A random sample of boots worn by 36 soldiers in a desert region showed an average life of 1.08 years with a standard deviation of 0-6 years. Under the standard conditions, the boots are known to have an average life of 1:28 years. Is there a reason to assert, at 1% level of significance, that use in desert causes the mean life of such boots to decrease? What will be your conclusion if the level of significance is 5% ? Assume that the life of boots is normally distributed.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2900 grams and a standard deviation of 900 grams while babies born after a gestation period of 40 weeks have a mean weight of 3400 grams and a standard deviation of 535 grams. If a 35-week gestation period baby weighs 3200 grams and a 40-week gestation period baby weighs 3700 grams, find the corresponding z-scores. Which baby weighs more relative to the gestation period? Find the corresponding z-scores. Which baby weighs relatively more? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. The baby born in week 40 weighs relatively more since its z-score, baby born in week 35. B. The baby born in week 35 weighs relatively more since its z-score, baby born in week 40. C. The baby born in week 40 weighs relatively more since its z-score, baby born in week 35. D. The baby born in week 35 weighs relatively more since its z-score,…

You have obtained the number of years of education from one random sample of 38 police officers from City A and the number of years of education from a second random sample of 30 police officers from City B. The average years of education for the sample from City A is 15 years with a standard deviation of 2 years. The average years of education for the sample from City B is 14 years with a standard deviation of 2.5 years. Is there a statistically significant difference between the education levels of police officers in City A and City B?What is the appropriate test for this case? 2 sample z-testChi-square test     2-sample t-test2 sample paired t-test Carry out the test. The test statistic =   (round answer to two decimal places.)and the p-value is   (round answer to 2 decimal places)There     sufficient evidence at the 5% level to conclude that the education levels of police officers in City A and City B is significantly different.

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 2700 grams and a standard deviation of 600 grams while babies born after a gestation period of 40 weeks have a mean weight of 3200 grams and a standard deviation of 425 grams. If a 35​-week gestation period baby weighs 2850 grams and a 41​-week gestation period baby weighs 3350 ​grams, find the corresponding​ z-scores. Which baby weighs more relative to the gestation​ period?