here are some statistical questions below, and also I don't understand why I got wrong answer for the first and second questions?

A measurement that has high precision has low O bias total variability O variance O accuracyA measurement of etch depth has standard deviation of 2 um. The specifications are 250 to 300 um. What is the P/T ratio of the measurement when k = 6? O 0.04 O 0.08 0.10 O 0.12 O 0.24A manager of a hotel chain was interested in investigating if there is a relationship between monthly labor hours and the number of beds occupied in the hotel. The officer randomly selected 17 of the hotels in the chain across the country and recorded, for each of these hotels, the monthly labor hours required during the month of July and the number of bed days occupied for that month. (A hotel has occupied one "bed day" if one bed is "occupied" for an entire day.) The officer is interested in seeing if the labor hours required can be predicted from the number of bed days occupied on a monthly basis. The sample data were analyzed in Excel. Included below is part of the regression analysis output. SUMMARY OUTPUT Regression Statistics Multiple R 0.9859928 34 R Square 0.972181869 Adjusted R Square 0.970327327 Standard Error 957 .8414089 Observations 17 ANOVA SS MS Significance E Regression 1 480947 920 480947920 524.2168783 4.41082E-13 Residual 15 13761902.47 917460. 1648 Total 18 494709822 4 Coefficients Standand Ermr 1 Stat R.value Inter dept -28.105881 319.0383754 -0.088096164 0.930985829 Bed Days 1 117 389432 0.048 803295 22 89577861 4.41082E- 13What are the units of b? 0 Hours per bed 0 Beds 0 Hospitals Beds per hour According to this regression analysis, what percentage of the variation in the number of monthly labor hours required for a hotel can be explained by the number of bed days in a month? Q 28.1% C) 97.0% O 97.2% 0 93.1% According to this regression analysis, if the number of bed days increases by 200, what is the predicted increase in the number of labor hours required for a given month? 0 957.8 Q 111.7 C) 56.2 C) 223.5 According to this regression analysis, what is the predicted number of monthly labor hours required for a hotel with 3000 bed days for the month? Q 4441.5 Q 3324.1 Q 4106.2 Q 3882.8