ON GRAPHING CALCULATOR PLEASE
7. A survey of 50 people was conducted to compare their
self-reported height to their actual height. The difference between
reported height and actual height was calculated.
You're testing the claim that the mean difference is greater than
1.3.
From the sample, the mean difference was 1.6, with a standard
deviation of 0.44.
Calculate the test statistic, rounded to two decimal places
9. We considered the differences between the temperature
readings in January 1 of 1968 and 2008 at 51 locations in the
continental US in Exercise 5.19. The mean and standard deviation of
the reported differences are 1.1 degrees and 4.9 degrees
respectively.
(a) Calculate a 90% confidence interval for the average difference
between the temperature measurements between 1968 and 2008.
lower bound: degrees(please round to two decimal
places)
upper bound: degrees(please round to two decimal
places)
4. You wish to test the following claim (HaHa) at a
significance level of α=0.10α=0.10.
Ho:p1=p2Ho:p1=p2
Ha:p1≠p2Ha:p1≠p2
You obtain 140 successes in a sample of size n1=444n1=444 from the
first population. You obtain 157 successes in a sample of size
n2=754n2=754 from the second population. For this test, you should
NOT use the continuity correction, and you should use the normal
distribution as an approximation for the binomial
distribution.
t test = 4.146
What is the p-value for this sample? (Report answer accurate to
four decimal places.)
p-value =
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