9514 1404 393
Answer:
45, 56, 67
Step-by-step explanation:
Terms of an arithmetic sequence have a common difference. That is, the next term is found by adding that difference to the previous term.
Here, the difference is 12 -1 = 11, so each term is 11 more that the previous one. The next terms are found by repeatedly adding 11.
34 + 11 = 45
45 + 11 = 56
56 + 11 = 67
The next three terms are 45, 56, 67.
Answer:
The conclusion is that the average level of decibel at the library has changed since the installation of a new computer plug
Step-by-step explanation:
From the question we are told that
The population mean is
The sample size is
The sample mean is
The sample standard deviation is
The level of significance is
The Null Hypothesis is
The Alternative Hypothesis is
The test statistics is mathematically evaluated as
substituting values
The negative sign show that this is a left-tail test
Now the critical value of the level of significance obtained from the critical values table is
Now comparing the critical value of the and the test statistics we see that critical value is greater than the test statistic which implies that the null hypothesis is rejected.
The conclusion is that the average level of decibel at the library has changed since the installation of a new computer plug