37. If z is a standard normal random variable, the area between 0.0 and: 1.20 is

Question

37. If z is a standard normal random variable, the area between 0.0 and: 1.20 is 0.3849, while e area between o 0.0 and A). 0.0808 B). 0.1151 C). 0.0343 D). 0.8041 E). 0.1646 1.40 is 041 92. what is the probabilities between z=-1.20 and Z 38. A standard normal distribution is a normal distribution with: A). a mean of zero and a standard deviation of one B). a mean of one and a standard deviation of zero C), a mean zero and a standard deviation of zero D). a mean of one and a standard deviation of one E). none of these 39. If the standard normal deviate of arandom variable value of x# 2 sz-2, whilethe standard deviation of the random variable r equals 2, then the mean of x is: D) 2 E)0 40. If a store manager has recently stated that she estimates the mean amount spent per customer per visit to be between $33.75 and $72.23, the numbers $38.75 and $72.23 are considered point estimates for the true population mean. Case a. True 41. Ifrandom samples ofsize n 36 are drawn from a nomom al populmon with finite mean -75 and standard deviation 15, then the sampling distribution of the sample mean z is approximately normally distributed with mean-75 and standard error is A) 1.5 B) 15 C) 0.4 D) 2.5 42. Cansider a large popilation with a mean of 150 and a standard deviation of 27. The standard error of the sampling distribution of sample mean is equal to 4.5. What is the random sample of size ? A)25 B)36 C) 6 D) 15 E) 26 43. Random samples of size 36 each.are taken from a large population whose mean is 120 and standard deviation is 39. The mean and standard eror of the sampling distribution of sampie mean, respectively. ure: A). 120 and 39 B). 120 and 5.5 120and 65 D). 39 and 120 E. 6.3 and 120

Explanation / Answer

We are allowed to do only 1 question at a time. Please post again for other questions.

37) z1 = - 1.2

z2 = 1.4

We have to add area between 0 and 1.4 with area between 0 and 1.2

So,

P = 0.4192 + 0.3849

P = 0.8041

D option

Related Questions

Navigate

• Browse (All)
• Browse 3
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.