Your flight has been delayed: At Denver International Airport, of recent flights have arrived on time. A sample of flights is studied. Round the probabilities to four decimal places. Part 1 of 4
(a) Find the probability that all of the flights were on time.
The probability that all of the flights were on time is
.
Part 2 of 4
(b) Find the probability that exactly of the flights were on time.
The probability that exactly of the flights were on time is
.
Part 3 of 4
(c) Find the probability that or more of the flights were on time.
The probability that or more of the flights were on time is
.
Part 4 of 4
(d) Would it be unusual for or more of the flights to be on time?
It be unusual for or more of the flights to be on time since the probability is
.

Which number completes the inequality? 2/3 < _ < 7/9

If 5x - 2 = -12, then x = a) -50 b) -4.4 c) -2.8 d) -2

According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: μ=6.4 and ha: μ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.