A tire manufacturer has a 60,000-mile warranty for tread life. The manufacturer considers the overall tire quality to be acceptable if less than 8% are worn out at 60,000 miles.The manufacturer tests 250 tires that have been used for 60,000 miles. They find that 15 of them are worn out. With this data, we test the following hypotheses at the 5% significance level.H0: The proportion of tires that are worn out after 60,000 miles is equal to 0.08.Ha: The proportion of tires that are worn out after 60,000 miles is less than 0.08.The p-value is 0.15. Which conclusion is correct? Reject H0. Fail to reject H0. Accept H0.

The lifetime in miles for a certain brand of tire is normally distributed with a mean of 22,000 miles and a standard deviation of 3,100 miles The tire manufacturer wants to offer a money-back guarantee so that no more than 3% of tires will qualify for a refund. What is the minimum number of miles the manufacturer should guarantee that the tires will last? 27,828 miles 25,007 miles 15,800 miles 16,172 miles

The average life expectancy of tires produced by the Whitney Tire Company has been 40,000 miles.  Management believes that due to a new production process, the life expectancy of its tires has increased.  In order to test the validity of this belief, the correct alternative hypotheses is ___.Group of answer choicespopulation mean is greater than 40,000 milespopulation mean is greater than or equal to 40,000 milespopulation mean is less  than or equal to 40,000 milespopulation mean is less  than 40,000 miles

A test is being designed to compare the wearing quality of two brands of automobile tires. The automobiles will be selected and equipped with the new tires and then driven under "normal" conditions for one month. Then a measurement will be taken to determine how much wear took place. If a sample of cars will be selected randomly, equipped with one tire of brand A, and one tire of brand B (the other two tires are not part of the test), and driven for a month.

An interval estimate for the average distance car tyres lasted during their "lifetime" was reported to be 34578 kilometres to 38512 kilometres. This interval estimate was based on a sample of 46 tyres. The variance of the lifetime was determined from previous studies to be 48512333 km squared. What level of confidence can be attributed to this interval estimate? State your answer as a percentage, correct to the nearest whole number.

Formulating the HypothesesGoodyear has launched a new tyre, which, it claims, can travel more than 7,500 miles before it needs any replacement.Assuming that the ‘average distance travelled before replacement’ is given by μ, what would be the null and alternative hypotheses in this case?Ho: μ ≤ 7500 miles; Ha: μ ≠ 7500 milesHo: μ ≤ 7500 miles; Ha: μ > 7500 milesHo: μ = 7500 miles; Ha: μ ≠ 7500 milesHo: μ ≥ 7500 miles; Ha: μ < 7500 miles