Question 4. In 2019, a study found the average American spent 2.77 hours a week in videocalls, with a standard deviation of 1.8 hours. Last week I was in video calls for 10 hours.a) If we assume the data is normally distributed with the given parameters,what portion of the population spends less time in video calls than I do?b) Doyouthink this data from 2018 is still accurate in May 2021? Why or why not?

Answered: Image /qna-images/answer/94588813-a3eb-4db9-847b-78d3ccdc7f2a.jpg

Answered: Question 4. In 2019, a study found the…

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 2Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 6.5 inches and a standard deviation of 0.7 inches.a. In what range would you expect to find the middle 82% of most head breadths? (Round your answer to 2 decimal places.)b. If you were to draw samples of size 60 from this population, in what range would you expect to find the middle 82% of most averages for the breadths of male heads in the sample? (Round your answer to 2 decimal places.)
The First Chicago Bank is reviewing its service charges and interest-paying policies on checking accounts. The daily balance of a checking account is defined to be the balance in the checking account at 2:00pm. The bank has found that for all personal checking accounts the mean of all the daily balances is $ 800 and the standard deviation is $175. In addition, the distribution of personal checking account daily balances can be approximated very well with a normal model. Question 1. What percentage of the bank's customers carry daily balances between $700 and $1,000? % (Use 2 decimal places in your answer. Note that the answer is requested as a PERCENT, that is, a value between 0 and 100) Example, if you got 0.1234, you should enter it as 12.34 Question 2.The bank is considering paying interest to customers carrying daily checking account balances in excess of a certain amount. If the bank does not want to pay interest to more than 4% of its checking account customers, what is the…
Answer part c and d frq styled
Consider the data from the Anthropology 105 class. The mean for women is 64.33 in and the standard deviation is 2.64 in. The average height of men in the US is approximately 5ft 10in. What proportion of women represented here are shorter than the average man?
QUESTION 1 A health researcher read that a 150-pound college-aged, male can burn an average of 530 calories per hour playing tennis with a standard deviation of 25 calories. 40 college-aged males were randomly selected at a commuter school and the mean number of calories burned per hour playing tennis was 540 calories. Do college-aged male tennis players at the commuter school burn more calories per hour than the college-aged, male tennis player population? Test with a 0.05 significance level. What are the hypotheses? Null and Alternate
Suppose there is a city where the mean cost per month of a one-bedroom apartment is $1,500, with a standard deviation of $250. Approximately what percentage of one-bedroom apartments in the city cost between $750 and $1,000?
The mean age of all 663 used cars for sale in a newspaper one Saturday last month was 7.5 years, with a standard deviation of7.1 years. The distribution ads, a reporter randomly selects 50 of these used cars and plans to visit each owner to inspect the cars. He finds that the mean age of the 50 cars he sam Complete parts a through c. a From the problem statement, which of the values 75,7.1, 7.9, and 5.6 are parameters and which are statistics? The value 7.5 is a The value 7.1 is a The value 7.9 is a The value 5.6 is a
please answer question 2 below
3. Based on a survey, the average monthly allowance of the international students in Oxford University is ₱25,000 with a standard deviation of ₱1,000.00. The monthly allowance is normally distributed, what is the z-score of an international student with a monthly allowance of ₱23,000.
Question 5 The mean age when smokers first start is 13 years old with a population standard deviation of 1.9 years. A researcher thinks that smoking age has significantly changed since the invention of ENDS-electronic nicotine delivery systems. A survey of smokers of this generation was done to see if the mean age has changed. The sample of 35 smokers found that their mean starting age was 12.4 years old. Do the data support the claim at the 5% significance level? What are the correct hypotheses? Ho: Select an answer Critical Values = + Submit Question H₁: Select an answer ✓ ? ✓ Based on the hypotheses, find the following: Test Statistic z = years years (Give answer to at least 4 decimal places) (Give answer to at least 4 decimal places) Based on the above we choose to Select an answer The correct summary would be: [Select an answer mean age smokers first start is different than 13. that the claim that the
Question 2 The weekly rental prices of rental properties are normally distributed with a mean of $250 and a standard deviation of $50. Calculate the percentage of properties with weekly rental price lower than $150 per week. Answer: Click or tap here to enter text. Calculate the percentage of properties with weekly rental price higher than $300 per week. Answer: Click or tap here to enter text. Calculate the percentage of properties with weekly rental price between $150 and $300 per week. Answer: Click or tap here to enter text.

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