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Someone claims that Bergen County high school students on average score higher on the SAT than high school students from Morris County. You collect samples of 100 students from each of the two counties and obtain the following results: The mean score for Bergen County students was 1015 with a sample standard deviation of 106, the mean score for Morris County students was 1022 with a sample standard deviation of 118.
What is a hypothesis test? Why do we need to use them to make decisions about relating sample results to the population; why can't we just make our decisions by the sample value?
What is the most appropriate statistical test in situation and are there significant differences in the number of deliveries?
Suppose x follows a distribution with density function: f(x)=C*abs(x-2), 0 =
To conclude the effect of a new fertilizer on productivity of tomato plants one group of plants is treated with the new fertilizer as a second group is grown without such treatment. The number of ripe tomatoes produced by each group is counted.
Entrepreneurship researchers are interested in the relationship between entrepreneurial behaviour of firms, such as innovation or new business venturing, and performance indicators, such as sales growth or profitability.
consider the following. give your answers correct to two decimal places.a find the standard score z such that the area
Twelve case of leukemia are reported in people living in a particular census tract over a five year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cance-incidence rates?
If W denotes the total number of spaces one moves under these special conditions, find the mean and standard deviation of W.
a drawer contains 10 red socks 4 blue socks and 8 black socks. suppose you chose two socks at random. find the
The article should include a margin of error and confidence interval. Discuss the subject matter in the article, and interpret the results and what the confidence interval and margin of error mean as they apply to the specific subject matter.
what is stated by the alternative hypothesis h1 for an anova?a there are no differences between any of the populationsb
Why might driver be tempted not to use seat belt "just on this trip"?
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