Which of the following represents the component of the chi square stani statistic for Toshiba?

 

A market research firm wants to know if there is an obvious leader among the five most popular manufacturers of laptop computers, or whether they are all about equally popular. They ask a random sample of 250 people which brand of computer they trust most. Here are the results: Most-trusted brand Frequency a. b. C. d. I. II. III. Apple 42 1. Which of the following is an appropriate null hypothesis for the company to test? a. 1 = = H = l = H b. The observed counts are all equal to 50 c. People in the population are equally likely to identify each the five brands as most trustworthy d. For at least one of the brands, the proportion of people in the population who trust this brand most is different from the other four proportions. e. The observed counts are equal to the expected counts. Lenovo 66 2. Which of the following are conditions that must be met in order to test this hypothesis using a chi-square test? Asus 45 I and II only II and III only I and III only Dell 43 Il only e. I, II and III Each respondent is randomly selected from the population. All expected cell counts are at least 5. Toshiba 54 The population is normally distributed, or n is large enough for the central limit theorem to apply.