Number of classes: 8Data Set: Reaction times (in milliseconds) of 30 adult females to an auditory stimulus428295384336514422385426374312444386351467385414442429303451309306324411450389318360509416Construct a frequency distribution for the data. Use the minimum entry data as the lowerlimit of the first class.

Given: Reaction times(in milliseconds) of 30 adult females to an auditory stimulus.

Answered: Number of classes: 8 Data Set: Reaction…

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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Number of classes: 8 Data Set: Reaction times (in milliseconds) of 30 adult females to an auditory stimulus 428 295 384 336 514 422 385 426 374 312 444 386 351 467 385 414 442 429 303 451 309 306 324 411 450 389 318 360 509 416 Construct a frequency histogram of the data. (a) (b) 1234 5 67 8 0- 1234567 8 Class Class 83 (c) (d) 0- 1234 567 8 123 4 567 8 Class Class Frequency Frequency 4+ Frequency Frequency
Martha believes that a relaxation technique involving visualization will help people with mild insomnia fall asleep faster. She randomly selects a sample of 20 participants from a group of mild insomnia patients and randomly assigns 10 to receive visualization therapy. The other 10 participants receive no treatment. Each participant then is measured how long (in minutes) it takes him or her to fall asleep. Data: No Visualization treatment Treatment 22 19 18 17 27 24 20 21 23 27 26 21 22 23 24 18 27 19 22 22 2.
[Grouped data]
A student has taken 4 area exams designed to measure particular intellectual abilities. The following table identifies each test, summarizes its characteristics, and provides the student’s score on it. Assume that the possible scores on each test are normally distributed. Area Test ? ? Student’s Score Verbal Ability 58.50 6.50 63.00 Visualization 110.00 15.00 102.50 Memory 85.00 11.50 98.00 Spatial Relations 320.00 33.50 343.00 a. Change each student’s score to its z-score equivalent b. On which test did the student score in the highest position? c. On which test did the student score in the lowest position? d. What is the percentile rank of the student’s Verbal Ability? e. What percentage of the students who took the Spatial Relations test scored higher than the student? f. Between what two scores on Memory did the middle 95% of students lie? g. What percent of students had scores between X = 95 and X = 110 on Visualization?
#10).
A random sample of 42 earthquakes that have occurred between January 2015 and September 2017 was selected and for each earthquake the magnitude of the earthquake and the number of people killed was recorded. The data appear in the scatterplot below. 400 350 300 250 200 150 100 50 0 3 -50 4 5 6 7 8 9 10 -100 -150 Magnitude of Earthquake 8 Consider the scatterplot above question 2. Use this scatterplot to describe completely the relationship between the magnitude of the earthquake and the number of people killed. Positive and linear Negative, moderate, linear O Negative, strong, linear Positive, moderate, linear Number of People Killed ---
High Cholesterol: A group of eight individuals with high cholesterol levels were given a new drug that was designed to lower cholesterol levels. Cholesterol levels, in milligrams per deciliter, were measured before and after treatment for each individual, with the following results: Individual Before After 1 237 208 2 239 202 3 230 185 4 245 217 5 242 180 6 282 215 7 243 182 8 286 195 Send data to Excel Part: 0 / 2 Part 1 of 2 (a) Construct a 99.9% confidence interval for the mean reduction in cholesterol level. Let d represent the cholesterol level before treatment minus the cholesterol level after. Use the TI-84 calculator and round the answers to at least one decimal place.
Dr. Smith conducts research concerning the association between deception and trust of other individuals. She recruits six subjects to take part in their study. Each subject is also asked to "list the number of times you have lied in the past week," as a measure of deception. Also, each subject is asked, "on a scale of 1 to 7 (1 being none and 7 being a lot) how much do you trust individuals?" Here is the data: Ps Deception (X) 1 2 13 st 15 16 |4 3 7 2 5 H₁: | 13 The research hypothesis is that there is an association between deception and trust of people. ♦ Step 1. Express the substantive question as two statistical hypotheses. Ho: ◄► Trust (Y) 14 14 13 ♦ (O ◆ 6 13 14
Rock sole in the Bering Sea 1/2: "Recruitment," the addition of new members to a fish population, is an important measure of the health of ocean ecosystems. Here are data on the recruitment of rock sole in the Bering Sea from 1973 to 2000: Make a stemplot to display the distribution of yearly rock sole recruitment. Round to the nearest hundred (for example, 173 to 2 hundred, and 1702 to 17 hundred) and split the stems.
Fill this table with the missing columns: Interval Frequency Probability Probability Density 1 3 13 4 - 6 15 7-9 19 9 - 11 14 11-16 17 - 26 3
The serum cholesterol levels (in (a) 235, 230, 232, 211, 201, 191, 189, 208, 249, 198, 254, 257, 215, 220, 244 Send data to calculator (b) mg Find 40th and 75th percentiles for these cholesterol levels. (If necessary, consult a list of formulas.) The 40th percentile: dL The 75th percentile: ) of 15 individuals are mg dL mg dL X Ś

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Number of classes: 8 Data Set: Reaction times (in milliseconds) of 30 adult females to an auditory stimulus 428 295 384 336 514 422 385 426 374 312 444 386 351 467 385 414 442 429 303 451 309 306 324 411 450 389 318 360 509 416