a group of students decided to collect as many paise (1/100 RS.) from each member of the group as is the number of members. If t
1 answer:
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Answer:
The null and alternative hypotheses are:
Under the null hypothesis, the test statistic is:
Where:
is the sample mean
is the sample standard deviation
is the sample size
Now, the right tailed t critical value at 0.05 significance level for df = n-1 = 10-1 = 9 is:
Since the t statistic is less than the t critical value at 0.05 significance level, therefore,we fail to reject the null hypothesis and conclude that there is not sufficient evidence to support the claim that the average phone bill has increased.
Answer:
Precision = 0.625
Recall = 0.5
Step-by-step explanation:
Data:
Let: total documents = 10
relevant documents = 5
if 2 documents are removed, the total number of documents remaining will be
documents remaining = total - 2 documents
= 10 - 2
= 8 documents
therefore, the precision will be =
Recall =