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Question
1a) Choose the best answer. Justify the answer. (a) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is: (i) interval (ii) nominal (iii) ordinal (iv) ratio
(b) Explain the answer. In a career readiness research, 100 students were randomly selected from the psychology program, 150 students were randomly selected from the communications program, and 120 students were randomly selected from cyber security program. This type of sampling is called: (i) cluster (ii) convenience (iii) systematic (iv) stratified
2 True or False. Justify answers. (a) If the variance from a data set is zero, then all the observations in this data set must be identical.
(b) The median of a normal distribution curve is always zero.
Compute the z score that allows computing the probability associated with the sample mean score being less that 67.
What is the importance of pretesting questions and instruments? What are risks of not doing this? Provide an example
Using numerical and graphical summaries, describe the relationship between each pair of variables
With a sample of n=6 children, the researcher obtains a sample mean of X=18.3 kg. Show values for Z critical and Z calculated. Calculate all values for Z to two decimal places (x.xx)
A quadratic revenue function often occurs in practice. The reason is that as more units are produced, the price must be lowered in order to sell them all.
Hurricane hitting the eastern coast of India· follows Poisson with a mean of 0.5 per year. Determine the probability of more than three hurricanes hitting.
Python eggs How is the hatching of water python eggs influenced by the temperature of the snake's nest? Researchers randomly assigned newly laid eggs.
a) Assume that the president is correct and p = 0.27. What is the sampling distribution of for this study? b) What is the probability that the sample proportion will be between .14 and .40 (to 4 decimals)? c) What is the probability that the sample p..
One characteristic of billiard balls is their elasticity - the bounce they get when striking one another. A manufacturer of billiard balls is testing three additives to the basic plastic.
An article in Worth discusses the immense success of one of the world's most prestigious cars, the Aston Martin Vanquish.
Find the critical value X 2/0 and rejection region for the type of chi-square test with sample size n and level of significance α.
The length of human pregnancies from conception to birth varies according to a distribution that is approximately Normal with mean 266 days
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