- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 1 (44.4 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 2 (36.13 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 3 (55.67 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 4 (38.28 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 5 (42.58 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 6 (45.19 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 7 (40.88 KiB) Viewed 46 times
- 1 You Randomly Select 24 Newly Constructed Houses The Sample Mean Construction Cost Is 182 000 And The Population Sta 8 (36.25 KiB) Viewed 46 times
6. A government surveillance association claims that 70% of people agree that the government is inefficient and wasteful. You work for a government agency and are asked to test this claim. You find that in a random sample of 1165 people, 785 agreed with this view. The p value for the test is (2 Points) 0.0256 0.0512 0.0312 0.0156
5. A manufacturer claims that the mean lifetime of its light bulbs is 47 months. 150 bulbs are selected at random, and their mean lifetime is found to be 48 months and their standard deviation is found to be 4 months. In order to test the claim at the 0.01 level of significance, that the mean lifetime of light bulbs made by this manufacturer differs from 47 months, what would be our decision? (2 Points) O Reject HO Accept HO
4. In a hypothesis test for population mean, p value is found to be 0.0143. Which of the following is true? (1 Point) We fail to reject HO at 5% level of significance. We fail to reject HO at 10% level of significance We fail to reject HO at 1% level of significance. We reject HO at 1% level of significance.
3. The Nature's way vitamin company sells vitamin tablets that claim to have less than 500 mg of vitamin C. A sample of 25 tablets has a mean of 492mg, and a standard deviation of 19.5. Assume that the population is normally distributed. The value of the standardized test statistic is (1 Point) z z = -2.051 O z = - 2.751 = O t= -2.051 O t= -2.751
1. A car company claims that the mean gas mileage for its luxury cars is at least 23 miles per gallon (mpg).To test the claim a random sample of 5 cars has selected and found a mean gas mileage of 20 mpg and a standard deviation of 4 mpg. Which of the following test will be conducted to test the claim? (1 Point) Right tailed test Left tailed test Two tailed test Zero tailed test
2. You draw a random sample of size 20 from a normal population. You find that the sample mean is 54 and sample standard deviation is 15.4. Using these data, which distribution should you use to construct a 99% confidence interval for the population mean? (3 Points) 31 < u < 37 38 < μ< 39 Ο 31 < μ< 35 35 < u < 37
4. In a survey of 282 smokers, 206 smokers reported that they wanted to quit smoking. Find the 90% confidence interval for the proportion of smokers who wish to quit smoking. (1 Point) 0.087 < p < 0.774 O 0.687 < p < 0.474 0.787 < p < 0.774 0.687 < p < 0.774