers?

Kelly Nelson 2021-12-20

X~N(335, 50).
Find the z-score corresponding to an observation of 284.
-1.02
6.7
1.02
-6.7

Construct 90% and 95% confidence intervals for the population proportion. Interpret the results and compare the widths of the confidence intervals. In a survey of 2149 U.S. adults in a recent year, 1241 made a New Year's resolution to eat healthier.

socorraob 2021-12-12

Suppose $f (x) = 0.125 x$ for $0 < x < 4$ . determine the mean and variance of X.

Teddy Dillard 2021-12-11

Give the following data, which is the equation of the regression line?
$\begin{array}{cc} X & 0 & 3 & 4 & 5 & 12 \\ Y & 8 & 2 & 6 & 9 & 12 \end{array}$
a. $y = 4.88 + 0.625 x$
b. $y = 4.98 + 0.425 x$
c. $y = 4.98 + 0.725$
d. $y = 4.88 + 0.525$

interdicoxd 2021-12-11

On October 30, 2020 the Center for Disease Control (CDC) reported that the daily COVID-19 data showed there were 1.2 new infections per second and that the daily death rate was one death every 107 seconds. Answer the following questions. Show all your calculations and write a sentence about your conclusion:
A.Use the CDC data to calculate the total number of daily infections on October 30th.
B. How many deaths were reported on October 30th?

Juan Hewlett 2021-12-11

The Ocoriee Company somethimes makes printing errors in its advertising in the next issue of the paper "The managing editor has done a study of this problem and found the following data:
$\begin{array}{cc} Number of Errors & 0 & 1 & 2 & 3 & 4 \\ Probability & 0.56 & 0.21 & 0.13 & 0.07 & 0.03 \end{array}$
the probability that the next issue of the paper will have at least 1 error is
Select:
a. 0.21
b. 0.77
c. 0.56
d. 0.44

Monique Slaughter 2021-12-11

From the same data, answer the following
- What is the probability that it is a male or in managerial position?
- What is the probability that it is neither male nor in managerial position
- What is the probability that it is female or clerical portion?
$\begin{array}{cc} P o s i t i o n & M a l e & F e m a l e & T o t a l \\ M a n a g e r i a l & 8 & 4 & 12 \\ E n g i n e e r & 18 & 7 & 25 \\ A c c o u n t a n t & 3 & 5 & 8 \\ C l e r i c a l & 15 & 28 & 43 \\ T o t a l & 44 & 44 & 88 \end{array}$

nemired9 2021-12-11

Let T be the time needed to complete a job at a certain factory. By using the historical data, we know that
$P (T \leq t) = {\begin{cases} \frac{1}{16} t^{2} & f o r 0 \leq t \leq 4 \\ 1 & f o r t \geq 4 \end{cases}$
a. Find the probability that the job is completed in less than one hour, i.e., find $P (T \leq 1)$ .
b. Find the probability that the job needs more than 2 hours.
c. Find the probability that $1 \leq T \leq 3$ .

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.

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