Question

Hypothesis Problems For the following hypothesis tests: a. State the null (Ho) and alternative (Hi) hypotheses b. State the type of test (right-tailed, left-tailed, or two-tailed) c. State the multiplier for an a (level of significance) of .05. The Chamber of Commerce states that only 15% of Boston tourists stay more than 2 days. A new chamber employee feels that the percentage staying more than 2 days is greater than 15%, and plans to sample a set of tourists to test his feeling. I. The local union claims that 75% of all union members support a strike if their basic workplace demands are not met. A company negotiator believes that this percentage is too high and plans to conduct a sample test to check out this belief. 2. Medical statistics state that 30% of all people over 50 get a annual physicals. A doctor does not believe that this is true and plans to test his theory by sampling 100 individuals over 50. 3, , 30 For the following two tests can you reject the null hypotheses? 4. An automobile dealership is told that an average of 48.3 cars is sold each month. The owner of the dealership believes that this claim is high. He plans to test this belief by sampling sales data from 36 dealerships. State the null and alternative hypotheses: a. What type of test is this (two-tailed, etc.)? b. lier is used?- Draw a pictur of the probability c. At an "a" of .10, what multipl distribution nds widet distribution and shade in the critical region(s). d. The owner's test sample results in a sample mean of 45.4 cars sold with a standard deviation of 15.4 cars? Where does this mean fall on the plot (preceding page)? Can we reject the null hypothesis? e. 5. The Quincy Chamber of Commerce believes that, for the city, the mean family income is $12,250. (Yikes!!!) One of the staff members believes that this average is not correct. She runs a test n a sample of 135 families and finds a mean of $11,500 with a standard deviation of $3,180. State the null and alternative hypotheses: a. What type of test is this (two-tailed, etc.)? b. dhis is tuo toded test At an “a" of .05, what multiplier is used? distribution and shade in the critical region(s). ·Draw a picture of the probability c. 2.74 Cwhiol vabue-1.97 d. Plot the results of the test on the above plot. e. Looking at the plot, can we reject Ho?

Answer 1

2 6448 가 is one/11, 2, eaf 548 1 5