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1. Use the following data to answer Questions 1a and 1b.
Total no. of problems correct (out of a possible 20) Attitude toward test taking (out of a possible 100)
17 94
13 73
12 59
15 80
16 93
14 85
16 66
16 79
18 77
19 91
a. Compute the Pearson product-moment correlation coefficient in SPSS and paste your output in this worksheet.
b. Construct a scatterplot for these 10 values. Based on the scatterplot, would you predict the correlation to be direct or indirect? Why?
in 2008 a university in the midwestern united states surveyed its full-time first-year students after they completed
birthweights at a local hospital have a normal distribution with a mean of 110 oz. and a standard deviation of 15 oz.
Two methods for training accountants are to be compared. Students are randomly assigned to one of the two methods.- Using Welch's test, would you conclude that the methods differ in terms of the average return? Use α = .05.
Use the steps of hypothesis testing, (b) figure the effect size for the study; and (c) explain your answers to parts (a) and (b) to someone who has never had a course in statistics.
1. investigating a particular stock you estimate the following returns and their associated probabilitiesprobability
Compute the projected profit for the order quantities suggestedby the management team under three scenarios: worst case in whichsales = 10,000 units, most likely case in which sales = 20,000units.
The "x" values for red and brown are the counts of each we found on the Data page. You will need to calculate the weighted p?
1. Suppose a food scientist wanted to compare the "tastiness" of different variations of a cookie recipe. (a) Suggest several ways to quantify (measure) "tastiness", and discuss the advantages and disadvantages of each.
One state lottery has 1000 prizes of $1, 200 prizes of $5, 50 prizes of $25, 15 prizes of $150, 4 prizes of $500, and 1 prize of $2500. What is the lottery expected profit per ticket?
Which has mean of 88 and standard deviations 16. Find the probability that the difference between the sample mean. a)is more than 8. b)is less than by 18.
A matched pairs experiment compares the taste of instant versus fresh-brewed coffee. Each subject tastes two unmarked cups of coffee, one of each type, in random order and states which he or she prefers.
Madan has scored 83.0 on the test. What is the probability that he will be paired with someone whose score was within 5.0 points of his own?
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