In a sample of 58 men, 44 said that they had less leisure time today than they had 10 years ago. In a sample of 58 women, 36 women said that they had less leisure time today than they had 10 years ago. At a=0.10, is there a difference in the proportions? Use p, for the proportion of men with less leisure time. Part: 0 / 6

Using a random sample of 4000 TV households, a media research company found that 65.8% watched the final episode of a long-running popular series. The margin of error in this percent was 1.6%. In a later study, the same media research company increased its random sample to 5900. By how much did this improve the margin of error? The margin of error improved by %. (Round to the nearest tenth as needed.)

In 2016 the Better Business Bureau settled 84% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.84, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(p) (to 2 decimals) (to 4 decimals) b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.04 of the population proportion (to 4 decimals)? probability : = c. Suppose you select a sample of 460 complaints involving new car dealers. Show the sampling distribution of p. E(F) (to 2…

Empathy means being able to understand what others feel. To see how the brain expresses empathy, researchers recruited 16 couples in their midtwenties who were married or had been dating for at least two years. They zapped the man's hand with an electrode while the woman watched, and measured the activity in several parts of the woman's brain that would respond to her own pain. Brain activity was recorded as a fraction of the activity observed when the woman herself was zapped with the electrode. The women also completed a psychological test that measures empathy. 8 9 10 Subject Empathy Score Brain Activity -0.102 0.396 0.0120.38 0.035 0.406 0.102 0.517 0.14 0.744 0.246 0.575 0.216 0.719 0.368 0.775 2 3 4 6 11 12 13 14 15 16 43 47 45 55 56 61 58 54 40 52 55 60 10 67 31 100 1.2 sub ject 2 . 8,1 F20 126 -8,4 Given that the equation for the regression line is y 0.00754r – 0.04734, what is the residual for subject 2? ANSWER:

Q3. Please answer fill-ins.

A survey of 700 non fatal accidents showed that 287 involved defective equipment.  Find a point estimate for p, the population proportion of accidents that involved defective equipment and round to 4 decimal places if needed.

You are testing the claim that the proportion of men who own cats is larger than the proportion of women who own cats. You sample 110 men, and 25% own cats. You sample 150 women, and 85% own cats. Find p (p-bar), as a decimal, rounded to two decimal places.

Empathy means being able to understand what others feel. To see how the brain expresses empathy, researchers recruited 16 couples in their midtwenties who were married or had been dating for at least two years. They zapped the man's hand with an electrode while the woman watched, and measured the activity in several parts of the woman's brain that would respond to her own pain. Brain activity was recorded as a fraction of the activity observed when the woman herself was zapped with the electrode. The women also completed a psychological test that measures empathy. Subject 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Empathy Score     43 46 35 59 64 66 58 47 44 49 56 68 28 71 27 108 Brain Activity -0.129 0.389 0.019 0.378 0.016 0.419 0.109 0.515 0.149 0.746 0.245 0.57 0.219 0.716 0.364 0.762 Given that the equation for the regression line is y^=0.00709x−0.04187y^=0.00709x−0.04187, what is the residual (or deviation), yi−y^iyi−y^i, for subject 14?ANSWER:    Speak

How high must a vehicle's gas mileage be in order to fall in the top 15% of all vehicles?

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