Current Attempt in ProgressA past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test thisclaim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (inhours) are as follows.13.2 15.4 23.0 23.2 22.8 37.7 15 16.2 20.4 21.2Assume that the times spent on leisure activities by all aduilts are normally distributed. Using the 5% significance level, can youconclude that the average amount of time spent by American adults on leisure activities has changed? (Hint: First calculate the samplemean and the sample standard deviation for these data. Then make the test of hypothesis about a.)Round the sample standard deviation to three decimal places.The claim is

The random variable times spent on leisure activities follows normal distribution. We have to test…

Answered: A past study claimed that adults in…

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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Data were gathered on how high dolphins jump from the surface of the water based on body length. The following data was obtained from 10 randomly selected dolphins in Miami, Florida. Body Length (in feet) Height of Jump (in feet) 5.5 15 6 15 6.7 17.5 7.2 17 7.5 18.1 8.2 18.7 8.2 17.6 8.5 19.2 9 22.3 9.5 19.3 What is the value of r and its interpretation?
Age and Gender. The U.S. Census Bureau publishes census data on the resident population of the United States in Current Population Survey. According to that document, 7.3% of male residents are in the age group 20–24 years. a. If no association exists between age group and gender, what percentage of the resident population would be in the age group 20–24 years? Explain your answer.b. If no association exists between age group and gender, what percentage of female residents would be in the age group 20–24 years? Explain your answer.c. There are about 158 million female residents of the United States. If no association exists between age group and gender, how many female residents would there be in the age group 20–24 years?d. In fact, there are some 10.9 million female residents in the age group 20–24 years. Given this number and your answer to part (c), what do you conclude?
Read the following on attendance and grades, and answer the questions. A study revealed that students from a certain local college in Bulacan who attended class 95 to 100% of the time usually received a grade of 1.0 in the class. Students who attended class 80 to 90% of the time usually received a 1.5 or 1.75 in the class. Students who attended class less than 80% of the time usually received a 3 or a 5 or eventually withdrew from the class. Many factors affect a student’s grade in a course. One factor that has considerable control over is attendance. One can increase the opportunities for learning by attending class more often. a. From the information given, comment on the relationship between the variables Answer: b. What type of survey do you think is most appropriately used for the study? Answer: c. Do you think the use a random method for deciding who would be in the sample is appropriate? Why? Answer:
I only need help with the last 2 please
Marc takes a random sample of 14 dogs from the local animal shelter and weighs them. He obtains the following data: 9 25 32 40 41 45 47 50 53 53 62 79 94 106 What is the median for this data?
Use the following data set: 8, 3, 5, 2, 8, 4, 2, 6, 7, 5, 8 to answer questions The mean x .s... Select one: О а. 10 O b. 7.5 О с. 5.27 O d. 6
Moving to another question will save this response. Question 5 Obtain the five-number summary for the given data. The test scores of 15 students are listed below. 42 45 50 53 57 61 67 68 75 76 85 87 90 94 95 O 42, 53, 71.5, 87, 95 42, 52.25, 71.5, 85.5, 95 O 42, 53, 68, 87, 95 O 42, 52.25, 68, 85.5, 95 A Moving to another question will save this response. earch F2 DII F3 F4 F5 PrtS 5 W
pls answer thankyou
In a survey of1153 senior citizens in Virginia, 50% said that they wash their hands after attending a sporting event. a. Identify the sample and the population. b. Is the value of 50% a statistic or a parameter?

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