Problem 4aA study of young baseball pitchers found that7 of the 103 who had thrown the curveballs beforethe age of 13 were injured seriously enough to havesurgery or quit pitching. Of the 187 who had notthrown curveballs before the age 13, 8 were injuredseriously enough to have surgery or quit pitching. Thehypothesizedcurveballs before age 13 put young pitchers at risk forresearchershadthatthrowinginjury.Display the data in a two-way frequency table.T

Two by Two Contingency Table: The two by two contingency table (also called fourfold contingency…

Answered: Problem 4a A study of young baseball…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question 1 W Show all your work. Indicate clearly the methods you use, because you will be scored on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. A marketing director for a beverage company conducted a study to investigate people's soda preferences in two regions of the country. The director selected a random sample of 100 people from the east coast and a random sample of 100 people from the west coast to survey. The responses are summarized in the following table. East Coast West Coast Regular soda 44 37 Diet soda 39 42 No preference 17 21 Total 100 100 Do the data provide convincing statistical evidence, at the level of a = 0.05, that the preferences are different between the two regions of the country? Complete the appropriate inference procedure to support your answer.
Question 11 A sample of adults was asked to indicate the amount of money, in dollars, they would be willing to spend on a wedding gift. When a histogram was constructed based on the responses given by each adult, most of the dollar amounts were on the larger side, with only a few dollar amounts on the smaller side. Two measures of center were calculated for this sample: $150 and $279. One of these measures is the mean, and the other is the median. Which measure must be the mean? The mean is $279 because the distribution of dollar amounts would be skewed to the left. The mean is $279 because the distribution of dollar amounts would be skewed to the right. The mean is $150 because the distribution of dollar amounts would be skewed to the left. The mean is $150 because the distribution of dollar amounts would be skewed to the right.
Question 35 ▾ The New York City Marathon is a highly selective race. One way to gain entry into the race is to qualify based on a time from a prior-completed marathon. The NYC Marathon's organizers use this method to limit admission to the top 8% of marathon runners. If the mean completion time of all marathons is 190 minutes with a standard deviation of 20 minutes, what qualifying time should the NYC Marathon organizers set so that only the top 8% of runners will be admitted entry to the NYC Marathon? Round the solution to one decimal place, if necessary. The qualifying time should be set to admitted entry to the NYC Marathon. minutes to ensure that only the top 8% of runners will be
QUESTION ONEA. Develop a histogram for the frequency distribution below, the commutingdistance for 50 employees of a particular company. Commuting Miles Frequency 0-under 4 3 4-under 8 10 8-under 12 6 12-under 16 16 16-under 20 6 20-under 25 9 Total 50 B. A statistics professor administered an exam to three different classes. The 8:00 class had 20 students and an average score of 82.4. The 9:00 class had 24 students and an average of 78.9. The 29 students in the 10:00 class had an average of 87.3. Calculate the overall average for all three classes combined.C. The following table summarizes the grade point averages (GPAs) of graduatestudents in a statistics class. Approximate the mean GPA of the class. GPA Frequency 3.0-under 3.2 5 3.2-under 3.4 9 3.4-under 3.6 6 3.6-under 3.8 16 3.8-4.0 2 D. The following table lists the number of days that 15 houses in a particular areawere on the market…
Question 2 At the end of 2020, the mean age of the U.S. population was estimated to be 38.5 years old. You are tasked with determining whether the mean age of the population of IAT participants (for your chosen IAT data set) differs from the mean age of the U.S. population. 1. Let be the mean age of the population of IAT participants for your chosen IAT data set. State the hypotheses (symbolically and in words). Include a clear description of the populations and the variable. 2. 3. 4. Use StatCrunch to create a histogram for the age distribution in your unique IAT sample. Download the StatCrunch output window and embed your histogram with your response. Can we safely use the t-test with your IAT sample? Explain. Perform the t-test using StatCrunch. Copy the information from the StatCrunch output window and paste it into your response. Based on the P-value, state your conclusions in context. Use a 5% level of significance. (NOTE: Since StatCrunch correctly calculates the P-value for…
QUESTION 6 The Corner Drug Store fills prescriptions for a popular children's antibiotic, amoxicillin. The daily demand for amoxicillin is normally distributed, with a mean of 200 kilograms and a standard deviation of 80 kilograms. The vendor for the pharmaceutical firm that supplies the drug calls the drugstore pharmacist every 30 days to check the inventory of amoxicillin. During a call, the druggist indicated that the store had 60 kilograms of the antibiotic in stock. The lead time to receive an order is 4 days. a) Determine the order size that will enable the drugstore to maintain a 95% service level.
Question 2
Question 2 Is the proportion of wildfires caused by humans in the south different from the proportion of wildfires caused by humans in the west? 380 of the 550 randomly selected wildfires looked at in the south were caused by humans while 404 of the 572 randomly selected wildfires looked at the west were caused by humans. What can be concluded at the a = 0.01 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: Select an answer Select an answer Select an answer v (please enter a decimal) H: Select an answer v Select an answer V Select an answer |(Please enter a decimal) c. The test statistic (please show your answer to 3 decimal places.) d. The p-value = e. The p-value is ? a f. Based on this, we should Select an answer g. Thus, the final conclusion is that ... (Please show your answer to 4 decimal places.) the null hypothesis. O The results are statistically insignificant at a = 0.01, so there is insufficient…
QUESTION 17 Obtain the five-number summary for the given data. The test scores of 15 students are listed below. 40 46 49 54 56 62 67 70 73 77 85 87 90 94 95 40, 52.75, 70, 85.5, 95 40, 54, 70, 87, 95 40, 54, 71.5, 87, 95 40, 52.75, 71.5, 85.5, 95
2-8. You are given the following data: 10 6 4 9 5 5 5 7 2 5 5 5 4 5 7 7 8 8 4 7 5 5 5 7 8 7 7 5 4 4 7 4 7 7 6. 8 6. 5 7 6 4 4 d. Develop a relative frequency histogram. e. Compare the two histograms. Why do they look alike? 499 448 n4 6 673
Create a frequency distribution from Question 1 on previous sheet using the following classes: 2-15, 16-29, 30-43, 44-57,58-71, 72-85, 86-99. Provide the frequency, relative frequency, cumulative frequency using these classes:

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