GRADE 11 STATISTICS AND PROBABILITY

It refers to a part of the sampling technique where each sample point has an equal chance of being selected.

• Systematic sampling

• Cluster sampling

• Lottery sampling

• Purposive Sampling

What does it mean when we failed to reject the null hypothesis?

• The conclusion is not significant.

• The null hypothesis is definitely correct.

• There is enough evidence to back up the null hypothesis.

• There is insufficient evidence to disagree with the null hypothesis.

When is a Type I error committed?

• We reject a null hypothesis that is false.

• We reject a null hypothesis that is true.

• We fail to reject a null hypothesis that is true.

• We fail to reject a null hypothesis that is false.

What test statistic will be used if the sample size is above 30?

• t-test

• population mean

• z-test

• standard deviation

When is a Type II error committed?

• We reject a null hypothesis that is true.

• We reject a null hypothesis that is false.

• We fail to reject a null hypothesis that is true.

• We fail to reject a null hypothesis that is false.

In the two-tailed test, the rejection region lies on ___________ of the normal distribution.

• center

• left tail

• right tail

• both tails

It refers to a value calculated from sample data which is needed in deciding whether the null hypothesis is rejected or not.

• test statistics

• null hypothesis

• critical region

• alternative hypothesis

If the computed z-value is 1.130 and the critical value is 1.96, what conclusion can be drawn?

• Fail to reject the null hypothesis.

• Reject both the null and alternative hypotheses.

• Reject the null hypothesis in favor of the alternative hypothesis.

• Fail to reject both the null hypothesis and alternative hypothesis.

Which of the following describes an alternative hypothesis using two-tailed test?

• 𝐻𝑎 = 100

• 𝐻𝑎 ≠ 100

• 𝐻𝑎 > 100

• 𝐻𝑎 < 100

The school nurse of a public school in Pampanga claims that the mean weight of grade 11 students is 55.6 kg with a standard deviation of 5.4 kg. The HOPE teacher takes a random sample of 35 STEM students and found out to have a mean weight of PHP 52.3 kg. To test the claim of the teacher with a level of significance of 0.05, what test statistic is appropriate to use assuming the data came from a normal distribution?

• one-sample t-test

• one-sample z-test

• Pearson r

• Linear Regression