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A new reading program may reduce the number of elementary school students who read below grade level. The company that developed this program supplied materials and teacher training for a large-scale test involving nearly 8500 children in several different school districts. Statistical analysis of the results showed that the percentage of students who did not attain the grade-level standard was reduced from 15.9% to 15.1%. The hypothesis that the new reading program produced no improvement was rejected with a P-value of 0.023.
a) Explain what the P-value means in this context.
b) Even though this reading method has been shown to be significantly better, why might you not recommend that your local school adopt it?
What is the range of temperatures and What is the range of temperatures and what are the effects of the potential failure?
A certain state lottery awards 418 prizes; 28-$200 prizes, 120-$25 prizes and 270-$20 prizes, for every 10,000 tickets sold.
Determine the critical value, z0, to test the claim about the population proportion p
a brewerys filling machine is adjusted to fill bottles with a mean of 32.8 oz. of ale and a variance of 0.006.
What is the critical F value for a sample of four observations in the numerator and seven in the denominator? Use a one-tailed test and the .01 significance level.
The average daily jail population in the United States is 706,242. If the distribution is normal and the standard deviation is 52,145, find the probability that on a randomly selected day the jail population is:
Pools sells above ground model for 'p' dollars each. The monthly revenue from the sale of the pool is given by
question let x denote the number of days with snowfall of at least 1 inch in a winter. during the past 121 winters
the number of arrivals per minute at a bank located in the central business district of a large city was recorded over
a) Define your random variables, and use them to express the farmer's net income. b) Find the mean of the net income. c) Find the standard deviation of the net income. d) Do you need to make any assumptions in calculating the mean? How ab..
The Heart of Darkness is one of the great literary criticisms of Imperialism in Africa. Marlow, the main character, is originally fascinated by the possibilities that exploring Africa has to offer a young man seeking his fortune and a name for him..
Explain the meaning of each term in the equation, then use the appropriate terms from the equation in presenting and explaining the possible sets of null and alternative hypotheses that can be tested.
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