(b) Sarah decides to create a boxplot for each set of golf balls, as displayedin Figure 2.270275280285290295300306310315Figure 2With reference to Subsection 1.2 of Unit 11, state three ways in whichshe could improve the clarity of her presentation of the boxplots. 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

Boxplot : A boxplot could be a standardised 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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2. A scientist suspects that as a person's stress level changes, so does the amount of his or her impulse buying. With N=62, r = .38. a) What are the H, and Ha for this study? b) What conclusions should he draw? c) What other calculations should be performed to describe the relationship in these data?
A study conducted to see if teenagers drive at faster average speeds than the general population of drivers. The average speed of the driving population is 45mph. The null hypothesis is Ho=uaverage driving speed of teenagers = 45 mph. What is the alternative hypothesis?
What would the null and alternative hypotheses be for the average distance a person lives away from a toxic waste site is greater than 10.8 miles?
e) Suppose that the 3rd quartile is equal to 46. How much data is located above 46? Why?
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…
In the vertical-horizontal line illusion, the two lines are exactly the same length, but the vertical line appears to be much longer. To examine the strength of this illusion, a researcher prepared an example in which both lines were exactly 10 inches long. The example was shown to individual participants who were told that the horizontal line was 10 inches long and then were asked to estimate the length of the vertical line. For a sample of n = 25 participants, the average estimate was M = 12.2 inches with a standard deviation of s = 1.00. Calculate t statistic.
Here are the world record race times for women in the 10,000-meter run over several years. a) Which is the explanatory variable and which is the response variable? Year Race Time (seconds) 1967 2286.4 b) Make a scatterplot of these data. You do not have to draw the scatterplot for me. Describe what you see (form, direction, 1970 2130.5 1975 2100.4 strength, outliers). 1975 2041.4 c) Write the equation of the regression line for predicting race time from year. 1977 1995.1 1979 1972.5 d) Give the meaning of the slope of your line in terms of race time and year. What are the units of the slope in this problem? 1981 1950.8 1981 1937.2 e) What percent of the observed variation in 1982 1895.3 the race times can be explained by your 1983 1895.0 model? 1983 1887.6 f) Find the residual for the first data point or 1984 1873.8 the list (the 2286.4 seconds from 1967). 1985 1859.4 g) What does this linear model predict for th race time in the year 2075? Do you think 1986 1813.7 this is reasonable?…

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