Nationally,  38%  of  fourth-graders  cannot  read  an  age-appropriate  book.   The  following  data  show  the number of children, by age, identified as learning disabled under special education.  Most of these children have reading problems that should be identified  and corrected before third grade.   Current federal law prohibits most children from receiving extra help from special education programs until they fall behind by approximately  two  years’  worth  of  learning,  and  that  typically  means  third  grade  or  later  (USA  Today, September 6, 2001). Age Number of Children 6 37,369 7 87,436 8 160,840 9 239,719 10 286,719 11 306,533 12 310,787 13 302,604 14 289,168 Using the data to develop a probability distribution for x. Specify the values for the random variable and the corresponding values for the probability function f(x). Draw a graph of the probability distribution.

I need to see if I am doing these problems correctly. I am more of a handwritten person so if you can show me how to write these out I would appreciate it for our teacher only shows us how to use a calculator. Nationally, patients who go to the emergency room wait an average of 7 hours to be admitted into the hospital. Do patients at rural hospitals have a lower waiting time? The 15 randomly selected patients who went to the emergency room at rural hospitals waited an average of 5.9 hours to be admitted into the hospital. The standard deviation for these 15 patients was 1.4 hours. What can be concluded at the the αα = 0.05 level of significance level of significance? For this study, we should use     The null and alternative hypotheses would be:       H0:H0:                   H1:H1:               The test statistic     =  (please show your answer to 3 decimal places.) The p-value =  (Please show your answer to 4 decimal places.) The p-value is     αα Based on this, we should…

A research wants to determine if pre-natal exposure to the hormones in birth control pills alters the sex makeup of midshipman fish populations (which are typically half male and half female).Specifically, the researcher wishes to test the hypothesis that exposure to hormones will increase the number of females in the population.The researcher exposes a group of pregnant midshipman fish to birth control hormones and records the sex of the first 19 offspring birthed.They then observe that 13 are female.Use a sign test to test the indicated hypothesis.What is the obtained value?

Bullying,” according to noted expert Dan Olweus, “poisons the educational environment and affects the learning of every child.” Bullying and victimization are evident as early as preschool, with the problem peaking in middle school. Suppose you are interested in the emotional well-being of not only the victims but also bystanders, bullies, and those who bully but who are also victims (bully-victims). You decide to measure anxiety in a group of bullies and a group of victims using an 18-item, 5-point anxiety scale. Assume scores on the anxiety scale are normally distributed and that the variances of the anxiety scores are the same among bullies and victims. The group of 23 bullies scored an average of 40.1 with a sample standard deviation of 10 on the anxiety scale. The group of 28 victims scored an average of 46.8 with a sample standard deviation of 11 on the same scale. You do not have any presupposed assumptions about whether bullies or victims will be more anxious, so you formulate…

The following is based on information from The Wolf in the Southwest: The Making of an Endangered Species, by David E. Brown (University of Arizona Press). Before 1918, the proportion of female wolves in the general population of all southwestern wolves was about 50%. However, after 1918, southwestern cattle ranchers began a widespread effort to destroy wolves. In a recent sample of 37 wolves, there were only 11 females. One theory is that male wolves tend to return sooner than females to their old territories, where their predecessors were exterminated. Do these data indicate that the population proportion of female wolves is now less than 50% in the region? Use α = 0.01. (a) What is the level of significance? State the null and alternate hypotheses. O Ho: P 0.5 O Ho: P = 0.5; H₁: p 5 and nq > 5. O The Student's t, since np > 5 and ng > 5. The standard normal, since np < 5 and nq < 5. O The Student's t, since np < 5 and nq < 5. What is the value of the sample test statistic? (Round…

Ralph Lauren Corporation (RL) designs, markets, and distributes a variety of apparel, home décor, accessory, and fragrance products. The company’s products include such brands as Ralph Lauren, Polo by Ralph Lauren, and Chaps. For two recent years, the company reported the following (in millions):   Year 2 Year 1 Sales $7,230   $7,451   Accounts receivable (end of year) 517   655   The accounts receivable at the beginning of Year 1 was $588 million. a.  Compute the accounts receivable turnover for Year 1 and Year 2. Round to one decimal place.   Year 1 Year 2 Accounts Receivable Turnover fill in the blank 1   fill in the blank 2   b. Compute the number of days’ sales in receivables for Year 1 and Year 2. Use 365 days and round all calculations to one decimal place.   Year 1 Year 2 Number of Days’ Sales in Receivables fill in the blank 3 days   fill in the blank 4 days

es The corporate headquarters of Bank.com, an on-line banking company, is located in downtown Philadelphia. The director of human resources is making a study of the time it takes employees to get to work. The city is planning to offer incentives to each downtown employer if they will encourage their employees to use public transportation. Below is a listing of the time to get to work this morning according to whether the employee used public transportation or drove a car. 23 37 32 40 25 42 25 32. 33 44 Public Transportation 30 Median First quartile Third quartile 31 31 32 33 35 36 Private 34 37 37 Click here for the Excel Data File 38 38 38 39 a. Find the median and the first and third quartiles for the time it took employees using public transportation. (Round your answers to 2 decimal places.)

Which one of the following conclusions could be drawn from a descriptive study? Question options:   a. Concrete experiences help students understand abstract ideas better.   b.Students are more likely to appreciate classical music if they are exposed to it on a regular basis.   c. Students do better in school when they have warm, supportive relationships with their teachers.   d.  Approximately 80% of the students at Southside High School are planning to go to college.

I need help with parts C, D, and E.

Refer to the (x-bar) chart in Section 8.2 Exercise 6 of the text.According to this (x-bar) chart, is the process within statistical control? If not, provide a reason why not. a. It does not appear to be within statistical control because at least one point is more extreme than the UCL or LCL. b. It appears to be within statistical control. c. It does not appear to be within statistical control because there is an obvious non-random trend, cycle, or pattern in the points. d. It does not appear to be within statistical control because at least 8 consecutive points are located all above or all below the centerline.