Students conduct an experiment in lab where theyplace a speaker playing a constant 100 Hz tone on acart and record the frequency of the sound recordedby a microphone when the cart moves at differentspeeds towards the microphone. They want to see ifthere is a relationship between the speed the cartmoves and the frequency of the sound detected by themicrowave. Below is the data they collected from thisexperiment. Speed ofcart (m/s)Frequencуdetectedbymicrophone (Hz)100.0101.5103.0104.6106.2What type of experiment was this?05101520O An observational experiment because once thecart started moving students did not interactwith itA testing experiment because students wereactively manipulating an independent variableA testing experiment because students werecollecting quantitative dataAn observational experiment because studentswere exploring an unknown relationshipA testing experiment because students weretesting a hypothesis about how two quantitiesare related

Experiment : Frequency of 100Hz tone on card placed, At different speed of cart sound recorded by…

Answered: Students conduct an experiment in lab…

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 27a
Question 3 122 students at a college were asked whether they had completed their required English 101 course, and 79 students said "yes". Find the best point estimate for the proportion of students at the college who have completed their required English 101 course. Round to four decimal places.
Jóhannes plans to examine the salary of a middle manager in a large company. He collects data on salaries and how long they have been employed as middle managers with the aim of creating a model that can predict salaries with work experience. Jóhannes has data from 20 randomly selected middle managers who range from being new to the job to having 12 years of work experience. Jóhannes started by drawing the data and sees that the relationship is linear. He also calculates some light sizes that can be seen below: Convert Average Standard deviation Salary 761041 238473 Job experience 5,65 3,71 He also calculated the correlation coefficient between wages and work experience and obtained a r = 0.82. a) Find an equal regression line for Jóhannes's modelb) What is the explanatory power of the model and what does it tell us?c) How much does a middle manager's salary increase in five years according to the model?d) Use the model to predict the salary of a middle manager with 20 years…
question 45 and 46
Alligators have shown the ability to determine the direction of an airborne sound. But can they locate underwater sounds? This was the subject of a study. Alligators were monitored for movement toward a sound produced from a submerged diving bell. Movements within a 180° arc of the direction toward the sound were scored as movements toward the sound; all movements in other directions were scored as movements away from the sound. Consequently, the researchers assumed that the proportion of movements toward the sound expected by chance is 180°/360° = 0.5. In a sample of n= 50 alligators, 29 moved toward the underwater sound. Complete parts a through e below. a. Give the null and alternative hypotheses for testing whether the true proportion of alligators that move toward the underwater sound is higher than expected by chance. Let p be the true proportion of alligators that move toward the underwater sound. Choose the correct answer below. O A. Ho: p>0.50 vs. Ha: p= 0.50. O B. Ho: p= 0.50…
33
There is a strong negative association between latitude (angular distance north or south of the Earth's equator) and skin cancer rates. (i) Does this mean that low latitudes cause skin cancer rates to increase? Explain your answer in one or two sentences.
Question 2 Find the line of best fit for the data set: (1,2), (2,3), (4,1). y = 3 – x Oy = 2 - Oy = 3 –z Oy =2-z
A researcher studies water clarity at the same location in a lake on the same dates during the course of a year and repeats the measurements on the same dates 5 years later. The researcher immerses a weighted disk painted black and white and measures the depth (in inches) at which it is no longer visible. The collected data is given in the table below. Complete parts (a) through (c) below Observation 3 4 Date 1/25 3/19 5/30 7/3 9/13 11/7 Initial Depth, X, 57.1 67.5 70.3 41.2 70.9 44.3 Depth Five Years Later, Y, 54.6 67.7 67.4 41.9 66.6 47.6 a) Why is it important to take the measurements on the same date? O A. Those are the same dates that all biologists use to take water clarity samples. O B. Using the same dates maximizes the difference in water clarity. O C. Using the same dates makes it easier to remember to take samples. O D. Using the same dates makes the second sample dependent on the first and reduces variability in water clarity attributable to date. b) Does the evidence…

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