Cigarette Smoking A researcher found that a cigarette smoker smokes on average 30 cigarettes a day. She feels that this average is too low. She selected a random sample of 8 smokers and found that the mean number of cigarettes they smoked per day was 32 . The sample standard deviation was 2.8 . At \( \alpha=0.05 \), is there enough evidence to support her claim? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part: \( \mathbf{0} / \mathbf{5} \) Part \( \mathbf{1} \) of 5 (a) State the hypotheses and identify the claim.

Bila diberikan sebuah sebaran normal dengan \( \mu=40 \) dan \( \sigma=6 \), hitunglah: a. Luas daerah di bawah 32 b. Luas daerah di atas 27 c. Luas daerah di antara 42 dan 51 d. Nilai x yang luas daerah di bawahnya \( 45 \% \) e. Nilai \( x \) yang luas daerah di atasnya \( 13 \% \)

Question 2 ( 0.25 points) Retake question Choose the correct interpretation of a p-value. If the test is right-tailed, the \( p \)-value is the probability of observing a sample proportion as small as we saw in our sample, if the null hypothesis were true. If the test is right-tailed, the \( p \)-value is the probability of observing a sample proportion as large as we saw in our sample, if the null hypothesis were true. If the test is right-tailed, the \( p \)-value is the probability of observing a sample proportion as large as we saw in our sample. If the test is two-tailed, the \( p \)-value is the probability of observing a sample proportion as far away from the null value as what was observed in the current data set.

\( 11,16,12,7,23,9,5,5 \) What is the median of the data? B. 10 D. 11 D. 18

Here are the test scores of a class of learners: \( 100,100,99,98,92,91,91,90,88,87,87,85,85,85,80,79,76,72,67,66,45 \) a) What is the average score (mean) of the class for this test?

\( n = 5 \quad p ( \overline { x } > 500 ) \)