An analyst working at Wyson claims that the number of service calls on equipment sold is not more than 15 per week on the average. To investigate this claim, service records were checked for 36 randomly selected weeks and the average service call is found as 16. It is known that the variance of the number of service calls is 9. (Please consider 4 significant digits in your results) c) What is the probability of failing to reject the null hypothesis if the true value of average number of service calls is 10? d) If the analyst wants to design the hypothesis test so that is the average number of calls differs by 1, the test will detect this with 0.9 probability. What is the sample size required?
Contingency Table
A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.
Binomial Distribution
Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.
An analyst working at Wyson claims that the number of service calls on equipment sold is not more than 15 per week on the average. To investigate this claim, service records were checked for 36 randomly selected weeks and the average service call is found as 16. It is known that the variance of the number of service calls is 9.
(Please consider 4 significant digits in your results)
c) What is the probability of failing to reject the null hypothesis if the true value of average number of service calls is 10?
d) If the analyst wants to design the hypothesis test so that is the average number of calls differs by 1, the test will detect this with 0.9 probability. What is the
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