Answer:
Use the equation
Step-by-step explanation:
y = mx + b
Answer:
Step-by-step explanation:
Hypothesis test about a population mean is done to evaluate two exclusive statements about a population in order to determine which is best supported by the sample data.
From the situations given, the correct options are
b. A recent study estimated that 20% of all college students in the United States smoke. The head of Health Services at Goodheart University suspects that the proportion of smokers may be lower there. This would require taking a sample and determining the probability of success.
c. A certain prescription allergy medicine is suppose to contain an average of 245 parts per million (ppm) of active ingredient. The manufacturer wants to check whether the mean concentration in a large shipment of pills is 245 ppm or not.
d. A report on the College Board website stated that in 2003 males scored generally higher than females on the SAT exam. An educational researcher wants to check whether this is true in her school district.
Answer:
is the fraction of 8th graders who are boys.
Step-by-step explanation:
Let total number of 8th graders = 
Given that, 
of 8th graders play sports
8th graders who play sports = 
Also, Given that, 
of 8th graders that play sports are boys
Number of 8th graders that play sports, and are boys = 
Hence, the answer is:
is the fraction of 8th graders who are boys.
Answer:
1.5 bags
Step-by-step explanation:
Width = 1 yard = 3 feet
Length = 5 feet
Square feet(area) of the floor = 5ft × 3ft = 15sqft
1 bag = 10sqft
x bag = 15sqft
x bags = (15 × 1)/10 = 1.5 bags
