# Question: An education specialist is considering the use of instructional material

An education specialist is considering the use of instructional material on compact discs for a special class of third-grade students with reading disabilities. Students in this class are given a standardized test in May of the school year, and µ1 is the average score obtained on these tests after many years of experience. Let µ2 be the aver–age score for students using the discs, and assume that high scores are desirable.

(a) What null hypothesis should the education specialist use?

(b) What alternative hypothesis should be used if the specialist does not want to adopt the new discs unless they improve the standardized test scores?

(c) What alternative hypothesis should be used if the specialist wants to adopt the new discs unless they worsen the standardized test scores?

(a) What null hypothesis should the education specialist use?

(b) What alternative hypothesis should be used if the specialist does not want to adopt the new discs unless they improve the standardized test scores?

(c) What alternative hypothesis should be used if the specialist wants to adopt the new discs unless they worsen the standardized test scores?

**View Solution:**## Answer to relevant Questions

Suppose that we want to test the null hypothesis that an antipollution device for cars is effective. (a) Explain under what conditions we would commit a type I error and under what conditions we would commit a type II ...The sum of the values obtained in a random sample of size n = 5 is to be used to test the null hypothesis that on the average there are more than two accidents per week at a certain intersection (that λ > 2 for this Poisson ...A single observation of a random variable having a uniform density with α = 0 is used to test the null hypothesis β = β0 against the alternative hypothesis β = β0 + 2. If the null hypothesis is rejected if and only if ...Show that the rule on page 372 for calculating the expected cell frequencies applies also when we test the null hypothesis that we are sampling r populations with identical multinomial distributions. Test at the 0.05 level of significance whether the mean of a random sample of size n = 16 is “significantly less than 10” if the distribution from which the sample was taken is normal, = 8.4, and σ = 3.2. What are the ...Post your question