# Chapter 1. Stating Hypotheses

true
Stat Tutor
true
true

0:54

### Question 1.1

RgFGZ928mQm4mdmL/a3w3wdjpvCR6ssbg4kmiycOBV3ZQqfJyQxVgjFEyPEJ0oEJXV4HUBBl+PGoLvyqZ96+VhSfFrH4QxT/RIDM1MUVvSN2CiwRuk49mbQ9j5Nxo0v0MC5DFiNIf1Br/4nFYMrVnJNZi0UmE7hXBEZF5JCUEobDuCHGEefjnCtswfK4DSOrNUCAlLLAOKcYA4ga/vCzD95/b5WaOPyBtWxc3MSQqDKjvfBOICrI5pnIzaR7cYpDBanU8+P3QEc2z8YDeaOoguoxzRXzq8PVvEqhTAbrlnQcCxM4Ca+3/3+WxEsEEIUP
Incorrect. We compute probabilities on statistics and statistic values, not on parameters and parameter values. So, we conclude a claim about a parameter is incorrect when the probability of getting a statistic at the value observed is very small.
Correct. We compute probabilities on statistics and statistic values, not on parameters and parameter values. So, we conclude a claim about a parameter is incorrect when the probability of getting a statistic at the value observed is very small.
Incorrect. Try again.
2

1:52

### Question 1.2

j2vTuHls6Y1Sv8fZiS6Tp7WZO2uDTWg2UvrKkanubFgmBSWQRNDHWfsdUmvAc8k7QDyWwmObyh5FrVILwmNLJ5Iz3X/lHaaN1LoGsqVY6AwBlRCI
Incorrect. The symbol for the null hypothesis is H0.
Correct. The symbol for the null hypothesis is H0.
Incorrect. Try again.
2

2:38

### Question 1.3

m33G0LXthMPJTsB0X3LMCL9NDB4xH0JGQ4wo1hV9oAGLc4OyZx5x7HQKTyla93WPiYxiYNLsfMg/EC9nLKgklMuiI2BvZ9OTE5T4vky3KqFFeWRuyyFeEm2byKmINh7J6dDXNXelW23xTFWH2Rs2pryRq5mAtQpZorgJelDTYdGXX4VsKVR4N/L8CwiS33D/pqeu5HMlPhJjkFoGcJ0pTe6q9Rw6fk7+uxpwzMcikAwA4upZY6KQ9aoKBvE5StMQGMY9hdT7rbAgrEy2pETmbKS+qrhyWJCQH7cQ5/EhTQVhRcrxJCe1GUNPFurwhnDXCq0IxTJjJHvbKCrkjG007wHUXROY5ed0/CthUdIYLNSEXU1SPrEBql07Cm5M0wIamsDKqZnl5on5F5Z9GhCvPPrTFogAfxOtfm3yHrEIOtQ527KgGG3xug4eNGs=
Incorrect. µ represents the mean of all bottles of chocolate milk filled by the machine.
Correct. µ represents the mean of all bottles of chocolate milk filled by the machine.
Incorrect. Try again.
2

3:53

### Question 1.4

0RjRz3OXvVByPXb1Zxgqv0inYuOI4j9JNIsj8qWR058ZLfZleWQMOIZD1eCu8m0YmIID6J9EZAtW2SjrIMTchKy0a4k8EZaULpTABsdacjmjzOTMs/ALenbPjyXkgE33yIHwHcxOM5vI4R8k
Incorrect. This is a correct statement.
Correct. This is a correct statement.
Incorrect. Try again.
2

5:06

### Question 1.5

Incorrect. We usually wish to find evidence "against" the null hypothesis.
Correct. We usually wish to find evidence "against" the null hypothesis.
Incorrect. Try again.
2

### Question 1.6

YSxFBqYVrnMFVBdHpK4iOaQ9WFHldBwHS/81yvLstQhrfR+hJETUq9krka0Y9BFfcprsd9jCI0Z+2rXv2NFBbcNGHfkRZY/zXmwlvdca6S7TT53xblOlQm+nD5pmCD3pt8SENTji8ldvR3KQBSuFg9S6vQ/biE39XKxiWZb3E7F7JPF4GCKBFyZJOC5ijGKh
Incorrect. Since we wish to decide whether the mean is "greater than" 16, we use the "greater than" symbol: ">" in Ha.
Correct. Since we wish to decide whether the mean is "greater than" 16, we use the "greater than" symbol: ">" in Ha.
Incorrect. Try again.
2

5:37

### Question 1.7

Incorrect. Since we wish to decide whether the mean is "less than" 16, we use the "less than" symbol: "<" in Ha.
Correct. Since we wish to decide whether the mean is "less than" 16, we use the "less than" symbol: "<" in Ha.
Incorrect. Try again.
2

6:10

### Question 1.8

h7llTRk08y0mwgswFTPsTmFEaeomBWcyNVHz/op3YPlg6fKVahYljfEm/oMjqwq1X2zjWViVY18M3tcU2YkjdY84Jr8nRxQez2zeKYVTylvh44yz5TQA2COEk/GtZT1M8mPzqZp0C0eDcggtSB4Q+jyMt/YGlFnYxYM4stS4DDoNtNmX
Incorrect. Since we wish to decide whether the mean is "changed from" 16, we use the "not equal to" symbol: "$$\neq$$" in Ha.
Correct. Since we wish to decide whether the mean is "changed from" 16, we use the "not equal to" symbol: "$$\neq$$" in Ha.
Incorrect. Try again.
2

8:34

### Question 1.9

+ROdmXf1Bk1en0oyUGOUStgSVn8xNMmfi+ZJ6DjAs7GpesJfmw3K/EhLjwZy2JGhviBIQ/q56mvxd2LiHky7qGrCTGhdYjOn9sq2wc2FDNKO8FR+R4ZAuOpkE4QS0nklY6AebCD+1zAmDB5+6CEr04kR1vArW9UfQtHU4Lo7s7QDhutZJqCmLv7b0Fs=
Incorrect. Since we wish to decide whether the mean is "less than" 75.6, we use the "less than" symbol: "<" in Ha.
Correct. Since we wish to decide whether the mean is "less than" 75.6, we use the "less than" symbol: "<" in Ha.
Incorrect. Try again.
2

8:58

### Question 1.10

ivinQ1sMGslgrIZ3cQiZjN+hd9xpkVvBMy003x2b9mWYBS5L2YQK3xeYBqeegkXb00Dpv7T9TmZPTD3lxQgQY6JRwblFOlIN+BOyx9Va5azv+jOTve0kpz2UPE+cjfYUt8ewtg7UpwRUmNnZsGktgb83eS9pYizTg6J47BAXU+RFkAyk0DvZt134ZDgdzpBsNeFEVoWLaqgLrDPU/UKJJLjGC94L3gn8nvjxlwxl+nE8MbLYTYNzkkJ6qbD1H02Y6FIXqZp7skCyLSDVE8EBkTSIFgszlaG2HZVuyMdoNqfHUF1Aku7kId2VPjgsPpzno7ANfTNlFyoIuokkl0ap23bdlHXRlZfd7TVfuaVSsoAA563dNYrjxPB0x5esR5/M
Incorrect. “<” or “>” in Ha is a one-sided test.
Correct. “<” or “>” in Ha is a one-sided test.
Incorrect. Try again.
2

9:44

### Question 1.11

0GNHKd4CoV9jiWlBrs45HDTtFv6cxapI4BZFra49B0y2Wf2fjgnKeiXC+Xw2foNHs2ETl1LF+z2LAbAKUq4vSjFzXkpxXd5+j0QFtmIuqd6IUuza742VES2bOtKSqIhr7TwBjqfuNlcbJi4oHSJP2FlWp67Tm2NV7q1GC1ZvgxKTIMmK6azswI7X2tU=
Incorrect. Since we wish to decide whether the mean is “greater than” 3, we use the “greater than” symbol: “>” in Ha.
Correct. Since we wish to decide whether the mean is “greater than” 3, we use the “greater than” symbol: “>” in Ha.
Incorrect. Try again.
2

9:59

### Question 1.12

yJXU/pVWatW5Ns0B6OpU5l4jT6gUVIll//z4TZVr1C+bR699K6Xs2SSJViBy8+X5Bh7iNTlA8A6CcblqeVcjrGMOW0OhblF7EIU0eq0iz9hSbd37sUgJRbXHJ//y0pCQKsAuP5/lGIhJiGpwALEELBig4wkwQp5GGns/RBlRQsryEUEO8fZdTe0PC6llmTxi3b3OyES0pWhpT5A5uuDIODnsBQlKvknhAoznT26x61zQawUF0/bjXUhPAj38OOqcXBqAv5AAEGmFdo3KChVtI6ZG2KVT16WR99zpmK0YHMwwPmTlrj6dcd1xraTf4C6mQEm/ujkRlCUDgShsmaF1IR1YErvMVb+b69BE/FGZzZn42WHZ
Incorrect. “<” or “>” in Ha is a one-sided test.
Correct. “<” or “>” in Ha is a one-sided test.
Incorrect. Try again.
2

10:41

### Question 1.13

qZoh88ZJgiRRMTDB5ZaZgd/0xvm/8eCEUMX4W578MjMV0/CZD8yAzdqB6jU78x7lXck5O82bqMhNxEgmunG7LjclgVXvryWWsvXZbu25ATlTAMZ9ZFdCzANrVyt16ncSeay+3R+lsTBbD7aC3sV+9F4Qc5XakZNFgHeTSb8RhD2gzszvc2Bl+k2D9kUUquFM
Incorrect. Since we wish to decide whether the mean has “changed from” 11.5, we use the “not equal to” symbol: “$$\neq$$” in Ha.
Correct. Since we wish to decide whether the mean has “changed from” 11.5, we use the “not equal to” symbol: “$$\neq$$” in Ha.
Incorrect. Try again.
2

11:00

### Question 1.14

r02olSu2EzFNXgFnJhP3ctzGUKVR9Famno+CcBSQPR21iEeIfdREuedmBxRQt7DGFPbUZoZr9e50J5vsWCWpH+y7HgLpxF4GmEXbaZnivBioRbgY7aNrr47BWmdg8U/vHHAwp1a50LS7DaI+1sxbf7Lt3W+vyEiZc5BLb/hVxwVfJW2ejTMRaa8QETzQG8lXcsIPUN8NrHslGmq/rO/Tu81RBboQN4kYximB/MV8bwyxJuF2EGwaIon3YAlPH/fb0KLtF+JYLrjE1vcFSF5ZnW0yApcpbWEktl56KnItP+gkrQinUlITFB9yHayFN7jfDKhnp5svKrmL84SR0Xm9thnRTCrsI7kAf6wiG58opHGXIGtc41lEtNmLf97ZwnQg2CAqD00L+BkCrbSnkd+1W1f9SyRRq2lA
Incorrect. "$$\neq$$" in Ha is a two-sided test.
Correct. "$$\neq$$" in Ha is a two-sided test.
Incorrect. Try again.
2

12:33

### Question 1.15

cJu+ZL1NnZ+nS8GVwYHIw+fgWKMH3Bz/pY+YNgEhoHfLaljumaz1jbXijI4Dt6Phk+/9c3praysuBUkO2HgH7u7rF/q2DJBMpazY8ehx+qnTgniBPeOpFJ+PaIqScZm036iIqKS68NhPtblO2ODQPG7rUrubtlnW
Incorrect. Hypotheses are claims about parameter values, so parameter symbols must always be used in hypotheses. Statistic symbols are NEVER to be used in hypotheses.
Correct. Hypotheses are claims about parameter values, so parameter symbols must always be used in hypotheses. Statistic symbols are NEVER to be used in hypotheses.
Incorrect. Try again.
2