A sports equipment manufacturer has developed a new reasonably pricedgolf ball that it hopes will allow average golfers to hit the ball straighter.A concern is that this new technology might impact on the distance that theball travels. To compare distances, Sarah, a company researcher, conductsan experiment where 20 current balls and 20 new balls are subjected todistance tests, using a mechanical hitting device for consistency.The results of the tests, with distances given to the nearest metre, are givenin Table 1.Table 1 Distances travelled by golf ballsCurrent golf ballNew golf ball299292292291293285295288283273280305280286311308292291283296292294309281311286302302294296297303287298282293300290297284 (d) Sarah realises that the top boxplot represents the data for the currentgolf balls, and the bottom boxplot represents the data for the new golfballs. She tries to interpret what the boxplots are telling her by makingthe statements below. For each one, state whether you agree or disagreewith her interpretation, and explain why you think that she is correct orincorrect.(i) "On average, the distance travelled by the new golf balls was lessthan the distance travelled by the current ones.'(ii) There was less variation in the distances travelled by the currentgolf balls than in the distances travelled by the new golf balls.'(iii) 'More than half of the current golf balls travelled a distance greaterthan the median.'

Boxplot : A boxplot could be a standardized technique of portraying knowledge distribution supported…

Answered: A sports equipment manufacturer has…

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 psychologist claims that less than 25.8% of the population suffers from professional problems due to fear of public speaking. In a random sample of 357 adults it was found that 96 of them suffer from fear of public speaking. Use p-value method to agree or disagree with the true percentage of the population that suffers from fear of public speaking. Show all your work and enter the test statistic. show formulas and draw all curves.
Before every flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The aircraft can carry 40 passengers, and a flight has fuel and baggage that allows for a total passenger load of 6,250 lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than 6,250 lb / 40 = 163 lb. What is the possiblity that the aircraft is overloaded? Should the pilot take any action to correct an overloaded aircraft? Assume that the weights of men are normally distributed with a mean of 177.3 lb and a standard deviation of 39.3 The probability is approximately
The head of a computer science department is interested in estimating the proportion of students entering the department who will choose the new computer engineering option. A preliminary sample indicates that the proportion will be around 0.35. Therefore, what size sample should the department head take if she wants to be 95% confident that the estimate is within 0.10 of the true proportion?
Please help with homework problem.
A man who moves to a new city sees that there are two routes he could take to work. A neighbor who has lived there a long time tells him Route A will average 5 minutes faster than Route B. The man decides to experiment. Each day he flips a coin to determine which way to go, driving each route 20 days. He finds that Route A takes an average of 45 minutes, with standard deviation 3 minutes, and Route B takes an average of 49 minutes, with standard deviation 5 minutes. Histograms of travel times for the routes are roughly symmetric and show no outliers. Complete parts a and b. (...) a) Find a 95% confidence interval for the difference between the Route B and Route A commuting times, (µÂ ¯ µÃ) - The confidence interval is (.). (Round to two decimal places as needed.)
Before every flight, the pilot must verify that the total weight of the load is less than the maximum allowable load for the aircraft. The aircraft can carry 37 passengers, and a flight has fuel and baggage that allows for a total passenger load of 5,994lb. The pilot sees that the plane is full and all passengers are men. The aircraft will be overloaded if the mean weight of the passengers is greater than 5,994/37lb=162lb. What is the probability that the aircraft is overloaded? Should the pilot take any action to correct for an overloaded aircraft? Assume that weights of men are normally distributed with a mean of 181.6lb and a standard deviation of 36.2. The probability is approximately?
Please answer the following question by stating conditions and test required. Please show how to answer using graphing calculator if possible.
1.) Write your solution A. Determine the 1" quartile, 2 quartile, 3rd quartile and interquartile range (IQR), given the scores of; 11, 24, 23, 11, 13, 17, 15, 19, 21, then interpret each of your answer. B. Solve for the Percentile Rank of 17.
Use a z-table such as https://www.math.arizona.edu/~rsims/ma464/standardnormaltable.pdf or an online calculator such as http://onlinestatbook.com/2/calculators/normal_dist.html to answer the following question: This question again refers to the study on blood pressure. What proportion of the population has a blood pressure that is below the value 101.3 mmHg for a normally-distributed set of blood pressures with a mean of 120.1 mmHg and a standard deviation of 15.1 mmHg? Express your answer as a percentage rounded off to 1 decimal place. For the value from the previous question you just answered, what percentage of the population would have a blood pressure higher than this value? Express your answer as a percentage rounded to 1 decimal place and show your calculations below.
A researcher thinks that watching violent televisions increases aggressive behavior in children. To test this hypothesis, she randomly assigns 48 children into one of 3 groups (no violent TV, a little violent TV, or a lot of violent TV) and observes their playground behavior for three weeks and measures it for violence and intensity. For the variable “amount of TV” (as it appears in this problem), what is the scale of measurement? a. nominal b. ordinal c. interval d. ratio A researcher thinks that watching violent televisions increases aggressive behavior in children. To test this hypothesis, she randomly assigns 48 children into one of 3 groups (no violent TV, a little violent TV, or a lot of violent TV) and observes their playground behavior for three weeks and measures it for violence and intensity. If the researcher’s hypothesis is correct, which of the following conclusions could be drawn? a. Fail to reject the null, watching violent TV does not increase…
A researcher wants to test the association between 4 stress levels and 8 choices of favorite color in mature adults. The Chi-square value coputed was 30.72. At the 0.5 level what should the researcher conclue. Show work.

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