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A woman with hemophilia has children with an unaffected man (i.e., without disease symptom).  What is the probability for her first two children to have hemophilia?  Assume her children could be male or female.  Note that hemophilia is an X-linked recessive disorder.

How many moles of oxygen are in 3.30 moles of NaClO4? A) 3.30 B) 0.303 C) 19.0 D) 13.2

What is the molarity of a solution prepared by dissolving 54.3 g of Ca(NO3)2  into 355mL of water? A) 0.331 M B) 0.932 M C) 0.117 M D) 1.99 M

What is the mass of 1.56 × 1021 atoms of magnesium in grams? A) 4.72 × 10-5 B) 0.0630 C) 0.142 D) 1.07 × 10-4

Noble gases, like helium and xenon, tend to form

Mr Stat was hired to do some research for the local potion master. He ran a Minitab analysis and found the regression equation for the age increase in years based on the quantity in milliliters, of Ageing Potion one consumed. Age Increase = 0.045*Quantity  a) What is the explanatory variable? [BLANK-1] b) What is the response variable? [BLANK-2] Suppose the quantities in the study ranged from 150ml to 740ml. If unable to predict, answer with n/a. c) How many years would someone’s age increase if they drank 200ml? [BLANK-3] d) How many years would someone’s age increase if they drank 100ml? [BLANK-4]

A consumer organization wants to estimate the life of their Extra-Brite light bulbs. With 42 randomly purchased bulbs, they find the mean life to be 998 hours with a standard deviation of 33 hours. Find the 95% confidence interval for the mean life of these bulbs. Interpret your answer.  Part A – Fill out the pieces of the formula: [BLANK-1]  ±[BLANK-2] times [BLANK-3]  divided by Square root of [BLANK-4] Part B – To two decimal places, the interval is ( [BLANK-5], [BLANK-6] ) Make sure this is small value first. Part C – We are [BLANK-7] confident the population [BLANK-8] is between [BLANK-9] and [BLANK-10] hours.

Mr Stat is hoping to determine if he can predict the score of a test based on the number of hours a student used to prepare. The test scores of 6 randomly picked students and number of hours they prepared are as follows: Hours 5 10 4 6 10 9 Score 74 91 69 86 95 87 a)  What is the explanatory variable? [BLANK-1] b) What is the response variable? [BLANK-2] c)  What is the regression equation? [BLANK-3] (Use y for the response variable and x for the explanatory variable.) d) What is the correlation coefficient, r?  [BLANK-4] (Round answer to 3 decimal places.) e)  What is the coefficient of determination, r2 ?[BLANK-5] (Write as a decimal rounded to 3 decimal places.)

During surgery, the suction canister rapidly fills with blood. The surgical technologist should anticipate which type of shock?

Which intervention helps prevent ventilator-associated pneumonia (VAP)?