BUSI 230 HW 12.1 Testing Goodness of Fit Assignment solutions complete answers
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Can you conclude that the distribution of observed frequencies differs from that given by the expected frequencies? Use Excel and the -value method; use the =0.005 level of significance.
(a)Find the -value. Use Excel; round to four decimal places.
(b)Write a conclusion.
Following are observed frequencies. The null hypothesis is
H0: P1=0.20, P2=0.10, P3=0.10, P4=0.6
Can you conclude that the distribution of observed frequencies differs from that given by the null hypothesis? Use the =0.01 level of significance.
(a)Compute the expected frequencies.
(b)Find the -value. Use Excel; round to four decimal places.
Grade distribution: A statistics teacher claims that, on the average, 10.00 of her students get a grade of A, 15.00 get a B, 20.00 get a C, 30.00 get a D, and 25.00 get an F. The grades of a random sample of 100 students were recorded. The following table presents the results.
Can you conclude that the distribution of the grades differs from the teacher’s claim? Use the =0.05 level of significance.
(a)How many students got a D? How many got a C?
(b)Which grades were given more often and less often than expected?
(c)Write a conclusion.
False alarm: The numbers of false fire alarms were counted each month at a number of sites. The results are given in the following table.
Can you conclude that false alarms are not equally likely to occur in any month? Use the =0.01 level of significance.
(a) Find the -value. Use Excel; round to four decimal places.
(b) Write a conclusion.
