Question

(1) How much does a sleeping bag cost? Let's say you want a
sleeping bag that should keep you warm in temperatures from 20°F to
45°F. A random sample of prices ($) for sleeping bags in this
temperature range is given below. Assume that the population of
*x* values has an approximately normal distribution.

105 | 115 | 45 | 110 | 115 | 115 | 30 | 23 | 100 | 110 |

105 | 95 | 105 | 60 | 110 | 120 | 95 | 90 | 60 | 70 |

x = | $ |

s = |
$ |

=

(b) Using the given data as representative of the population of prices of all summer sleeping bags, find a 90% confidence interval for the mean price μ of all summer sleeping bags. (Round your answers to two decimal places.)

lower limit | $ |

upper limit | $ |

=

(4) Use the STUDENT'S *T* DISTRIBUTION CHART to find
*t*_{c} for a 0.95 confidence level when
the sample is 8. (Round your answer to three decimal places.)

=

(5) Student's *t* distributions are symmetric about a
value of *t*. What is that *t* value?

=

(2) Over the past several months, an adult patient has been
treated for tetany (severe muscle spasms). This condition is
associated with an average total calcium level below 6 mg/dl.
Recently, the patient's total calcium tests gave the following
readings (in mg/dl). Assume that the population of *x*
values has an approximately normal distribution.

9.9 | 8.6 | 10.3 | 9.5 | 9.4 | 9.8 | 10.0 | 9.9 | 11.2 | 12.1 |

(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean reading *x* and the sample
standard deviation *s*. (Round your answers to two decimal
places.)

x = |
mg/dl |

s = |
mg/dl |

=

(b) Find a 99.9% confidence interval for the population mean of
total calcium in this patient's blood. (Round your answer to two
decimal places.)

lower limit | mg/dl |

upper limit | mg/dl |

=

(3) Do you want to own your own candy store? Wow! With some
interest in running your own business and a decent credit rating,
you can probably get a bank loan on startup costs for franchises
such as Candy Express, The Fudge Company, Karmel Corn, and Rocky
Mountain Chocolate Factory. Startup costs (in thousands of dollars)
for a random sample of candy stores are given below. Assume that
the population of *x* values has an approximately normal
distribution.

92 | 177 | 132 | 97 | 75 | 94 | 116 | 100 | 85 |

(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean startup cost *x* and sample
standard deviation *s*. (Round your answers to one decimal
place.)

x = |
thousand dollars |

s = |
thousand dollars |

=

(b) Find a 90% confidence interval for the population average
startup costs *μ* for candy store franchises. (Round your
answers to one decimal place.)

lower limit | thousand dollars |

upper limit | thousand dollars |

=

Answer #1

1. How much does a sleeping bag cost? Let's say you want a
sleeping bag that should keep you warm in temperatures from 20°F to
45°F. A random sample of prices ($) for sleeping bags in this
temperature range is given below. Assume that the population of
x values has an approximately normal distribution.
75
95
55
105
110
115
30
23
100
110
105
95
105
60
110
120
95
90
60
70
(a) Use a calculator with mean...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x
values has an approximately normal distribution.
120
110
110
65
105
115
30
23
100
110
105
95
105
60
110
120
95
90
60
70
(a) Use a calculator with mean and...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x values has an
approximately normal distribution.
55
105
110
115
100
50
30
23
100
110
105
95
105
60
110
120
95
90
60
70
(a) Use a calculator with mean and...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x
values has an approximately normal distribution.
70
50
115
110
35
100
30
23
100
110
105
95
105
60
110
120
95
90
60
70
(a) Use a calculator with mean and...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x values has an
approximately normal distribution. 45 100 115 55 85 120 30 23 100
110 105 95 105 60 110 120 95 90 60 70 (a) Use a calculator with
mean and...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x values has an
approximately normal distribution. 50 85 115 35 70 75 30 23 100 110
105 95 105 60 110 120 95 90 60 70
(a) Use a calculator with mean and...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x
values has an approximately normal distribution.
105
35
105
75
110
50
30
23
100
110
105
95
105
60
110
120
95
90
60
70
(a) Use a calculator with mean and...

1) Do you want to own your own candy store? Wow! With some
interest in running your own business and a decent credit rating,
you can probably get a bank loan on startup costs for franchises
such as Candy Express, The Fudge Company, Karmel Corn, and Rocky
Mountain Chocolate Factory. Startup costs (in thousands of dollars)
for a random sample of candy stores are given below. Assume that
the population of x values has an approximately normal
distribution.
96
176...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x values has an
approximately normal distribution.
70 85 105 115 60 110 30 23 100 110 105 95 105 60 110 120 95 90
60 70
(b) Using the given data as representative...

How much does a sleeping bag cost? Let's say you want a sleeping
bag that should keep you warm in temperatures from 20°F to 45°F. A
random sample of prices ($) for sleeping bags in this temperature
range is given below. Assume that the population of x values has an
approximately normal distribution.
55 100 100 100
105 40 30 23
100 110
105 95 105 60
110 120 95 90
60 70
(a) Use a calculator with mean and...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 17 minutes ago

asked 25 minutes ago

asked 45 minutes ago

asked 49 minutes ago

asked 55 minutes ago

asked 56 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago