 High school statistics questions and answers

Recent questions in High school statistics Wotzdorfg 2020-10-27 Answered

Which two of the four scatter plots have most positive correlation and closer to zero correlation  Maiclubk 2020-10-27 Answered

Answer true or false to the following statements and explain your answers. a. In multiple linear regression, we can determine whether we are extrapolating in predicting the value of the response variable for a given set of predictor variable values by determining whether each predictor variable value falls in the range of observed values of that predictor. b. Irregularly shaped regions of the values of predictor variables are easy to detect with two-dimensional scatterplots of pairs of predictor variables, and thus it is easy to determine whether we are extrapolating when predicting the response variable. Kyran Hudson 2020-10-27 Answered

To find:The conditions for the population and the study design that are required by the procedure and are used to contruct the confidence interval. To identify:The important conditions for the validity of the procedure in the given case. In an experiment on the effect of calcium and blood pressure, 54 healthy white males are divided into two groups’ calcium and placebo. The summary statistic for the systolic blood pressure of the 27 members of the placebo group is ¥ = 114.9 and s=9.3. ruigE 2020-10-27 Answered

Identify the type of random sampling used in the study design. The researcher is interested compare the student's loan debt for the students who attend four-year public universities and four-year private universities. A random sample of 100 graduates of the public universities and 100 graduates of private universities are taken. preprekomW 2020-10-26 Answered

Suppose that strep throat affects 2% of the population and a test to detect it produces an accurate result 99% of the time. a. Create a two-way table for 10,000 people who were tested. b. What is the probability that someone who tests positive actually has strep throat? Trent Carpenter 2020-10-26 Answered

You can use a scatterplot to estimate a value between two known values. Estimate the world production of oil when the United States produced 12% of the world's oil. Draw a scatterplot. Find 12% on the vertical axis. More horizontally to the line of points. Estiamte where the new point would fit in the pattern. Then move down to the horizontal axis. Oil Production 1960-2000 (billion barrels) World Oil production: 45.9, 52.8, 59.9, 68.3, 72.5 U.S. Percent of world Oil Production: 21, 16, 13, 9, 7 Tobias Ali 2020-10-26 Answered

Sketch a scatterplot where the association is nonlinear, but the correlation is close to $$[r = -1]$$. tricotasu 2020-10-26 Answered

In this exercise , a two-way table is shown for two groups , 1 and 2 , and two possible outcomes , A nad B $$\begin{array}{|c|c|c|}\hline &\text{Outcome A}&\text{Outcome B}&\text{Total}\\\hline \text{Group 1} &30&20&50\\ \hline \text{Group 2}&40&110&150\\ \hline \text{Total}&70&130&200\\ \hline \end{array}\\$$ a) What proportion of all cases had Outcome A? b) What proportion of all cases are in Group 1? c) What proportion of cases in group 1 had Outcome B? d) What proportion of cases who had Outcome A were in group 2? Cabiolab 2020-10-25 Answered

Which of the following is(are) True? I. The means of the Student’s t and standard normal distributions are equal. II. The standard normal distribution approaches the Student’s t distribution as the degrees of freedom becomes large. A. I only B. II only C. Both I and II D. Neither I nor II CoormaBak9 2020-10-25 Answered

$$\begin{array}{|c|c|c|c|}\hline& \text{SUV} & \text{Sedan} & \text{Totals} \\ \hline\text{Male} & 21&39&60\\\hline\text{Female}&&45&180\\\hline\text{Total}&156&84&\\\hline\end{array}$$ The two-way table represents the results of a random survey taken to determine the preferred vehicle for male and female drivers. Given that the participant is a female, which choice is the conditional relative frequency that she prefers an SUV a)0.25 b)0.55 c)0.75 d)0.87 sodni3 2020-10-25 Answered

A survey is done of customers at a coffee shop to determine whether there is any difference in the type of dri ordered based on the gender of the customers. $$\begin{array}{|c|c|} \hline & \text{Coffea} & \text{Tea} &\text{Cold drink}&\text{Total}\\ \hline \text{Men} & 80 & 76 & 34 & 190 \\ \hline \text{Women} & 55 & 39 & 66 & 160\\ \hline \text{Total} & 135 & 115 & 100 & 350\\ \hline \end{array}$$ What is the probability that a customer in the survey is female given that she ordered cold drink? bobbie71G 2020-10-23 Answered

Matching Here are several scatterplots. The calculated correlations are -0.923, -0.487, 0.006, and 0.777. Which is which?  Brittney Lord 2020-10-21 Answered

Would you expect distributions of these variables to be uniform, unimodal, or bimodal? Symmetric or skewed? Explain why. a) Ages of people at a Little League game. b) Number of siblings of people in your class. c) Pulse rates of college-age males. d) Number of times each face of a die shows in 100 tosses. Braxton Pugh 2020-10-21 Answered

Distribution Suppose we have a binomial experiment in which success is defined to be a particular quality or attribute that interests us. (a) Suppose $$n = 100$$ and $$p= 0.23$$. Can we safely approximate the $$\hat{p}$$ distribution by a normal distribution? Why? Compute $$\mu_{\hat{p}}$$ and $$\sigma_{\hat{p}}$$. naivlingr 2020-10-20 Answered

Bayes' Theorem is given by $$P(A|B) = \frac{P(B|A) \cdot P(A)} {P(B)}$$. Use a two-way table to write an example of Bayes' Theorem. e1s2kat26 2020-10-20 Answered

The two-way table shows the eye color of 200 cats participating in a cat show. $$\begin{array}{c|ccc|c} &\text { Green } & \text { Blue }& \text { Yellow }& \text { Total }\\ \hline \text{ Male } & 40&24&16&80\\ \text{ Female} &30&60&30&120\\ \hline \text{Total}&70&84&46&200 \end{array}$$ Make a two-way relative frequency table to show the distribution of the data with respect to gender. Round to the nearest tenth of a percent, as needed. Tammy Todd 2020-10-20 Answered

The explanatory variable in the given study. To determine:Whether the given explanatory variable is qualtitative or quantitative. tricotasu 2020-10-18 Answered

...