In the population of students at Milpitas High School, the proportion who are in the marching bandis 0.10. In a random sample of 100 students from this population, the proportion who are in themarching band is 0.04. We would call the value 0.04 aA. statistic.B. parameter.C. z-score.D. P-value.E. significance level.

Parameter : Parameter is the number that describes whole population. e.g : population mean (μ) ,…

Answered: In the population of students at…

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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Does 10K running time change when the runner listens to music? Nine runners were timed as they ran a 10K with and without listening to music. The running times in minutes are shown below. Running Time Ho: H₁: Select an answer ✓ With Music Assume a Normal distribution. For this study, we should use Select an answer Select an answer ✓ 49 32 34 43 53 46 50 46 55 34 43 53 a. The null and alternative hypotheses would be: Without Music What can be concluded at the the a = 0.01 level of significance? = 58 44 41 42 57 57 49 41 42 57 Select an answer ✓ 57 49 45 63 Select an answer ✓ Select an answer Select an answer (please enter a decimal) (Please enter a decimal) b. The test statistic ? | = c. The p-value d. The p-value is ? ✓ a e. Based on this, we should [Select an answer the null hypothesis. f. Thus, the final conclusion is that ... (please show your answer to 3 decimal places.) (Please show your answer to 4 decimal places.) O The results are statistically insignificant at a = 0.01, so…
1. The lower quartile is equal to what? A. 50th percentile B. 25th percentile C. 2nd decile D. 3rd quartile 2. In the set of scores 14, 17, 10, 22, 19, 24, 8, 12, and 19, which of the following is the median score? A. 17 B. 15 C. 16 D. 13 3. percentile? Which of the following is equivalent to the 50th A. 5th decile B. 2nd quartile C. mean score D. all of the above For items 4 to 6, consider the score distribution of 15 students given below: 83 72 87 79 82 77 80 73 86 What is the median score? 81 79 82 79 74 74 4. A. 80 B. 82 C. 73 D. 79 5. Which of the following is the lower quartile? A. 72 B. 74 C. 79 D. 86 6. What is the value of the second decile? A. 72 B. 74 C. 83 D. 85 For items 7 to 10, consider the scores 70 Grade 10 students in Mathematics Test. Less than Cumulative Scores Lower Boundaries Frequency Frequency 95-99 3 94.5 70 90-94 6 89.5 67 85-89 2 84.5 61 80-84 7 79.5 59 75-79 9 74.5 52 70-74 11 69.5 43 65-69 12 64.5 32 6 60-64 59.5 20 55-59 5 54.5 14 3 50-54 49.5 9 4 44.5 6…
Before the furniture store began its ad campaign, it averaged 182 customers per day. The manager is investigating if the average has changed since the ad came out. The data for the 11 randomly selected days since the ad campaign began is shown below: 194, 170, 172, 180, 151, 169, 179, 181, 167, 170, 194 Assuming that the distribution is normal, what can be concluded at the a = 0.01 level of significance? %3D a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Но: ? v Select an answer v H1: ? v Select an answer ♥ c. The test statistic ? v (please show your answer to 3 decimal places.) %3D 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 g. Thus, the final conclusion is that ... the null hypothesis. O The data suggest that the population mean number of customers since the ad campaign began is not significantly different from 182 at a = 0.01, so there is…
Four scenarios of statistical studies are given below. Decide which study uses a population parameter. Answer O Lakeside Family Dentistry reported that 6 of the 15 patients who came in for a regular cleaning one day had at least one cavity. O As part of her senior project, Kaisa asked 84 of her classmates if they voted in the last presidential election. 39 said yes. O of 351 dog owners who were surveyed, 70 reported owning two dogs. The average finish time for the Ironman, Kona was 11:32 for the 1883 finishers, with an average swim time of 1:14, an average bike time time of 4:14.
State whether each situation has independent or paired (dependent) samples. a. A researcher wants to compare the salaries of men and women. She finds a random sample of 80 men and 80 women, and measures their salaries. b. A researcher wants to know whether professors with tenure have fewer office hours than professors without tenure. She observes the number of office hours for professors with and without tenure. a. Choose the correct answer below. O Independent samples O Paired (dependent) samples b. Choose the correct answer below. O Independent samples Paired (dependent) samples
Indicate whether each of the given statements could apply to a dataset consisting of 500 different values. a. The 20th percentile is less than the 30th b. The median is greater than the first quartile. c. The mean is equal to the mode. d. The range is less than zero. e. There are multiple means.
A second-grade teacher wants to compare scores on a reading assessment at the beginning of the year to scores on the same assessment at the end of the year. There are 28 in the class, and all students take both of the assessments. What is the degrees of freedom value for the paired-samples t test? a. 54 b. 55 c. 28 d. 27
1. Consider a sample with data values of 2.20; 1.98; 1.95; 2.27; 2.25; 2,24; 2.31 Compute the mean.
The height (in feet) and trunk circumference (in inches) at breast height (4.5 feet above the ground)was measured for a random sample of Eucalyptus trees. The data are summarized below.Trunk Circumference 21.1 20.8 22.5 19.4 23.6 19.8 21.6 19.9Tree Height 34.2 32.7 35.0 31.9 36.5 31.2 33.8 31.4(a) Determine the linear regression model that will best predict the height of a Eucalyptus treebased on its trunk circumference at breast height.
You are told that the proportion p-hat of those who answered "yes" to a poll about internet use is p-hat = 0.70, and the standard error of the proportion is 0.0458. What was the sample size?
1. Which of the following are examples of statistics? a) Average weight of all adult dogs.b) The 75th percentile of all adult dog weights.c) The largest dog eats lots of blueberry pizza.d) The weight of the largest dog ever.
The college physical education department offered an advanced first aid course last summer. The scores on the comprehensive final exam were normally distributed, and the z-scores for some of the students are shown below. Robert 1.24 Juan 1.66 Haley −1.84 Joel 0.00 Jan −0.84 Linda 1.68 Which of these students scored above the mean? (Select all that apply.) Which of these students scored on the mean? (Select all that apply.) Which of these students scored below the mean? (Select all that apply.) If the mean score was μ = 140 with standard deviation σ = 15, what was the final exam score for each student?

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