Complete Question:
a) Is it plausible that X is normally distributed?
b) For a random sample of 50 such pairs, what is the (approximate) probability that the sample mean courtship time is between 100 min and 125 min?
Answer:
a) It is plausible that X is normally distributed
b) probability that the sample mean courtship time is between 100 min and 125 min is 0.5269
Step-by-step explanation:
a)X denotes the courtship time for the scorpion flies which indicates that is a real - valued random variable, and since normal distribution is a continuous probability distribution for a real valued random variable, it is plausible that X is normally distributed.
b) Probability that the sample mean courtship time is between 100 min and 125 min




From the probability distribution table:


Answer:
144 (If multiplying)
Step-by-step explanation:
18x8=144.
In a toss coin, the only result is a head or a tails. Therefore
that ½ of the time you can win or ½ of the time you can lose. Therefore the
probability of losing three games in a row is:
<span>P = (1/2) * (1/2) * (1/2)
P = 0.125</span>
<span>Therefore the answer is “True”.</span>
Answer:

Step-by-step explanation:
Remember that the range is the set of all y-values. Thus, since the minimum of the function is y=-1, then our range is
. In interval notation, we use brackets to show what's included and parentheses to show what's not included.
The answer to your question is 7.59 so shes right