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Q1) Do reading and TV viewing compete for leisure time? To determine, a communication specialist interviewed sample of 10 children regarding number of books they had read in the last year and number of hours they had spent watching TV on daily basis. Researcher was nice sufficient to give you following information:
i) Use alpha level. 05 to compute and interpret Pearson's r and to test whether it is important (using all your steps for hypothesis test).
ii) Use alpha level .05 to compute and interpret constant and slope and to test whether it is important (go through all of your steps of hypothesis testing). Standard error of b is .015.
books
tv hours
(x-xbar)
(y-ybar)
(x-xbar)2
y-ybar)2
(x-xbar)2(y-ybar)2
(x-xbar)(y-ybar)
0
3
-2.6
0.5
6.76
0.25
1.69
-1.3
7
1
4.4
-1.5
19.36
2.25
43.56
-6.6
2
-0.6
-0.5
0.36
0.09
0.3
-1.6
2.56
0.64
0.8
5
2.4
-2.5
5.76
6.25
36
-6
4
1.4
1.96
4.41
-2.1
0.4
0.16
0.04
0.2
-0.2
4.5
20.25
136.89
-11.7
1.5
-2.4
26
25
46.4
34.5
229.12
-29
Mean = 2.6
2.5
The probability of obtaining a random sample mean, which is lower than the population mean, is:
Such things as historical documents, newspaper reports, TV and radio broadcasts, when used in research, represents
At the .05 significance level, can we conclude that the guideline is still reasonable?
We are asked to test for independence between age (i.e., adult and teen) and drink preferences.
Is there evidence to suggest a difference in the mean waiting times at the four body shops?
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.
A point estimate for the difference between the mean purchases of the users of the two credit cards is:
Romance USA present reported that 11 percent of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day
Calculate expected number of interruptions per day. Calculate standard deviation.
The resort's historical climate data suggests that the probability of a good winter with lots of snow during any given year is 40%.
Do students tend to improve their SAT Mathematics (SAT-M) score the second time they take the test? A random sample of four students who took the test twice received the following scores
Probability that the entire batch will be rejected?
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