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oportela23
31.03.2020 •
Mathematics
Which type of transformation is shown in the graph?
translation
reflection
rotation
dilatation
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Ответ:
Ответ:
1. Null Hypothesis,
:
{mean voltage for these two types of
batteries is same}
Alternate Hypothesis,
:
{mean voltage for these two types of
batteries is different]
2. Test Statistics value = -5.06
4. Decision for the hypothesis test is that we will reject null hypothesis.
Step-by-step explanation:
We are given that an engineer is comparing voltages for two types of batteries (K and Q).
where,
= true mean voltage for type K batteries.
So, Null Hypothesis,
:
{mean voltage for these two types of
batteries is same}
Alternate Hypothesis,
:
{mean voltage for these two types of
batteries is different]
The test statistics we use here will be :
where,
= 9.29 and
= 9.65
Test statistics =
follows ![t_1_5_8](/tpl/images/0507/9906/d35f3.png)
= -5.06
At 0.05 or 5% level of significance t table gives a critical value between (-1.98,-1.96) to (1.98,1.96) at 158 degree of freedom. Since our test statistics is less than the critical table value of t as -5.06 < (-1.98,-1.96) so we have sufficient evidence to reject null hypothesis.
Therefore, we conclude that mean voltage for these two types of batteries is different.