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Marianna [84]
3 years ago
6

Olivia works at a company that creates mobile phones. She wanted to estimate the mean amount of time their new phone's battery l

asts with regular use after a full charge. She took a random sample of 6 of these phones and randomly assigned each of them to a volunteer. She instructed them to fully charge the phones and use them as they regularly would until the battery died (without recharging the phone). Here are the data they reported:
Assume that all conditions for inference are met.
Which of the following is a 90% confidence interval for the mean battery life (in hours)?
Mathematics
1 answer:
Anna007 [38]3 years ago
8 0

Answer:

9+- 1.7

Step-by-step explanation:

Kahn

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*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^*^

1. Let's write out the equation to subtract.

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8 0
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Answer:

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Step-by-step explanation:

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3^{rd}\text{ sample was done in June with a sample size n = 100}

4^{th}\text{ sample was done in September with a sample size n = 100}

Hence, there were total 4 samples collected and each sample had a sample size of n = 100.

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Answer:

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