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1. A student is measuring assertiveness with an interval scale. Is it correct to say that a score of 30 on the scale represents half as much assertiveness as a score of 60? Explain.
2. For each of the following sets of scores, find
ΣNi=1 Xi;
a. 2, 4, 5, 7
b. 2.1, 3.2, 3.6, 5.0, 7.2
c. 11, 14, 18, 22, 25, 28, 30
d. 110, 112, 115, 120, 133
According to the retail electronics chain, adults in 40 to 50 year old age group, the mean amount spent per year on electronics is $1998.
It is important for airlines to know the approximate total weight of the baggage carried on each airplane. An airline researcher believes that the mean baggage for each adult is 60 kg. To test his belief, he draws a random sample of 50 adult passenge..
The Medical Officer of Health in charge of day clinics in the Butterworth district is planning for the expansion of the medical facilities at these clinics based on the growth in demand for the clinics' services.
Using this data set, compute the: mode, median, mean, range, interquartile range, variance, standard deviation and coefficient of variation
In a group of six professors selected at random, what is the expected number of extroverts? What is the standard deviation of the distribution?
A teller can process an average of 100 customers per hour, which also can be modeled by a Poisson distribution. If there is one teller on duty, determine:
a. Set up the null and alternative hypotheses. b. Formulate the Decision Rule. Use 0.01 level of significance. c. What's your decision regarding the null hypothesis? Why? What can we conclude?
Explain why the ordinary least squares solution is not unique. What can you say about the residuals of any of the solutions. Using the SVD of X, write a closed form expression for this limiting solution.
The most probable value to roll on two dice is 7. The most probable number of heads in two coin flips is one head. Can you think of most probable values of random events?
suppose we have a floor made of parallel strips of wood each with width 3 and we drop a needle of length 1 onto the
If a study had a result of F (2, 147)= 4.56, p = 0.003, how many groups were in the study, and what was the sample size?
What is the probability that a consumer selected at random: a. purchased fewer products than before? b. purchased the same number of products as before?
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