please solve

1. The announcer on the radio tells listeners that the probability of snow tonight is 20%. We should interpret this to mean that CA 20% of the listeners will have snow in their area tonight. B. you will not have any snow tonight because the chance of snow is less than 509%. According to historical records when meteorological conditions were the same as today, it snowed twenty percent of the time. " Dit will snow if you are unlucky for lucky if you like snow) and not snow if you are lucky. 2.A group of college students believed that herbal tea has remarkable restorative powers. To test their theory. they randomly selected residents at a local nursing home. Each week they visited these residents and served them herbal tea. After several months, many of these residents were more cheerful and healthy. Which of the following can be correctly concluded from this study? A.Herbal tea will improve the emotional state of residents in nursing homes, B. While there is some evidence that drinking herbal tea improves one's emotional state, the results are not convincing since a scientist did not conduct the study. C. The results are not convincing because only residents of one nursing home were studied and only for a few months. " D. The results are not convincing because the effect of herbal tea is confounded with the effect of visiting. 3.Scores on a standard IQ test are approximately normally distributed with a mean of 100 and a standard deviation 15. If Joe's score is 133, how many standard deviations is Joe's score above the mean? A 33, B 15, C. 6.6, D. 2.2. E1.5 4.Referring to question 33, what percentage of IQs are more than 2.5 standard deviations above the mean? A 10%, B 5%, C.2.5%, D. 0.6% Elimpossible to determine. 5. To standardize means to "Alsubtract the mean from a given value and then divide by the standard deviation. B.calibrate the data until they have a normal shape. "(C] smooth out irregularities and remove outliers from the data set "D. center the data set about zero