4. Use the following situation to answer the question: Test Scores An article in a local...
(4)Five hundred students from a local high school took a college entrance examination. Historical data from the school record show that the standard deviation of test scores is 40. A random sample of thirty- six students is taken from the entire population of 500 students. The mean test score for the sample is three hundred eighty. Find (a) 95% confidence interval for the unknown population mean test score. (b) 95% confidence interval for the unknown population mean test score if...
1. The Graduate Management Admission Test (GMAT) is a test required for admission into many masters of business administration (MBA) programs. Suppose a random sample of 8 students took the test, and their scores are given below. 699, 560, 414, 570, 521, 663, 727, 413 a. Find a point estimate of the population mean. b. Write a sentence about how you can verify the data could come from a population that is normally distributed, using the graph below. c. Construct...
7. Use the following collection of 30 test scores: 100, 65, 67, 61, 62, 70, 75, 73, 88, 77, 83, 79, 95, 79, 80, 102, 86, 87, 87, 91, 87, 89, 92, 90, 99, 87, 72, 93, 79,52 a. Construct a frequency distribution table using 6 classes: include classes, frequencies, class marks, class boundaries, relative frequencies and relative percentages. b. Find the mean to the nearest tenth and sample standard deviation to the nearest tenth. c. Use the results from...
show work. 7. Use the following collection of 30 test scores: 100, 65, 67, 61, 62, 70, 75, 73, 88, 77, 83, 79, 95, 79, 80, 102, 86, 87, 87, 91, 87, 89, 92, 90, 99, 87, 72, 93, 79, 52 a. Construct a frequency distribution table using 6 classes: include classes, frequencies, class marks, class boundaries, relative frequencies and relative percentages. b. Find the mean to the nearest tenth and sample standard deviation to the nearest tenth. c. Use...
What is the test statistic for this question? Many people now turn to the Internet to get information on health-related topics. A research article used Flesch reading ease scores (a measure of reading difficulty based on factors such as sentence length and number of syllables in the words used) to score pages on Wikipedia and on WebMD. Higher Flesch scores correspond to more difficult reading levels. The paper reported that for a representative sample of health-related pages on Wikipedia, the...
Use the given z-score/percentile table to answer the following question: If scores on a test are normally distributed with mean 48 and standard deviation 10, what percentage are above 62? z-score 1.1 1.2 1.3 1.4 1.5 percentile 86.43 88.49 90.32 91.92 93.32
Assume a normal distribution and use a hypothesis test to test the given claim According to city reports, it was found that the mean age of the prison population in the city was 26 years. He obtains a random samplo of 25 prisoners and finds a mean age of 24.4 years and a standard 20. years. Marc wants to test the claim that the mean age of the prison population in his city is less than 26 deviation of 9.2...
You may need to use the appropriate technology to answer this question. Scores in the first and fourth (final) rounds for a sample of 20 golfers who competed in golf tournaments are shown in the following table. Player First Round Final Round Golfer 1 70 72 Golfer 2 71 72 Golfer 3 70 73 Golfer 4 72 71 Golfer 5 70 69 Golfer 6 67 67 Golfer 7 71 68 Golfer 8 68 73 Golfer 9 67 73 Golfer 10...
Question 6.3.14 In an article titled "Unilateral Nostril Breathing Influences Lateralized Cognitive Performance" that appeared in Brain and Cognition (1989), researchers Block et al. published results from an experiment involving assessments of spatial and verbal cognition when breathing through only the right versus left nostril. The subjects were 30 male and 30 female right handed introductory psychology students who volunteered to participate in exchange for course credit. Initial testing on spatial and verbal tests revealed the following summary statisticS Note...
Kelang e. 2 IUUIS, J9 Ulules, 15 Selurus. Question Completion Status: QUESTION 6 4 points Save Answer For which of the following scenarios would an Analysis of Variance (ANOVA) be appropriate? Determining if the distribution of party affiliation (Democrat, Republican, Independent) has changed since the last election Determining if the proportion of the population that are left handed is more than 10% Determining whether Income Level (Low, Middle, High) and Credit Score (Poor, Fair, Good, Excellent) are independent Determining if...