# High school statistics questions and answers

Recent questions in High school statistics

### 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 Answered

### 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 Answered

### 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 Answered

2022-02-04

2022-01-29

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

Osvaldo Apodaca 2021-12-25 Answered

### 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 Answered

### 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 , 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 Answered

2021-12-16

### Suppose $f\left(x\right)=0.125x$ for $0. determine the mean and variance of X.

Teddy Dillard 2021-12-11 Answered

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

Juan Hewlett 2021-12-11 Answered

### 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: $\begin{array}{|cccccc|}\hline \text{Number of Errors}& 0& 1& 2& 3& 4\\ \text{Probability}& 0.56& 0.21& 0.13& 0.07& 0.03\\ \hline\end{array}$ 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 Answered