Question

A company has set a goal of developing a battery that lasts over 5 hours (300 minutes) in continuous use. The first test of 12 Of these batteries measured the following lifespans (in minutes): 321, 295, 332, 351, 281, 336, 311, 253, 270, 326, 311, and 288.

1.Enter the data in to Minitab.

2. Create the 90% confidence interval for the mean life span of this type of battery in Minitab. Copy and paste your Minitab output below.

3.Provide the following information: Critical t-value ( for the 90% CI: Degrees of freedom of the T-model: Sample mean of lifespan: Sample standard deviation of lifespan

4. Interpret your 90% confidence interval. 5. Do you think the company has met their goal? Explain. (just yes or no answers without a reasonable explanation will receive 0 points)

Answer #1

A company has set a goal of developing a battery that lasts over
5 hours (300 minutes) in continuous use. A first test of 12 Of
these batteries measured the following lifespans (in minutes): 321,
295, 332, 351, 281, 336, 311, 253, 270, 326, 311, and 288.
3.Provide the following information: Critical t-value ( for the
90% CI: Degrees of freedom of the T-model: Sample mean of lifespan:
Sample standard deviation of lifespan
4. Interpret your 90% confidence interval.
5....

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days.
The exact time in a non-leap year is ? days
The exact time in a leap year is ? days.
Data Table
Sequential Numbers for Dates of the Year
Day of Month
Jan.
Feb.
Mar.
Apr.
May
June
July
Aug.
Sept.
Oct.
Nov.
Dec.
1
1
32
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91
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Click to download the data in your preferred format.
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Your firm works in construction and buys ASTM A325M8S bolts in
very large numbers. You are interested in purchasing bolts from
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bolts from three suppliers: Allnutt, Boltzman, Coachers.You have
tested these in your new bolt testing machine, purchased after you
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