Question

Step 1

**The normal distribution:**

A continuous random variable *X* is said to follow normal distribution if the probability density function of *X* is,

Step 2

**Standard normal distribution:**

The standard normal distribution is a special case of normal distribution. The standard normal distribution will have mean 0 and standard deviation 1. If a random variable *y *follows normal distribution with mean (m) and standard deviation (s), then the standard normal variable *z *will be as given below:

Step 3

**Calculation:**

From the given graph, it is seen that the shaded region is between the IQ scores 75 and 120.

Here, the IQ score, say *X*, is normally distributed with mean *μ* = 100 and standard deviation *σ* = 15. Thus, the p...

Tagged in

Q: what would be the mean and standard deviation of each chart!! I am having trouble calculating this. ...

A: Calculation: Mean:Before mean:Control: (5 + 1 + 2)/3 = 2.67. [(Before Stephanie + Before Brenda + Be...

Q: What determines whether a post hoc test is used in a one-way ANOVA calculation? Be specific.

A: ANOVA is generally used to analyze the significant differences among group means. Here we apply F-t...

Q: Let A and B be two events with P(A) = 0.71 and P(B) = 0.44. What is the smallest possible value of P...

A: According to the given question, A and B be two events with probability P(A)=0.71 and P(B)=0.44 the...

Q: What degrees of freedom would younormally expect a t test to have when N1 = 40 and N2 = 55?

A: It is provided that there are two samples of size n1=40 and n2=55.So, this is an example of 'two sam...

Q: Linear Programming Problem A manufacturer of three models of tote bag must determine the production ...

A: The provided data is,The available time for the respective production departments is,Cutting: 450 ho...

Q: A marketing manager for a cell phone company claims that more than 55% of children aged 8-12 have ce...

A: Null and alternative hypotheses:Here, to check whether more than 55% of children aged 8-12 have cell...

Q: (1) Let x be the age in years of a licensed automobile driver. Let y be the percentage of all fatal ...

A: Hello. Since you have posted multiple questions and not specified which question needs to be solved,...

Q: Suppose you would like to estimate, with 97% confidence, the proportion of computers that need repai...

A: It is given that the level of confidence is 97% and desired margin of error E is 0.035.The formula f...

Q: Consider a drug testing company that provides a test for marijuana usage. Among 301 tested subjects,...

A: Given hypothesis testp be the proportion of wrong test results Null hypothesis : p = 0.10Alternate H...

Sorry about that. What wasn’t helpful?