Mathematics, 05.12.2019 21:31, lilyella1004
Several years ago, the mean height of women 20 years of age or older was 63.7 inches. suppose that a random sample of 45 women who are 20 years of age or older today results in a mean height of 64.2 inches(a) state the appropriate null and alternative hypotheses to assess whether women are taller today. a) h0: u = 64.2 in. versus h1: u not equal to 64.2 in. b) h0: u = 63.7 in. versus h1: u not equal to 63.7 in. c) h0: u = 63.7 in. versus h1: u > 63.7 in. d) h0: u = 63.7 in. versus h1: u < 63.7 in. e) h0: u = 64.2 in. versus h1: u > 64.2 in. f) h0: u = 64.2 in. versus h1: u < 64.2 in.(b) suppose the p-value for this test is 0.18. explain what this value represents. a) there is a 0.18 probability of obtaining a sample mean height of 63.7 inches or taller from a population whose mean height is 64.2 inches. b) there is a 0.18 probability of obtaining a sample mean height of exactly 64.2 inches from a population whose mean height is 63.7 inches. c) there is a 0.18 probability of obtaining a sample mean height of 64.2 inches or taller from a population whose mean height is 63.7 inches. d) there is a 0.18 probability of obtaining a sample mean height of 64.2 inches or shorter from a population whose mean height is 63.7 inches.(c) write a conclusion for this hypothesis test assuming an a = 0.05 level of significance. a) do not reject the null hypothesis. there is not sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. b) reject the null hypothesis. there is sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. c) reject the null hypothesis. there is not sufficient evidence to conclude that the mean height of women 20 years of age or older is greater today. d) do not reject the null hypothesis. there is sufficient evenidence that the mean height of women 20 years of age or older is greater today.
Answers: 3
Mathematics, 22.06.2019 01:20, lillyd2873
The first week samantha learned to read braille, she could read 10 words per minute. in the second week she increased her speed by 20%. in the third week she increased her speed again by another 25%. how many words could she read per minute by the third week? hurry and tell me!
Answers: 1
Mathematics, 22.06.2019 01:50, Savageman9509
The length of time it takes to find a parking space at 9 a. m. follows a normal distribution with a mean of 5 minutes and a standard deviation of 2 minutes. find the probability that it takes at least 8 minutes to find a parking space. (round your answer to four decimal places.)
Answers: 1
Several years ago, the mean height of women 20 years of age or older was 63.7 inches. suppose that a...
Mathematics, 21.01.2021 22:40
Mathematics, 21.01.2021 22:40
Mathematics, 21.01.2021 22:40