The condition is which a person is unable to distinguish among certain shades of colors, or even colors at all.Group of answer choicesColor Depletion DeficiencyColor Vision Deficiency or Color BlindnessVisual Acuity LossAll of the above

Color blindness is caused by a deficiency or absence of certain types of cones in the retina. True False

What type of visual impairment makes it difficult for people to distinguish red and green pigments due to an inability to see green wavelengths

A person with a deficiency in only one of the color systems, such as red–green, would be considered a ___________, while someone who is color-blind in two color systems is a labeled a _____________.Group of answer choicesA. monochromat; dichromatB. dichromat; monochromatC. monochromat; trichromatD. dichromat; trichromat

Colorblindness is any abnormality of the color vision system that causes a person to see colors differently than most people, or to have difficulty distinguishing among certain colors (www.visionrx.com).Colorblindness is gender-based, with the majority of sufferers being males.Roughly 8% of white males have some form of colorblindness, while the incidence among white females is only 1%. A random sample of 20 white males and 40 white females was chosen.Let X be the number of males (out of the 20) who are colorblind.Let Y be the number of females (out of the 40) who are colorblind.Let Z be the total number of colorblind individuals in the sample (males and females together).Which of the following is true regarding the random variables X and Y? Both X and Y can be well approximated by normal random variables. Only X can be well approximated by a normal random variable. Only Y can be well approximated by a normal random variable. Neither X nor Y can be well approximated by a normal random variable.Question 2Type numbers in the boxes.10 pointsSuppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ = 141 seconds and a standard deviation σ = 7 seconds. Suppose that to qualify for the Nationals, a woman must complete the 200-meter backstroke in less than 128 seconds. What proportion of competitive female swimmers will qualify for the Nationals? Give your answer to four (4) decimal places.Click here to download the normal table.Question 3Select one answer.10 pointsSuppose the time to complete a 200-meter backstroke swim for female competitive swimmers is normally distributed with a mean μ = 141 seconds and a standard deviation σ = 7 seconds.What is the completion time for the 200-meter backstroke for a female with a z-score of −1.64? (Round answer to 1 decimal place.) 141.0 129.5 130.8 152.5Question 4Type numbers in the boxes.10 pointsSuppose the scores on an exam are normally distributed with a mean μ = 75 points, and standard deviation σ = 8 points.Suppose that the top 4% of the exams will be given an A+. In order to be given an A+, an exam must earn at least what score? Report your answer in whole numbers.Question 5Select one answer.10 pointsThe following histogram displays the distribution of battery life (in hours) for a certain battery model used in cell phones:Suppose that battery life is a normal random variable with μ = 8 and σ = 1.2. How likely is it that a randomly chosen battery lasts longer than 10.4 hours? 0.50 0.16 0.05 0.025Question 6Select one answer.10 pointsThe number of days (X) after mailout it takes a utility company to receive payment for a customer’s bill is a normal random variable with a mean of 31 days and a standard deviation of 6 days.The latest 2.5% of bills will be received more than how many days after mailout? 13 19 25 31 37 43 49Question 7Type numbers in the boxes.10 pointsAccording to the Bureau of Labor Statistics, in May 2014 the mean hourly wage of a social worker was $28.08 with a standard deviation of $1.97. Jeronica is a social worker with an hourly wage of $31.60. What is Jeronica’s z-score? (Round your answer to 2 decimal places.)Question 8Select one answer.10 pointsThe time it takes a surgeon to complete a laproscopic surgery to remove the gall bladder is normally distributed with a mean of 132.4 minutes and a standard deviation of 15.7 minutes. A patient’s risk of complications is increased the longer he is in surgery. An unusually risky surgery is one that is in the top 4% of all surgery lengths.What is the minimum surgery length (in minutes) that would be considered unusually risky? Note: Answers are rounded to 1 decimal place. 247.4 minutes 104.9 minutes 147.5 minutes 159.9 minutes

Someone who suffers from hyperopia:Group of answer choicesA. has good distance vision but has difficulty seeing things up close.B. can see things well up close but has poor distance vision.C.has color blindness that affects only one of the color systems.D. has only black-and-white vision.