The probability that twenty customers will visiting Target stores will be 0.0007979.
<h3>How to calculate the probability?</h3>
Your information is incomplete but the question will be solved based on the available information.
The probability an individual visiting Target purchases something is 0.70. Therefore, the probability that 20 customers visit will be:
= 0.70^20
= 0.0007979
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Answer:
Error Bound = 0.04
Step-by-step explanation:
Whenever we want to estimate parameter from a subset (or sample) of the population, we need to considerate that your estimation won't be a 100% precise, in other words, the process will have a random component that prevents us from always making the exact decision.
With that in mind, the objective of a confidence interval is to give us a better insight of where we expect to find the "true" value of the parameter with a certain degree of certainty.
The estivamative of the true difference between proportions was -0.19 and the confidence interval was [-0.23 ; -0.15].
The question also defines the error bound, as the right endpoint of the confidence interval minus the sample mean difference, so it's pretty straight foward:
Error Bound = 
The interpretation of this would be that we expect that the estimative for the difference of proportions would deviate from the "true" difference about
or 4%.
Answer:
B. 42 Mins
Step-by-step explanation:
you take .70x60mins and that is 42 mins.
No there isn’t enough water, 975 divided by 70 is 13.92 indicating there would only be enough water for 13 experiments and not 15