Simon has a quarter, dime, nickel, and penny in his pocket. He wants to buy a snack at the canteen that costs 40¢. If he pulls o
1 answer:
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Answer:
And we can use the normal standard table and the complement rule and we got:
And the best answer would be:
C 0.07
Step-by-step explanation:
Let X the random variable who represent the amount of soda filled in large bottles and we know this:
And we want to find this probability:
And for this case we can use the z score formula given by:
And replacing we got:
And we can use the normal standard table and the complement rule and we got:
And the best answer would be:
C 0.07
Answer:
97
Step-by-step explanation:
We are asked to find the size of sample to be 95% confident that the error in psychologist estimate of mean reaction time will not exceed 0.01 seconds.
We will use following formula to solve our given problem.
, where,
,
,
.
Substitute given values:
Therefore, the sample size must be 97 in order to be 95% confident that the error in his estimate of mean reaction time will not exceed 0.01 seconds.