1 pts Z follows a standard normal distribution. What outcome, z (z-value), has a lower tail probability of 0.35?
1 pts Z follows a standard normal distribution. What outcome, z (z-value), has a lower tail...
Z follows a standard normal distribution, What is the probability of getting P ( Z > 0.15 ) ? Enter your answer to 4 decimal places
1) Given a standard normal distribution, find the probability of having a z score higher than 1.67 ```{r} ``` 2) Given that test scores for a class are normally distributed with a mean of 80 and variance 36, find the probability that a test score is lower than a 45. ```{r} ``` 3) Given a standard normal distribution, find the Z score associated with a probability of .888 ```{r} ``` 4) Find the Z score associated with the 33rd quantile...
Suppose Z has a standard normal distribution with a mean of 0 and a standard deviation of 1. The probability of 0.3483 corresponds to Z value being larger than what value? 0.39 -1.81 0.00 -0.39
The random variable Z follows a normal distribution with a mean of 0 and a standard deviation of 1. 1. What is P(Z ≤ -1.54)? Include 4 decimal places in your answer. 2. What is P(Z ≥ 0.45)? Include 4 decimal places in your answer. 3. What is P(-1.25 ≤ Z ≤ 0.65)? Include 4 decimal places in your answer. 4. What is the 45th percentile of Z? That is, what is the value of Z where the cumulative probability...
The variable z has a standard normal distribution. What is the probability z will be in the range -1 to + 2 ? (Hint: use function pnorm) (Give your answer corrected to four decimal points as 0.xxxx)
The variable z has a standard normal distribution. What is the probability z will be in the range - 1 to + 2 ? (Hint: use function pnorm) (Give your answer corrected to four decimal points as 0.xxxx)
probability Q7 (4 marks) a) Creat a standard normal probability distribution plot for z-value for the range of (-3, 3) with increament of 0.5. b) Find the z value (to two decimal places) that cuts off an area in the upper tail section of the standard normal curve with probability of: 0.45 1) 0.0252) 0.053 ) 0.0054) 0.01 A) Answer Z-score probability -3 0.004431848 -2.5 0.0175283 -2 0.053990967 -1.5 0.129517596 -1 0.241970725 -0.5 0.352065327 0 0.39894228 0.5 0.352065327 1 0.241970725...
Please show the work !
Find the value of Z for the standard normal distribution such that the area a) in the left tail is 0.1000 b) between 0 and Z is 0.2291 and Z is positive c) in the right tail is 0.0500 d) between 0 and Z is 0.3571 and Z is negative 1) 2) Find the following binomial probabilities using the normal approximation a) n- 70, p-0.30, P(x-18) b) n-200, p 0.70, P(133 x S 145) c)...
What is the critical value of Z for a distribution with the proportion in the tail of .1151? Assume a one-tailed test. a.2.2 b.1.8 c..2 d.1.2 What is the critical value of Z for a distribution with the proportion in the body of .8389? Assume a one-tailed test. a.0.99 b .5 c.1.99 d.1 What is the critical value of Z for a distribution with the proportion in the tail of .3121? Assume a one-tailed test. a.49 b. .48 c 2.48...
1. (5 points) Suppose Z is a random variable that follows the standard normal distribution. a) Find P(Z > 0.45). b) Find P(0.7 SZ 1.6). c) Find 20.09. d) Find the Z-score for having area 0.18 to its left under the standard normal curve. e) Find the value of z such that P(-2SZS2) -0.5.