binomial experiment with n=6 trials where the probability of success on a single trial is p=.20 find P(0< r greater than or equalt to 2).

A sample of n = 4 scores is selected from a population with µ = 70 and s = 10. The probability of obtaining a sample mean greater than 65 is p = 0.8413.  True  False

Person's last name X X2 sarron 6 36 jaxon 5 25 jill  4 16 chavez 6 36       Totals This activity involves testing a hypothesis about a population mean μ, where σ, the population standard deviation is unknown. We will test a hypothesis about the number of letters in students' last names. The claim is that the average number of letters in students' last names is less than 7. Assume that the population standard deviation σ is not known and that s the sample standard deviation has to be calculated. a = ? critical value = ? degrees of freedom = ?  graph and label critical regions  mean = ? standard deviation = ?  conclusion = ? z = ?

A random sample of n= 4 is obtained from a normal distribution μ=30, σ=8. What is the probability the sample mean will be smaller than M = 22? Report to the thousandths