What does it mean for a sample to have a standard deviation of zero? Describe the scores in such a sample?

boitshupoO
2020-11-30
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asked 2021-11-27

Find the range and standard deviation of the set of data

210,215,220,225,230,235,240

The range is 30.

The standard deviation is ?

210,215,220,225,230,235,240

The range is 30.

The standard deviation is ?

asked 2021-12-06

Zara runs a home business based on art and craft items. She sells her products either through taking orders online from her website or art exhibitions. Based on her previous data, 40% of the orders are received from art exhibitions. Suppose 18 orders were booked independently, what is the probability that

a) Between eight and ten orders were booked through website?

b) What is the probability that the 3-rd order placed is the first order booked from website?

c) What is the probability that the 8-th order placed is the fourth order booked from website?

a) Between eight and ten orders were booked through website?

b) What is the probability that the 3-rd order placed is the first order booked from website?

c) What is the probability that the 8-th order placed is the fourth order booked from website?

asked 2021-11-26

A sensor connected to a control center indicates that there is damage somewhere along a particular 4-mile length of train track.

The conductor thi

that the exact location of the damage is uniformly distributed between mile 0 and mile 4 of that length of track. Let X be the distance along the track from mile 0 to the location of the damage.

a) Let f(x) be the probability density function of X. What is the value of f(1)?

b) What is the expected value of X?

c) What is the probability that the damage is located between mile 0 and mile 10 of that length of track?

The conductor thi

that the exact location of the damage is uniformly distributed between mile 0 and mile 4 of that length of track. Let X be the distance along the track from mile 0 to the location of the damage.

a) Let f(x) be the probability density function of X. What is the value of f(1)?

b) What is the expected value of X?

c) What is the probability that the damage is located between mile 0 and mile 10 of that length of track?

asked 2021-12-01

Consider the following data set.

The annual wages of employees at a small accounting firm are given in thousands of dollars.

25 25 30 30 35 35 50 60 16 14 18 18 20

Prepare a frequency distribution for the data set.

$$\begin{array}{|cc|}\hline Wages& Frequency\\ 14\\ 16\\ 18\\ 20\\ 25\\ 30\\ 35\\ 50\\ 60\\ \hline\end{array}$$

The annual wages of employees at a small accounting firm are given in thousands of dollars.

25 25 30 30 35 35 50 60 16 14 18 18 20

Prepare a frequency distribution for the data set.

asked 2021-10-20

What is the difference between a normal profile of a random variable and normal pdf of a random variable. What is the median value of a random variable having a normal pdf?

asked 2021-11-28

A die is loaded in a such a way that probabilities of getting 1, 2, 3, 4, 5, 6 are 1/2, 1/6, 1/12, 1/12, 1/12 and 1/12.

a. Construct the probability distribution for the data.

b. Find the mean and the variance of the probability distribution.

a. Construct the probability distribution for the data.

b. Find the mean and the variance of the probability distribution.

asked 2021-11-26

For the following Grouped Frequency Data Table (GFDT) answer the questions below.

$$\begin{array}{|ccc|}\hline \text{Lower Class limit}& \text{Upper Class Limit}& \text{Frequency}\\ 30& 34& 10\\ 35& 39& 9\\ 40& 44& 4\\ 45& 49& 10\\ 50& 54& 7\\ 55& 59& 8\\ 60& 64& 8\\ 65& 69& 6\\ 70& 74& 14\\ \hline\end{array}$$

(a) What is the 88-th percentile for the following Grouped Frequency Data Table?

(b) What is the 9-th decile for the following Grouped Frequency Data Table?

(c) What is the median for the following Grouped Frequency Data Table?

(a) What is the 88-th percentile for the following Grouped Frequency Data Table?

(b) What is the 9-th decile for the following Grouped Frequency Data Table?

(c) What is the median for the following Grouped Frequency Data Table?