Answer:
2.729
3.4052
3.45
3.5
Step-by-step explanation:
Answer:
B. 0.0625
Step-by-step explanation:
Given that the program has graduated and undergraduates enrolled,
Let the probability of selecting a graduate = p(g)
And the probability of selecting an undergraduate = p(u)
p(g) = p(u) = 50% = 0.5
Therefore,
Probability of selecting 4 students who are undergraduates
=p(u)p(u)p(u)p(u)
= 0.5 × 0.5 × 0.5 × 0.5
= 0.0625
The right option is B
Answer:
Then, it costs $2120 to order 1000 pens and 2000 notebooks.
Step-by-step explanation:
The Students' Union needs to order 1000 pens and 2000 notebooks. The price per pen when buying 1000 of them is 60c. The price per notebook when buying 2000 of them is 76c.
Then the total of money needed to order 1000 pens and 2000 notebooks is:
Total Money = 1000 × 0.60 + 2000 × 0.76 = $2120
Then, it costs $2120 to order 1000 pens and 2000 notebooks.
Answer:
b. We are 95% confident that the proportion of coworkers who went on a vacation last year away from home for at least a week is between 50% and 66%.
Step-by-step explanation:
A confidence interval at the level of x% for a proportion being between a and b means that we are x% sure that the true proportion of the population is between a and b.
In this problem, we have that:
95% C.I is (0.5, 0.66)
Interpretation: 95% confident that the true proportion is between 0.5 and 0.66.
The correct answer is:
b. We are 95% confident that the proportion of coworkers who went on a vacation last year away from home for at least a week is between 50% and 66%.