The table below refers to a survey of senior high school students in Dayton, Ohio. Cigarette use Yes Alcohol use No Total Yes 1449 500 1949 No 46 281 327 Total 1495 781 2276 10. Test whether cigarette use and alcohol use are statistically independent using the chi- squared test. Ho: На: x2 = df = If the P-value is less than 0.001 and a = 0.05, is there evidence of an association between alcohol use and cigarette use?

A researcher is trying to determine if there is a significant relationship between number of hours spent cycling each week and resting heart rate among study participants.  Which procedure should he use? Group of answer choices: Mean ANOVA One-way chi square Correlation

Iq and lead exposure. A sample of subjects with low lead levels in their blood was taken and another random sample was taken with high levels of lead in their blood. Use a 0.05 significant level to test claim that iq score of people p le w low lead levels is higher than the mean iq score of people w higher lead levels. Use p value approach      LLL N =78 SAMPLE MEAN=92.88 S=15.34 HLL N=21 SM= 86.90 S=8.99

Students in an experimental psychology class did research on depression as a sign of stress. A test was administered to a sample of 30 students. The scores are given. Complete parts (a) through (c) below. 32 54 11 15 35 21 OA. 158 34 15 55 51 11 35 2 1457 3 1234567 4123445566 511245666 34 33 46 OB. 11155 (a) Find the mean and median of the data. The mean is . (Round to three decimal places as needed.) 44 26 27 The median is .(Type an integer or a decimal.) (b) Draw a stem-and-leaf plot for the data using one row per stem. Which stem-and-leaf plot below shows the data? 2 112677 3 233445556 4 244666 5 1456 ... 21 42 38 OA. The distribution is symmetric. B. The distribution is skewed right (positively skewed). OC. The distribution is skewed left (negatively skewed). O D. The distribution is uniform. (c) Describe the shape of the distribution. Which description below best describes the shape of the distribution? 56 46 OC. 1112455668 2 14556 3 15 4 13457 5 223446667 46 27 33 35 22 44 36 0…