Since the students for which the reading was taken before and after are same, so this is a repeated measures test.
Thus, the researcher should use repeated measures t equation.
Hence option C.
PLS ANSWER QUICK A researcher obtains a sample of n = 25 students and measures each...
A researcher obtains t = 2.25 for a repeated-measures study using a sample of n = 10 participants. Based on this t value, what is the correct decision for a two-tailed test? Reject the null hypothesis with a -.05 Reject the null hypothesis with a -01 Fail to reject the null hypothesis with a - .05 Cannot determine without additional information
PLS ANSWER FAST A researcher obtains a sample of n = 16 men who have been diagnosed with high blood pressure. The researcher measures each man's blood pressure and then gives each man a 30-minute training session in relaxation therapy. After the training session, each man's blood pressure is measured again. For this sample, the average blood pressure dropped by Mp = 18 (mean of the difference scores) points after therapy, with SMD = 100 (standard error of the difference...
Are these answers correct? If not, what are the correct ones? A researcher is interested in whether using your finger to follow the words you are reading changes reading speed. She has students complete a reading speed test, first without using their fingers to follow the words and then again while using their fingers to follow the words. The researcher randomly selects a sample of 56 students who, at the beginning of the study, scored an average of 256 words...
1 A researcher wants to find out which type of classroom instruction significantly improves students’ test performance. He designed four types of instruction for four samples of students. Later all four samples were given the same test and their average performance was compared. What statistical test should be used by the researcher to analyze the results of this study? A. Pearson correlation B. t-test for independent groups C. one-factor Anova for between groups D. Chi2 for Independence 2 A researcher...
Question 2 The primary advantage of the related samples design is that it controls for ________ that may artificially increase the observed differences between means in other types of studies. Group of answer choices degrees of freedom MD individual differences the effect of the treatment Question 3 A manager would like to know if the performance of sales representatives significantly (α = .05) improves over the first 6 months of employment. For 5 new sales representatives, the number of sales...
Nutrition might also affect cognitive performance. A group of researchers hypothesize that students who eat fast food often have worse grades than those who eat healthier food. Consider the data for the two groups. The mean grades of students who regularly eat fast food is 78.5 (M1 = 78.5) and the mean grade for students who cook healthier food is 81 (M2 = 81). There were 22 participants in the study as a whole, and there are 11 participants in...
25 por QUESTION 4 Assuming that other factors are held constant, which of the following sets of data is most likely to produce a statistically significant value for the repeated measures t statistici n 15 and MD-2 On-15 and MD - 4 On - 30 and MD - 2 On - 30 and MD - 4 25 QUESTION 5 For which of the following situations would a repeated-measures research design be appropriate? comparing mathematical skills for girls versus boys at...
Consider a multiple regression model of the dependent variable y on independent variables x1, X2, X3, and x4: Using data with n 60 observations for each of the variables, a student obtains the following estimated regression equation for the model given: y0.35 0.58x1 + 0.45x2-0.25x3 - 0.10x4 He would like to conduct significance tests for a multiple regression relationship. He uses the F test to determine whether a significant relationship exists between the dependent variable and He uses the t...
TEST 1: ANSWERS INTS EACH). This section takes around 5 minutes. Name Spring 2019 8) A researcher wants to determine whether female teachers give higher or lower grades, on average, then male teachers. She picks a random sample by picking a random sample of schools, in the schools picked, picking a random sample of departments, and in the departments picked, picking a random sample of teachers. What kind of sampling was performed? d) voluntary response e) cluster b) stratified Random...
pls help java ASAP!!!!!!! Topic String Tokenizer Static Methods Static Variables Primitive Arrays Description Enhance the last assignment by providing the following additional features: (The additional features are listed in bold below) Class Statistics In the class Statistics, create the following static methods (in addition to the instance methods already provided). • A public static method for computing sorted data. • A public static method for computing min value. • A public static method for computing max value. • A...