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To evaluate the effect of a treatment , a sample of n=9 is obtained from a population with a mean of m=40 and the treatment is administered to the individuals is found to be M-33
A: If a sample has a standard deviation of s=9, are the data sufficient to conclude that the treatment has a significant effect using a two tailed test with a level of significants of 0.5?
B: If the sample standard deviation is s=15,are the data sufficient effect to conclude that the treatment has a significant effect using a two tailed effect with a level of significants of =0.5
C: Comparing your answers for parts a and b, how does the variability of the score in the sample influence the out come of the test hypothesis?
A running coach wanted to see whether runners ran faster after eating spaghetti the night before. A group of six runners was randomly chosen for this study.
A certain type of lightbulb has an average life of 500 hours with a standard deviation of 100 hours. The length of life of the bulb can be closely approximated by a normal curve.
Describe the types of probability -example of classical probability, empirical probability, or subjective probability.
a. How many of the individuals selected in your sample are female? b. How is the stratified sample different from the SRS?
Suppose you just received a shipment of eight televisions. Two of the televisions are defective. If two televisions are randomly selected, compute the probability that both televisions work. What is the probability at least one does not work?
A state meat inspector in lowa has been given the assignment of estimating the mean net weight of packages of ground chuck labeled " 3 pounds." Of course, he realizes that the weights cannot be precisely 3 pounds.
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
At the 5% significance level, if the sample proportion is .45, and the standard error of the sample proportion is .035, the appropriate conclusion would be:
What is a probability notation? What are the advantages and disadvantages of using a probability notation? How does probability notation aid in decision making?
Stores A, B, and C, have 50, 75, and 100 employees and respectively 50%, 60%, and 70% if these employees are women. Resignations are equally likely among all employees regardless of sex. One employee resigns and she is a woman. What is the probabi..
Create a set of n observations from the binomial distribution with 1 trial and the event probability of 0.007, where n is your answer.
Length of smoking time was recorded for each. Mean was =140 hours. Suppose = 8 hours. Determine 95% confidence interval for mean amount of time grocery-store ham is smoked.
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