Alexandra has 78 emails in her inbox. She deletes 47 emails.How many emails are left in het inbox? Draw jumps and level the numb
2 answers:
Answer: There are 31 emails left in her inbox.
Step-by-step explanation:
Since we have given that
Number of emails in her inbox = 78
Number of emails she deleted = 47
We need to find the number of emails that are left in her inbox.
So, for left we would use "Subtraction operator"
So, Number of emails left in her inbox = Number of emails in her inbox - Number of emails she deleted.
Hence, there are 31 emails left in her inbox.
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The number of ways people can get off the elevator is 604800 ways.
In this question,
Number of people, n = 7
Number of floors, r = 10
The first person can leave elevator in one of 10 ways. Then second person has to choose from one of remaining 9 floors. Then third person in 8, fourth in 7 ways and so on.
Number of ways people can get off the elevator can be calculated as
⇒
⇒
⇒
⇒
⇒
⇒ 604800 ways.
Hence we can conclude that the number of ways people can get off the elevator is 604800 ways.
Learn more about number of ways here
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Answer:
a)
We can use the following excel code: "=2*(1-T.DIST(2.48,9,TRUE))"
b)
We can use the following excel code: "=2*(1-T.DIST(3.95,9,TRUE))"
c)
We can use the following excel code: "=2*(1-T.DIST(2.69,9,TRUE))"
d)
We can use the following excel code: "=2*(1-T.DIST(1.88,9,TRUE))"
Step-by-step explanation:
For this case we are testing the following system of hypothesis:
Null hypothesis:
Alternative hypothesis:
The sample size is n=10, so then the degrees of freedom are given by:
In order to calculate the p value we can use the fact that we are conducting a bilateral test so then the p value is given by:
Where represent the calculated or observed statistic.
a) t0= 2.48
We can use the following excel code: "=2*(1-T.DIST(2.48,9,TRUE))"
b) t0= -3.95
We can use the following excel code: "=2*(1-T.DIST(3.95,9,TRUE))"
c) t0=2.69
We can use the following excel code: "=2*(1-T.DIST(2.69,9,TRUE))"
d) t0=1.88
We can use the following excel code: "=2*(1-T.DIST(1.88,9,TRUE))"