IV|I Union leaders at a company want to seek workers' opinions on a proposed labour-management contract. The table below shows the survey responses. We wish to conduct a Chi-Square test of independence. What is the critical value if the test is conducted at the 5% signicance level? State your answer to 2 decimal places. In a study conducted on the efficacy of a recently developed COVID-19 vaccine, a sample of 384 patients was taken. It was found that the vaccine is 75.2% effective against COVID-19 infection. What is the upper limit of the 95% confidence interval estimate of the proportion of all patients for whom the vaccine was effective. (Use at least 4 decimal places in your calculations and state your final answer to 4 decimal places. Report question issue ! Notes DID SO 0 30 030 030 030 05010 1 Mark A company is planning to market a new flavour of ice-cream. They select a random sample of 200 individuals and ask them to taste the new ice-cream. 140 of those selected like the new flavour. What is the point estimate of the proportion of all people who will like the new flavour? (State your answer to 2 decimal places, not as a percentage)Mark The length of steel bars produced by a machine are normally distributed with a mean length of 30.2cm and standard deviation of 6.2cm. What is the percentage of steel bars that are expected to be longer than 41 cm. State your answer to 2 decimal places. (Hint: You are not required to state the unit as it is already provided in the response) % Report question issue Notes +