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Mr. Jones wanted to check if there was an observable impact of a particular worksheet on his students' test scores for Chapter 1. His idea was to test if there was a significant variation in the average test score of the class that used the worksheet in comparison to the class that did not. In the class before lunch, he used the worksheet but not the class after lunch. He has 23 students in each of the two classes. Their test scores are below:
Before Lunch:
86
79
59
45
98
67
81
80
32
72
35
84
31
60
57
20
68
43
24
16
58
82
After Lunch:
23
74
46
38
90
14
63
51
18
56
44
70
27
33
30
95
a. Test are using?
b. H0 (null hypothesis) and Ha (alternative hypothesis)?
c. Calculate the statistic.
d. Decision does this inform to make and why? ( may use the critical value in the chart or the calculated p-value, but must indicate what are doing.)
e. Conclusion that correctly responds to the question. report statistic ex. [(df)=1.1, p<.05]
Estimate the regression parameters, the infant mortality rate for a country with a net food supply of 2900 calories per person per day, and draw the regression line on the same graph with the scatter diagram.
Discuss the ways in which Wi-Fi is being used to support mobile computing and m-commerce.
The mean number of passengers per cruise is 1,820 and the standard deviation is 120.
The university policy department must write, on average, five tickets per day to keep department revenues at budgeted levels. Suppose the number of tickets written per day follows a Poisson distribution with mean of 6.0 tickets per day. Find the p..
Using the Internet. Return to the study in Exercise, which found that 130 of 200 first-year students said that they used the Internet frequently for research.
A college has 25000 students. To estimate the percentage of commuting students, a simple random sample of 900 students were selected for a survey.
The U.S. Bureau of Labor Statistics released hourly wage figures for western countries in 2000 in the manufacturing sector. The hourly wage was $24.01 in Germany, $22.00 in Japan, and $19.86 in the United States.
A survey showed that 23 % of college students read newspapers on a regular basis and that 83 % of college students regularly watch the news on TV. The survey also showed that 20 % of college students both follow TV news regularly and read newspape..
Traffic forecasters at the Minnesota Department of Transportation (MDOT) use regression analysis to estimate weekday peak-hour traffic volumes on existing and proposed roadways. In particular, they model y, the peak-hour volume (typically, the vol..
What are three differences between arteries and veins? Provide an example that highlights the differences identified.
according to a study published by a group of sociologists at the university of massachusetts approximately 49 of the
suppose you want to sample the music of a band you havent heard before. youre given 5 cds each with 12 tracks. youll
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