Recent questions in Two-way tables

High school statisticsOpen question

Keira Gibson2022-12-19

The probability that an automobile being filled with gasoline also needs an oil change is 0.30; the probability that it needs a new oil filter is 0.40; and the probability that both the oil and the filter need changing is 0.10. (a) If the oil has to be changed, what is the probability that a new oil filter is needed? (b) If a new oil filter is needed, what is the probability that the oil has to be changed?

High school statisticsOpen question

Rosemary Burns 2022-08-20

Please, tell whether the statement is TRUE or FALSE.

1) The F distribution is symmetric, and its mean is close to 1.

2) A small P-value indicates that the two variables in a two-way table are associated.

3) If the null hypothesis of an ANOVA F-test is true, the F statistic is greater than 1.

4) The more similar the conditional distributions in a two-way table are, the smaller the P-value of the chi-square test becomes.

5) In a two-way table, if the expected counts are about the same as the observed counts, we reject the null hypothesis.

6) The larger the chi-square statistic, the stronger the evidence against the null hypothesis.

7) In a two-way table, if the expected counts are about the same as the observed counts, we reject the null hypothesis.

1) The F distribution is symmetric, and its mean is close to 1.

2) A small P-value indicates that the two variables in a two-way table are associated.

3) If the null hypothesis of an ANOVA F-test is true, the F statistic is greater than 1.

4) The more similar the conditional distributions in a two-way table are, the smaller the P-value of the chi-square test becomes.

5) In a two-way table, if the expected counts are about the same as the observed counts, we reject the null hypothesis.

6) The larger the chi-square statistic, the stronger the evidence against the null hypothesis.

7) In a two-way table, if the expected counts are about the same as the observed counts, we reject the null hypothesis.

High school statisticsOpen question

roletatx 2022-08-19

What is the second name for a two-way frequency table of categorical data?

a. a two-way by two-way table

b. a multiple-treatment table

c. an equal probability table

d. a contingency table

a. a two-way by two-way table

b. a multiple-treatment table

c. an equal probability table

d. a contingency table

High school statisticsOpen question

embelurildmixjm 2022-08-18

Tell whether the statement is TRUE or FALSE.

1. The F distribution is not symmetric but skewed to the right (or skewed positively).

2. If the null hypothesis of an ANOVA F-test is true, the F statistic is close to one.

3. In a two-way table, if the expected counts are about the same as the observed counts, we fail to reject the null hypothesis.

4. If the conditional distributions in a two-way table are similar to each other, the P-value of the test is close to zero.

5. A small P-value indicates that the two variables in a two-way table are not associated.

1. The F distribution is not symmetric but skewed to the right (or skewed positively).

2. If the null hypothesis of an ANOVA F-test is true, the F statistic is close to one.

3. In a two-way table, if the expected counts are about the same as the observed counts, we fail to reject the null hypothesis.

4. If the conditional distributions in a two-way table are similar to each other, the P-value of the test is close to zero.

5. A small P-value indicates that the two variables in a two-way table are not associated.

High school statisticsOpen question

Bellenik3 2022-08-18

Please tell whether the expression is TRUE or FALSE.

“If the conditional distribution in a two-way table are similar to each other, the P-value of the test is close to zero”.

“If the conditional distribution in a two-way table are similar to each other, the P-value of the test is close to zero”.

High school statisticsOpen question

temeljil4l 2022-08-17

Tell whether the expression is TRUE or FALSE.

“In a two-way table, if the expected counts are about the same as the observed counts, we fail to reject the null hypothesis”.

“In a two-way table, if the expected counts are about the same as the observed counts, we fail to reject the null hypothesis”.

High school statisticsAnswered question

**Diabetes and unemployment. **A Gallup poll surveyed Americans about their employment status and whether or not they have diabetes. The survey results indicate that 1.5% of the 47,774 employed (full or part time) and 2.5% of the 5,855 unemployed 18-29 year olds have diabetes. (Gallup, 2012)

a. Create a two-way table presenting the results of this study.

b. State appropriate hypotheses to test for difference in proportions of diabetes between employed and unemployed Americans.

c. The sample difference is about 1%. If we completed the hypothesis test, we would find that the p-value is very small (about 0), meaning the difference is statistically significant. Use this result to explain the difference between statistically significant and practically significant findings.

High school statisticsAnswered question

- 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?

High school statisticsAnswered question

skeexerxo175o 2021-11-21

A table of values for f,g, f', and g' is given.

$$\begin{array}{|ccccc|}\hline x& f(x)& g(x)& {f}^{\prime}(x)& {g}^{\prime}(x)\\ 1& 3& 2& 4& 6\\ 2& 1& 8& 5& 7\\ 3& 7& 2& 7& 9\\ \hline\end{array}$$

a) If h(x)=f(g(x)), find h'(3)

b) If H(x)=g(f(x)),find H'(1).

a) If h(x)=f(g(x)), find h'(3)

b) If H(x)=g(f(x)),find H'(1).

High school statisticsAnswered question

Liesehf 2021-11-20

Find the Covariance of X and Y

$Cov(X,Y)=E\left[XY\right]-E\left[X\right]E\left[Y\right]$

Find the expection of single variables. I'm having troubles evaluation $E\left[XY\right]$. Can it be $X\xb7E\left[Y\right]$?

$\begin{array}{|cccc|}\hline & \text{Smoker}& \text{Non-Smoker}& \text{Total}\\ \text{Heart Attack}& 0.03& 0.03& 0.06\\ \text{No Heart Attack}& 0.44& 0.50& 0.94\\ \text{Totals}& 0.47& 0.53& \phantom{\rule{0ex}{0ex}}\\ \hline\end{array}$

High school statisticsAnswered question

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

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

High school statisticsAnswered question

Wierzycaz 2021-09-26

The following two-way table displays information about favorite sports cars that resulted from a survey given to all students at Shore High School.

What is the probability that a randomly selected student from this school is a boy?

High school statisticsAnswered question

Tabansi 2021-09-23

Use the two-way table of data from another student survey to answer the following question.

What is the marginal relative frequency of students surveyed who like weight lifting?

High school statisticsAnswered question

Caelan 2021-09-20

Use the two-way table of data from another student survey to answer the following question.

Find the conditional relative frequency that a student likes to lift weights, given that the student likes aerobics.

High school statisticsAnswered question

Annette Arroyo 2021-09-18

What is the second name for a two-way frequency table of categorical data?

a. a two-way by two-way table

b. a multiple-treatment table

c. an equal probability table

d. a contingency table

a. a two-way by two-way table

b. a multiple-treatment table

c. an equal probability table

d. a contingency table

High school statisticsAnswered question

floymdiT 2021-09-17

Use the two-way table of data from another student survey to answer the following question.

Like Weight Lifting Yes No Total Like Aerobic Yes 71219 Exercise No 14721 Total 211940

What is the conditional relative frequency that a student likes to lift weights, given that the student does not like aerobics?

Like Weight Lifting Yes No Total Like Aerobic Yes 71219 Exercise No 14721 Total 211940

What is the conditional relative frequency that a student likes to lift weights, given that the student does not like aerobics?

High school statisticsAnswered question

banganX 2021-09-17

Please, answer the question: if there is no association between the categorical variables, which of the following is true?

a) The observed counts in the two-way table should be close to the expected points.

b) The observed counts in the two-way table will be different from the expected points.

c) The chi-square statistic will have a large value and the observed counts in a two-way table will be very different from the expected points.

d) The chi-square statistic will have a large value.

a) The observed counts in the two-way table should be close to the expected points.

b) The observed counts in the two-way table will be different from the expected points.

c) The chi-square statistic will have a large value and the observed counts in a two-way table will be very different from the expected points.

d) The chi-square statistic will have a large value.

Another interesting aspect of statistics and probability that you will encounter in high school and at college is dealing with two-way tables, which is less complex than it really is. You can start with the two-way tables math that you will encounter not only with the equations but with the majority of questions that deal with two-way tables math where you have two categories. If this sounds too complex as you are looking for answers, turn to our examples of two-way tables. The safest bet would be starting with the two-way tables answers that will have both calculation and analysis.