1. Ashton wonders if dog owners in her hometown of Chicago walk their dogs outdoors adifferent amount in the winter, when it is cold and more uncomfortable to be outside, than in thesummer. Ashton records the number of times per week a sample of 10 dog owners walk theirdogs in August and in February. The observed frequencies of dog walks are displayed in thetable below.August5254637556February5334424434Test at the .05 level, two-tailed. Computer the 95% confidence interval.

To test if dog owners in Chicago walk their dogs a different amount in August and February, we can…

Answered: 1. Ashton wonders if dog owners in her…

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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24. A sports medicine major wanted to conduct an experiment to determine if there is a correlation between the members of the soccer team's leg strength and the time it takes for them to sprint 40 yards. He sets up the following test and records the data: Every day for a week, he counts how mnany times each player can leg press 350 pounds. The following week, he has each player sprint 40 yards every day. The table shows the average number of leg-press repetitions and the average 40-yard dash time (in seconds) for seven randomly selected players. What is the equation of the line of best fir? How many seconds should he expect a player to take to run -0 yards if that player can do 22 leg-press repetitions Round any values to the nearest tenth, if necessary Leg Press (reps) 32 7 11 23 28 15 12 40-vard Dash (s) S.6 14.6 7.1 S.3 11 9 13 4 9.5 53°F a
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.
Researchers asked parents of 19 American children, ages 8 to 12, to complete surveys on the number of hours their children spent reading and the number of hours they spent on screen-based media time. Each of the children also underwent magnetic resonance imaging (MRI) to assess connectivity in the brain. More time spent reading was associated with higher connectivity, while more screen time was associated with lower connectivity in the brains of the children. 1. What is the sample in this study? c 2. What is a possible population? F6 3. Is this an experiment or an observational study? Why did you make that decision? 4. Can we conclude that more time spent reading increases connectivity in children's brains? 5. Identify a possible confounding variable and explain how it meets the definition of a confounding variable. MacBook Air tv♫ F7 * 2 DII F8 ( ZA F9 1 F10 & F11 DOCX A
4. A sporting goods store kept a record of sales of five items for one randomly selected hour during a recent sale. Construct a frequency distribution for the data (B = baseballs, G Golf balls, T = Tennis balls, S= Soccer balls, F= footballs). %3D B F F T T. SI SI SI
The following table shows the results of 20 random Full Sail college students when asked the number of hours spent daily on their laptops. Complete a grouped frequency distribution for the data, with a class width of 4. Which frequency distribution, if any, is correct?
2. A medical practitioner is studying the average weight (in pounds) of an athlete in the Olympic. The following data are obtained: What measure of central tendency is best to use in the study? Data: 168, 219, 140, 188, 250, 145, 178, 192, 208, 134 3. The frequency table below provides the yield in gram of 200 evenly-spaced soy bean plants and corresponding frequencies: compute for the appropriate measure of central tendency Yield 8 13 18 23 28 33 38 43 48 53 58 63 68 Frequency 5 14 30 37 35 23 20 17 4 4 1. 2. 00 3. 3.
Does it seem to you that people tend to be absent more on some days of the week than on others? Recently, a major biotechnology firm collected data with the hope of determining whether or not its employees were more likely to be absent on some weekdays than on others. The firm examined a random sample of 130 employee absences. The distribution of these 130 absences is shown in the table below. The observed frequency for each category (each weekday) is shown in the first row of numbers. The second row of numbers contains the frequencies expected for a sample of 130 employees if employee absences at the firm are equally likely on each of the five weekdays. The bottom row of numbers contains the following value for each of the categories.
A group of 40 students in a library was sampled and the type of laptop they were using was examined. It was found that 16 were using HP, 10 were using Lenovo, 6 were using Dell, 5 were using Microsoft, and 3 were using Apple. a. Use the given information to complete the following table: Laptop Type Frequency Relative Frequency HP % Lenovo c. What proportion of the students use HP? b. How many degrees will the segment representing "Lenovo" have on a pie chart? % d. What is the relative frequency for Apple? Dell Microsoft Apple

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