Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 1150 Gy (grays). (For comparison, humans cannot 25 randomly selected tardigrade colonies, finding that the amount of gamma radiation withstand more than 10 Gy.) A study was conducted on a sample needed to sterilize a colony had a sample mean of 1165 Gy, with a sample standard deviation of 62 Gy. Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that u, the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 1150 Gy. (a) State the null hypothesis H and the alternative hypothesis H, that you would use for the test.
Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 1150 Gy (grays). (For comparison, humans cannot 25 randomly selected tardigrade colonies, finding that the amount of gamma radiation withstand more than 10 Gy.) A study was conducted on a sample needed to sterilize a colony had a sample mean of 1165 Gy, with a sample standard deviation of 62 Gy. Assume that the population of amounts of gamma radiation needed to sterilize a colony of tardigrades is approximately normally distributed. Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that u, the mean amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 1150 Gy. (a) State the null hypothesis H and the alternative hypothesis H, that you would use for the test.
MATLAB: An Introduction with Applications
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Chapter1: Starting With Matlab
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Transcribed Image Text:Tardigrades, or water bears, are a type of micro-animal famous for their resilience. In examining the effects of radiation on organisms, an expert claimed that
the amount of gamma radiation needed to sterilize a colony of tardigrades no longer has a mean of 1150 Gy (grays). (For comparison, humans cannot
withstand more than 10 Gy.) A study was conducted on a sample of 25 randomly selected tardigrade colonies, finding that the amount of gamma radiation
needed to sterilize a colony had a sample mean of 1165 Gy, with a sample standard deviation of 62 Gy. Assume that the population of amounts of gamma
radiation needed to sterilize a colony of tardigrades is approximately normally distributed.
Complete the parts below to perform a hypothesis test to see if there is enough evidence, at the 0.05 level of significance, to support the claim that u, the mean
amount of gamma radiation needed to sterilize a colony of tardigrades, is not equal to 1150 Gy.
00
(a) State the null hypothesis H and the alternative hypothesis H, that you would use for the test.
Ho: 0
H,: 0
O<O
OSO
O=0
ロロ
(b) Perform at test and find the p-value.
Here is some information to help you with your t test.
• The value of the test statistic is given by t=
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Transcribed Image Text:Student's t Distribution
0.4
Step 1: Enter the number of degrees
of freedom.
Step 2: Select one-tailed or two-tailed.
0.3-
O One-tailed
O Two-tailed
Step 3: Enter the test statistic.
(Round to 3 decimal places.)
0.2
Step 4: Shade the area represented by
the p-value.
0.1
Step 5: Enter the p-value.
(Round to 3 decimal places.)
2.
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