Question

# ON GRAPHING CALCULATOR PLEASE 7. A survey of 50 people was conducted to compare their self-reported...

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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