Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of ten months with a sample standard deviation of five months. Assume that the underlying population distribution is normal. O Part (a) (i) Enter an exact number as an integer, fraction, or decimal. x = (ii) Enter an exact number as an integer, fraction, or decimal. Sy = (ii) Enter an exact number as an integer, fraction, or decimal. n= (iv) Enter an exact number as an integer, fraction, or decimal. n-1 = O Part (b) Define the random variable X in words. O The mean amount of time a single child uses training wheels.

MATLAB: An Introduction with Applications
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Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of ten months with a sample standard deviation of five months. Assume that the underlying population distribution is normal.

### Part (a)

(i) Enter an exact number as an integer, fraction, or decimal.  
\( \overline{x} = \_

(ii) Enter an exact number as an integer, fraction, or decimal.  
\( s_{x} = \_

(iii) Enter an exact number as an integer, fraction, or decimal.  
\( n = \_

(iv) Enter an exact number as an integer, fraction, or decimal.  
\( n - 1 = \_

### Part (b)

Define the random variable \( X \) in words.

- [ ] The mean amount of time a single child uses training wheels.
- [ ] The amount of time a single child uses training wheels.
- [x] The mean length of time for training wheels usage from a sample of 14 children.
- [ ] The population mean amount of time for training wheels usage for children.

### Part (c)

Define the random variable \( \overline{X} \) in words.

- [ ] The mean amount of time a single child uses training wheels.
- [ ] The amount of time a single child uses training wheels.
- [x] The mean length of time for training wheels usage from a sample of 14 children.
- [ ] The population mean amount of time for training wheels usage for children.
Transcribed Image Text:Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of ten months with a sample standard deviation of five months. Assume that the underlying population distribution is normal. ### Part (a) (i) Enter an exact number as an integer, fraction, or decimal. \( \overline{x} = \_ (ii) Enter an exact number as an integer, fraction, or decimal. \( s_{x} = \_ (iii) Enter an exact number as an integer, fraction, or decimal. \( n = \_ (iv) Enter an exact number as an integer, fraction, or decimal. \( n - 1 = \_ ### Part (b) Define the random variable \( X \) in words. - [ ] The mean amount of time a single child uses training wheels. - [ ] The amount of time a single child uses training wheels. - [x] The mean length of time for training wheels usage from a sample of 14 children. - [ ] The population mean amount of time for training wheels usage for children. ### Part (c) Define the random variable \( \overline{X} \) in words. - [ ] The mean amount of time a single child uses training wheels. - [ ] The amount of time a single child uses training wheels. - [x] The mean length of time for training wheels usage from a sample of 14 children. - [ ] The population mean amount of time for training wheels usage for children.
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