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2 answers:
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Answer:
A. 30.144
Step-by-step explanation:
This is a Chi-Squared test
Given:
- The significance level is 5%, so
To use the Chi-Square distribution table, you need to know two values:
- Degrees of freedom = (n - 1)
- Significance level
Degrees of Freedom = n - 1 = 20 - 1 = 19
The significance level is 5%, so
This is a one-tailed test since so Upper tail area = 0.05
Reading from the table (attached), the critical value is: 30.144
(This means that we reject if the test statistic is greater than 30.144)
Answer:
a₅₂ = - 212
Step-by-step explanation:
The nth term of an arithmetic sequence is
= a₁ + (n - 1)d
where a₁ is the first term and d the common difference
Here a₁ = - 8 and d = a₂ - a₁ = - 12 - (- 8) = - 12 + 8 = - 4 , then
a₅₂ = - 8 + (51 × - 4) = - 8 - 204 = - 212