[2] 11. Y is a value which is drawn from a normal distribution with mean 2.5...
0 1 pts Question 9 The distribution is normal, the mean is 60 and the standard deviation is 5. What percent of scores lie above 55? -0.8413 0.1587 15.87 84.13
Week 7 1) The population from which a sample is drawn is: a) Always Normal in shape b) Bigger in size than the sample size (N is greater than ) c) A large number of subjects or people d) None of the above 2) The probability of 2 heads when we flip a coin twice is: a) 1 b).5 C) 25 d).75 e) Unknown 3) How many possible values of the variable "# of heads when a coin is flipped...
The tread life of a particular tire is a random variable best described by a normal distribution with a mean of 60,000 miles and a standard deviation of 2000 miles. What is the probability that a randomly selected tire of this brand will last longer than 58,000 miles?A.0.7266, B.0.8413, C.0.1587, D.0.2266
(21) A sample of size 20 is drawn from a normal distribution with unknown variance and mean. The sample variance s2 = 0.012. Find a 95% two-sided confidence interval for the standard deviation o of the population. A. [0.0833,0.1600] B. (0.010,0.0130] C. (0.0069,0.0256] D. None of the above
Central Limit Theorem Data is drawn from a normal distribution with a mean of 50 and a standard deviation of is. A sample of 100 is taken and the sample meen computed of what is the mean of the sample mean of 100 of the b) what is sample the standard deviation mean of 100 what is the probability that the Sample mean is less than 48 CUMULATIVE I X NORM, DIST Case I
Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. 13) Shaded area is 0.9599. A) - 1.38 B) 1.03 1.82 D) 1.75 14) Shaded area is 0.0694. A) 1.45 B) 1.26 1.48 D) 1.39Find the indicated value. 15) z0.005 A) 2.535 D) 2.015 92.835 B) 2.575 16) z0.36 A) 1.76 B) 0.45 1.60 D) 0.36 Provide an appropriate response. 17) Find the area of the shaded region. The graph depicts IQ scores of adults, and those scores are normally distributed...
8. Which of the following is not a characteristic of the normal probability distribution? Select one: a. Symmetry b. The total area under the curve is always equal to 1. c. 99.72% of the time the random variable assumes a value within plus or minus 1 standard deviation of its mean d. The mean is equal to the median, which is also equal to the mode. 10. Given that z is a standard normal random variable, what is the probability...
(H) FALSE Which of the following statisties describes the spread of the normal distribution? (a) mean (b) minimum (e) maximum (d) standard deviation (e) none of the above
The amount of soda a dispensing machine pours into a 12-ounce can of soda follows a normal distribution with a mean of 12.45 ounces and a standard deviation of 0.30 ounce. Each can holds a maximum of 12.75 ounces of soda. Every can that has more than 12.75 ounces of soda poured into it causes a spill and the can must go through a special cleaning process before it can be sold. What is the probability that a randomly selected can will need to...
57 standard normal probability distribution function The staand σ 1) is graphed in the standard (x,y) dinate plane below. Which of the following cclosest to the percent of the data points within 2 standard deviations of the mean in (H percentages is that are any normal distribution? ceare 0.5 0.2 A. 50% B. 68% C. 90% D. 95% E. 99% 3 2 1 -0.2 standard normal probability distribution function The staand σ 1) is graphed in the standard (x,y) dinate...