Consider the following notation • i: units • t: time (in years) • To: the number of pre-intervention periods • At an indicator of living in a state that had implemented same-sex marriage policies • Xť: conditioning covariates, e.g., state, age, sex, race/ethnicity, and year • Yit: unit i's self-report of 1 or more suicide attempts within the past 12 months measured at year t ● • Y: unit i's potential outcome under the intervention at time t Y: unit i's potential outcome under the control at time t ppose that the consistency assumption holds. Which potential outcome can never be observed (choose that apply)? a. Yo with Ai = 0 and t ≤ To it b. Y with Ai= 0 and t > To c. Yo with Ai= 1 and t ≤ To it d. Y with At = 1 and t > To e. Yo with A; = 1 and t > To

What raw score for age corresponds to a z- score of +4.50, given a mean of 12.0 years and a standard deviation of 4.0 years?

The best depiction of a population characteristic is a(an): Dependent variable Statistic Independent variable Parameter

Suppose the mean retail price oer gallon of regular gasoline int the United States is $3.42 with a standard eviation of $0.40 and the retail price per gallon has a normal bell shaped distribution. Use the Empirical Rule to answer the following quesitona. What percentage of regular gasoline sold between $2.62 and $3.82 per gallon? what percentage of regualr gasoline sold for more the $3.82 per gallon?

One important consideration in determining which location is best for a new retail business is the amount of traffic that passes the location each business day. Counters are placed at each of four locations on the five weekdays, and the number of cars passing each location is recorded in the table below. At 0.05 level of significance, is there sufficient evidence of a significant difference in the mean number of cars per day at the four locations?Using MS Excel,what is the computed value of the F statistic ? * Location II II IV 45 48 44 39 50 60 50 49 39 40 38 39 44 45 42 40 42 43 44 43 0.76 2.23 1.19 0.84

The serum cholesterol levels (in 244, 235, 249, 237, 228, 220, 201, 259, 191, 198, 240, 196, 222, 252, 203, 211, 215, 254 Send data to calculator (a) mg th Find 30 and 75th percentiles for these cholesterol levels. (b) dL (If necessary, consult a list of formulas.) The 30th percentile: -) of 18 individuals are The 75th percentile: mg dL mg dL

The average house has 13 paintings on its walls.  Is the mean different for houses owned by teachers? The data show the results of a survey of 12 teachers who were asked how many paintings they have in their houses. Assume that the distribution of the population is normal. 12, 14, 14, 14, 15, 14, 14, 14, 12, 13, 15, 14 What can be concluded at the  αα = 0.01 level of significance? For this study, we should use     The null and alternative hypotheses would be:       H0:H0:                   H1:H1:               The test statistic     =  (please show your answer to 3 decimal places.) The p-value =  (Please show your answer to 4 decimal places.) The p-value is     αα Based on this, we should      the null hypothesis. Thus, the final conclusion is that ... The data suggest the population mean is not significantly different from 13 at αα = 0.01, so there is sufficient evidence to conclude that the population mean number of paintings that are in teachers' houses is equal to 13. The data…

An analysis is conducted to compare mean time to pain relief (measured in minutes) under four competing treatment regimens. Summary statistics on the four treatments are shown below.    Complete the following ANOVA Table.           Source of Variation SS df MS F Between Groups         Within Groups 3719.48                 Total