A safety officer wants to prove that the average speed of ca…

A safety officer wants to prove that the average speed of cars driven by a school is less than 25 mph.  Suppose that a random sample of 14 cars shows an average speed of 24 mph, with a standard deviation of 2.2 mph.  Assume that the speeds of cars are normally distributed.   a.  What are the appropriate null and alternative hypotheses? Note: Don’t worry about inputing symbols if you don’t know how. Instead, type the word of the symbol (i.e. x-bar, p-hat, mu, pi) or use proper terminology (i.e. sample mean, population mean, etc.). : [null] : [alth]   b. Verify necessary data conditions for using a t statistic.   [verify]   c.  Rounding to 4 decimal places, what is the value of the test statistic?    = [TestStatistic]   d.  Rounding to 4 decimal places, what is the p-value?   p-value = [pvalue]  

Suppose you would like to know the Thai baht (THB) price of…

Suppose you would like to know the Thai baht (THB) price of the Malaysian ringgit (MYR).  For these emerging currencies, it is unlikely that cross-rate quotes will be available except possibly at Thai or Malaysian banks. If we ignore bid/ask prices and use triangular arbitrage with the $, and MYR3.1348/$ and THB30.157/$, then the THB/MYR exchange rate will be:

Suppose that a 95% confidence interval for the proportion of…

Suppose that a 95% confidence interval for the proportion of teen drivers who were involved in a car accident is found to be (0.1425, 0.2875).   a.  What is the point estimate for the population proportion of teen drivers who were involved in a car accident?