A certain statistics instructor participates in triathlons. The accompanying table lists times (in minutes and seconds) he recorded while riding a bicycle for five lapsthrough each mile of a 3-mile loop. Use a 0.05 significance level toto have a hill?the claim that it takes the same time to ride each of the miles, Does one of the miles appearO Click the icon to view the data table of the riding times.Determine the null and alternative hypotheses.HọH:Riding Times (minutes and seconds)Mile 1 3:16 3:23 3:23 3:21 3:22Mile 2 3:183:22 3:203:18 3:20Mile 3 3:353:313:293:323.29(Note: when pasting the data into your technology, eachmile row will have separate columns for each minute andsecond entry. You will need to convert each minute/secondentry into seconds only.)PrintDone

Claim : It takes the same time to ride each of the miles.

Answered: A certain statistics instructor…

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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Students at Dover Community College have a mean credit card debt of $4,700 with a median of $2,900. Students at Ralton Community College have a mean credit card debt of $2,100 with a median of $1,900. Which of the following statements are true based on this information? There may be more than one correct answer. i. No more than half of Ralton students have debt more than $1,900. ii. The total debt of Ralton students is more than the total debt of Dover students. iii. The largest debt of the Ralton students is less than the largest debt of the Dover students. iv. About one-fourth of Ralton students have debt more than $2,100. v. Less than half of Dover students have debt more than $4,700.
Which of the following statements are true?
Q.1 Dr. Star is interested in whether the physical coordination skills among low-income pre-school children are different from those of other children. She knows the population mean for the Pre- School Coordination Activity Test (PCAT) is 120 with o x= 10. She tests 80 preschoolers from low-income families and obtains an X= 122. a. Should Dr. Star do a one-tailed or a two-tailed test? Explain your answer. b. State the appropriate H o and H a , given your answer in part a. c. Use at a = 0.05. What is the value of zcrit ? d. Calculate z obt e. Using symbols, report your findings. f. What should Dr. Star conclude?
The mean score for Scrabble players at the neighborhood center is m = 215 points. The players read a book that claims it can raise scores significantly. After reading the book, a team of 25 players obtains a score of M = 218 points, with s= 25. Do the data indicate that reading the book leads to increases in the players’ scores? Test with a = .05 Calculate and evaluate Cohen’s d and r2. What decision can you make and what does it indicate? What type of error could you be making and what would that mean? Report your results with an APA-style phrase.
Compute the RMSE, ME, MAD, MPE, and MAPE using the following dataset. Negative values should be indicated with a minus sign. Round answers to two decimal places. Observations Actual Value Predicted Value 1 227 192 160 206 3 83 210 4 121 259 193 142 263 296 7 202 142 8 126 235 143 196 10 196 24 • RMSE: • ME: • MAD: . MPЕ: % . МАРЕ:
Construct a boxplot for the given data. Include values of the 5-number summary in all boxplots. The test scores of 40 students are listed on the right. 5-number summary: (Q1 = P25 Q2 = P50 Q3 = P75) 1 Minimum = 2 Q1 = 3 Q2 = 4 Q3 = 5 Maximum = 25 35 43 44 47 48 54 55 56 57 59 62 63 65 66 68 69 69 71 72 72 73 74 76 77 77 78 79 80 81 81 82 83 85 89 92 93 94 97 98 Box Plot: (number line counting by five starting at 25 ending at 100)
Coaching companies claim that their courses can raise the SAT scores of high school students. Of course, students who retake the SAT without paying for coaching generally raise their scores. A random sample of students who took the SAT twice found 427 who were coached and 2733 who were uncoached. Starting with their verbal scores on he first and second tries, we have these summary statistics: Gain Try 1 Try 2 nissxS Coached 427 500 92 529 97 2959 Uncoached 2733 506 101 527 101 21 52 Construct, using the conservative estimate for degrees of freedom, a 98% confidence interval for the difference, -, between the mean gain of all students who are coached and the mean gain of all students who are uncoached. to
In each graph, the shaded region represents the P-value of a hypothesis test. Find the P-value, given that the Standardized Test Statistic is T = - 1.9. Round to 4 decimals a. -4 -3 -2 -1 4 T (df.= 19) b. -2 -1 2. T (df. = 19) c. -1 1 4 T (df. = 19) Submit Question MacBook Air
Which of the following answers is correct and why? I really need an explanation for this question.
Need answers for question (d) and (e) without using the Ezcle formula . Show working
HOTSPOT LABEL The times (in seconds) of 8 runners for the 100-yard dash are recorded and used to determine the following calculations. Mean: 11.8 Median: 12.2 CO Mode: 12.5 Range: 3.2 The timekeeper had difficulties with the stopwatch and did not start the time until the runners had been running for 1.5 seconds. What would these calcula- tions be if this 1.5 seconds were added to each runner's 100-yard dash time? . Press each hotspot. Label the corresponding number below with the requested value. ▶ C «» Press to hear a reminder or hint for this problem. IQR: 2.4 100 All Charge
The average house has 15 paintings on its walls. Is the mean larger for houses owned by teachers? The data show the results of a survey of 16 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 18, 15, 17, 14, 16, 17, 18, 15, 15, 14, 14, 14, 15, 15, 16, 18 What can be concluded at the a = 0.05 level of significance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: Select an answer v H1: Select an answer v c. The test statistic ? v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ? va f. Based on this, we should Select an answer v the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population mean is not significantly more than 15 at a = 0.05, so there is sufficient evidence to conclude that the population mean number of paintings that are in…

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