23. If a normal random variable has a mean = _____ and a standard deviation = __

Question

23. If a normal random variable has a mean = _____ and a standard deviation = _____, it is called a standard normal distribution.

a. 1;0

b. 1;1

c. 0;0

d. 0;1

24. The _____ distribution models the time between randomly occurring events.

a. normal

b. Poisson

c. exponential

d. binomial

25. The component of statistical methodology that includes the collection, organization, and summarization of data is called:

a. descriptive statistics.

b. probability distribution.

c. statistical inference.

d. predictive statistics.

26. _____ is the process of drawing conclusions about unknown characteristics of a population from which data are taken.

a. Descriptive statistics

b. Regression analysis

c. Statistical inference

d. Correlation analysis

Explanation / Answer

Answer:

23.d.0,1

Explanation:

Standard normal distribution is centered around zero it is a continuous probability distribution with mean and standard deviation need not be same.Standard normal distribution have mean 0 and standard deviation 1

24.c.Exponential

Explanation:

Exponential model descibes the time between random events that occur independently at a constant average rate

25.a.Descriptive statistics

Explanation:

Descriptive statistics explains about the basic features of data and how it is summarized and organized based on the samples and their meaasures

26.c.Statistical interference

Explanation:

Statistical interference is used to make judgements about the parameters of population and uses data analysis to deduce the properties of underlying probability distribution

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