Math 302 week 3 quiz - Study guides, Class notes & Summaries

If random variable X has a binomial distribution with n =10 and P(success) =p =0.2, find the probability that X is less than 6. (That is, find P(X<6) Answer: (round to 4 decimal places) Answer Key:0.9936|.9936 P(x < 6) = P(x is less than or equal to 5), in Excel =BINOM.DIST(5,10,0.2,TRUE) Approximately 8% of all people have blue eyes. Out of a random sample of 20 people, what is the probability that at most 2 of them have blue eyes? Round answer to 4 decimal places. Answer Key:0.787...

MATH 302 Quiz 4 Week 4 Knowledge Check – Question and Answers Part 1 of 6 – Calculations of Probabilities 1.A dishwasher has a mean life of 11.5 years with an estimated standard deviation of 1.5 years (“Appliance life 0.0/ 1.0 Points expectancy,” 2013). Assume the life of a dishwasher is normally distributed. Find the number of years that the bottom 10% of dishwasher would last. Round answer to 2 decimal places. 2. Find the area under the standard normal distribution to the left o...

MATH 302 Quiz 4 Week 4 Knowledge Check – Practice Test PART 1 OF 6 – CALCULATIONS OF PROBABILITIES 1. Find P(Z > -1.24). Round answer to 4 decimal places. Answer: ? 2. Find the area under the standard normal distribution to the left of z = -1.05. Round answer to 4 decimal places. 3. Find P(1.31 < Z < 2.15). Round answer to 4 decimal places. Answer: ? PART 2 OF 6 – CONTINUOUS RANDOM VARIABLES AND PROBABILITY FUNCTIONS 4. Find the probability that falls in the shaded area....

MATH 302 Quiz 4 Week 4 Knowledge Check – Question and Answers Part 1 of 6 – Calculations of Probabilities 1.A dishwasher has a mean life of 11.5 years with an estimated standard deviation of 1.5 years (“Appliance life 0.0/ 1.0 Points expectancy,” 2013). Assume the life of a dishwasher is normally distributed. Find the number of years that the bottom 10% of dishwasher would last. Round answer to 2 decimal places. 2. Find the area under the standard normal distribution to the left o...

MATH 302 WEEK 5 QUIZ – QUESTION AND ANSWERS Question 1 1 / 1 point A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD) in their county. They are using 97% confidence level and the CDC national estimate that 1 in 68 ≈ 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 1.5%? Round up to the nearest integer, do not include decimals. Answer ___30...

MATH 302 WEEK 3 KNOWLEDGE TEST Part 1 of 6 - Binomial Distribution 1.0/ 5.0 Points Question 1 of 20 1.0/ 1.0 Points An unprepared student takes a 10 question TRUE/FALSE quiz and ended up guessing on all the problems. Find σ. Round answer to 4 decimal places. Answer: 1.5811 Answer Key:1.5811 Feedback: in Excel, =SQRT(10*0.5*0.5) Question 2 of 20 0.0/ 1.0 Points It is known that 50% of adult workers have a high school diploma. If a random sample of 8 adult workers is selected, what i...

MATH 302 Week 5 Quiz with Answers Part 1 of 4 – Z-interval for Unknown Questions A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD) in their county. They are using 97% confidence level and the CDC national estimate that 1 in 68 ? 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 1.5%? Round up to the nearest integer, do not include decimals. ...

MATH 302 Week 5 Quiz - Question and Answers Question 1 1 / 1 point A researcher would like to estimate the proportion of all children that have been diagnosed with Autism Spectrum Disorder (ASD) in their county. They are using 97% confidence level and the CDC national estimate that 1 in 68 ≈ 0.0147 children are diagnosed with ASD. What sample size should the researcher use to get a margin of error to be within 1.5%? Round up to the nearest integer, do not include decimals. Answer Que...

MATH 302 QUIZ 3 – QUESTION AND ANSWERS Question 1 of 20 1.0/ 1.0 Points Click to see additional instructions The manufacturer of a new compact car claims the miles per gallon (mpg) for the gasoline consumption is mound-shaped and symmetric with a mean of 25.9 mpg and a standard deviation of 9.5 mpg. If 30 such cars are tested, what is the probability the average mpg achieved by these 30 cars will be greater than 28? Answer: 0.1129 Round your answer to 4 decimal places as necessary. Fo...