The value of the test statistic for mean pulse rate

Claim: The mean pulse rate​ (in beats per​ minute) of adult males is equal to 69.3 bpm. For a random sample of 144 adult​ males, the mean pulse rate is 68.4 bpm and the standard deviation is 10.9 bpm. Complete parts​ (a) and​ (b) below.

Leah is flying from Boston to Denver with a connection in Chicago

Leah is flying from Boston to Denver with a connection in Chicago. The
probability her first flight leaves on time is 0.15. If the flight is on time, the
probability that her luggage will make the connecting flight in Chicago is 0.95, but
if the first flight is delayed, the probability

Sample statistics homework

Sample statistics homework are presented to prepare students for their exams. Example: On average 2 new checking accounts are opened per day at the Farmer’s Bank. What is the likelihood that for a particular day at least 1 new account is opened?