4. The following are the scores of the male andfemale students in Statistics. Determine whetherthe male students perform better in the subjectthan the female students. Use 0.05 level ofconfidence.Males32254426253730256527221552X (g) Y (cm) X (g) Y (cm)155 28 150 28139 25 138 26100 20 153 29145 27 143 27121 23 114 21128 20 130 25143 2812521Females5. The researcher wishes to find out the relationshipbetween the weight and the length of fishcultured at the fishpond using bread meal assupplemental feed. Is there a significant degreeof relationship between the weight and length ofthe fish? Use 0.05 level of confidence andanswer the ff:1. How much is the weight if it measures 30 cm?2. How long is the fish if it weighs 120 g?

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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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A local doctors office recorded the wait times for 70 patients on a saturday afternoon and organized he times in the histogram below a. what percent of people waited more than 15 minutes? b. what percent of people waited less than 20 minutes? c. what percent of people waited less than 5 minutes given they waited less than 20 minutes?
The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.25 and the sample statistics include n=1150 subjects with 265 saying that they smoked a cigarette in the past week. Find the value of the test statistic.
You are a researcher studying a certain species of fish in a local lake. You gather a random sample of 19 fish of this species and record the lengths (in centimeters) of the fish. The data is displayed in the table below. Estimate the mean length of all fish of this type in the lake. Use a 99% confidence level. 9.1 9 8.6 5.8 9.8 7.4 9.1 9.5 8.2 8.9 9.3 7.8 9 9.6 10.4 13.6 7.2 10.1 8.9 a) Find the confidence interval: b) What is the margin of error of your interval? c) Interpret your 99% confidence interval in context
Is there a relationship between Facebook use and age among college students? The following two-way table displays data for the 219 students who responded to the Age Younger (18–22) Middle (23–27) Older (28 and up) Facebook user? Yes 78 49 21 No 4 21 46 What percent of the students who responded were Facebook users? What percent of the students in the sample were aged 28 or older? What percent of the students who responded were older Facebook users? What percent of the Facebook users in the sample were younger students? Find the distribution of Facebook use for each of the three age groups. Make a stacked bar graph to compare these Describe what the graph in part (e) reveals about the association between age and Facebook
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Sam took 4 courses last semester: Spanish, Physics, Biology, and Calculus. The means and standard deviations for the final exams, and Sam's scores are given in the table below. Convert Sam's score into z scores. Subject Mean Stand. dev. Sam's score Sam's z score Spanish 44 12 47 Physics 60 14 84.5 Biology 77 10 82 Calculus 70 12 79 On what exam did Sam have the highest relative score?(Enter the subject.) In the Biology class, there was a student with a z-score of 1.2. What score did that student earn on the exam?
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4. The following are the scores of the male and female students in Statistics. Determine whether the male students perform better in the subject than the female students. Use 0.05 level of confidence. Males 32 25 44 26 25 37 30 25 65 27 22 15 52 Females