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1. An experiment was conducted to examine the yield of six different types of alfalfa. They were planted in four different locations, so we will consider the field as a second factor because different soil and moisture types can also have an effect on yield. The interaction plot below was obtained.
This plot indicatesA. an effect for alfalfa type only.B. an effect for field only.C. interactions are present.
2. Ninety-one students participated in a study in which some were randomly assigned to run a quarter mile and others were not. Their pulse rates were measured before running, and immediately after the run, even for those who didn't run. We are further interested in whether any pulse rate increase is similar for both females and males. The response variable is the difference in the pulse rates. In the graph below females are coded as 0 and males as 1. Runners were coded as 1.
This graph showsA. running increases the pulse rate.B. running increases the pulse rate, and the amount of increase is higher for females.C. there was no running effect.
Sum of shaded area is equal to one. Smoothed histogram or density curve. How we view the "distribution" of a dataset can depend on how much data we have and how it is binned.
Tourism is one consideration for CoffeeTime's future, A survey of 1,233 visitors to mumbai last year revealed that 110 visited a small cafe during their visit.
Scores on test form normal distribution with mean of µ = 150 and a standard deviation of σ = 25. Mean for sample is M = 158. Compute test statistics (z score) for sample.
Suppose that you wish to test the effect of lowering the soil ph on the number of lady ferns in an area. The researchers hypothesize that lowering the ph-level of the soil will lead to more ferns.
Determine the minimum required sample size if you want to be 99% confident that the sample mean is within 2 units of the population mean given sigma = 7.8. Assume the population is normally distributed.
2 to every even-numbered card, with aces being 1s. Determine the frequencies of 0, 1, and 2. Use SPSS to get the value of test statistic and p-value.
The population standard deviation was 1.68 years. Using the 99% degree of confidence, what is the confidence interval for the population mean.
Your office has just received 128 in insurance claims to be processed in the next few days. What is the probability that half or more of the claims have been padded?
1.a researcher is interested in comparing sat scores for students enrolled in public schools private schools and those
Based on the numbers presented, what do you think of the discrimination claim?
In rectangular coordinate system, determine the distance between the points (-4,1) and (8,6).
According to the local union president, the mean gross income of plumbers in the Salt Lake City area follows the normal probability distribution with a mean $45,000 and a standard deviation of $3,000.
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