Karsyn Stafford
2022-09-20
Answered

What is the difference between discrete and continuous random variables ?

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anekesanxl

Answered 2022-09-21
Author has **12** answers

Discrete variables are variables whose values can only be whole numbers (integers), while continuous variables are variables whose values can be both integers and fractional (decimal) numbers.

asked 2021-03-18

A population of values has a normal distribution with

Find the probability that a single randomly selected value is between 133.6 and 134.1.

Write your answers as numbers accurate to 4 decimal places.

asked 2021-02-21

We wish to estimate what percent of adult residents in a certain county are parents. Out of 600 adult residents sampled, 192 had kids. Based on this, plot a $99\mathrm{\%}$ confidence interval for the proportion of adult residents who are parents in a given county.

Express your answer in the form of three inequalities. Provide your responses in decimal fractions up to three places $<p<$ Express the same answer using a point estimate and a margin of error. Provide your responses as decimals, to three places.

$p=\pm$

asked 2021-08-09

Refer to the Journal of Experimental Social Psychology (Vol. 45, 2009) study of whether buying gifts truly buys love. Recall that study participants were randomly assigned to play the role of gift giver or gift receiver. Gift receivers were asked to provide the level of appreciation (measured on a 7-point scale where 1 = "not at all" and 7 = "to a great extent") they had for the last birthday gift they received from a loved one. Gift givers were asked to recall the last birthday gift they gave to a loved one and to provide the level of appreciation the loved one had for the gift. The researchers wanted to know if the average level of appreciation is higher for birthday gift givers than for birthday gift receivers. a. Why is this study designed? b. Specify the key elements of the study: experimental unit, response variable, factor, and treatments.

asked 2021-05-12

Let ${X}_{1},{X}_{2},...,{X}_{6}$ be an i.i.d. random sample where each ${X}_{i}$ is a continuous random variable with probability density function

$f(x)={e}^{-(x-0)},x>0$

Find the probability density function for${X}_{6}$ .

Find the probability density function for

asked 2022-01-16

Is age continuous or discrete data?

asked 2022-09-22

Suppose that the random variables $${Y}_{1}$$ and $${Y}_{2}$$ have means $${\mu}_{1}$$ and $${\mu}_{2}$$ and variances $${\sigma}_{1}^{2}$$ and $${\sigma}_{2}^{2}$$, respectively. Use the basic definition of the covariance of two random variables to establish that $$Cov({Y}_{1},{Y}_{2})=Cov({Y}_{2},{Y}_{1})$$.

asked 2022-01-19

What are the mean and standard deviation of a binomial probability distribution with n=114 and $p=\frac{3}{49}$ ?