Question

What percentage of hospitals provide at least some charity care? Based on a random sample of hospital reports from eastern states, the following information is obtained (units in percentage of hospitals providing at least some charity care):

57.4 | 56.3 | 53 | 65.7 | 59.0 | 64.7 | 70.1 | 64.7 | 53.5 | 78.2 |

Assume that the population of *x* values has an
approximately normal distribution.

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

**x bar = ? %**

**s = ? %**

(b) Find a 90% confidence interval for the population average μ of the percentage of hospitals providing at least some charity care. (Round your answers to one decimal place.)

**lower limit = ? %**

**upper limit + ? %**

Answer #1

a. %

Create the following table.

data | data-mean | (data - mean)^{2} |

57.4 | -4.86 | 23.6196 |

56.3 | -5.96 | 35.5216 |

53 | -9.26 | 85.7476 |

65.7 | 3.44 | 11.8336 |

59.0 | -3.26 | 10.6276 |

64.7 | 2.44 | 5.9536 |

70.1 | 7.84 | 61.4656 |

64.7 | 2.44 | 5.9536 |

53.5 | -8.76 | 76.7376 |

78.2 | 15.94 | 254.0836 |

Find the sum of numbers in the last column to get.

So standard deviation is %

b. t value for 9 df is TINV(0.1,9)=1.8

So Margin of Error is

Hence CI is

So lower limit is 57.7%

Upper limit is 66.9%

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care): 57.1 56.1 53.2
65.7 59.0 64.7 70.1 64.7 53.5 78.2
Assume that the population of x values has an approximately
normal distribution. (a) Use a calculator with mean and sample
standard deviation keys to find the sample mean percentage x and
the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care):
57.2
55.7
52.9
65.7
59.0
64.7
70.1
64.7
53.5
78.2
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care): 57.3 56.3 53.1
66.3 59.0 64.7 70.1 64.7 53.5 78.2. Assume that the population of x
values has an approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care):
57.4
55.8
53.3
65.9
59.0
64.7
70.1
64.7
53.5
78.2
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care):
57
56.4
53.1
66.4
59.0
64.7
70.1
64.7
53.5
78.2
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care):
57.2
55.8
52.7
66.2
59.0
64.7
70.1
64.7
53.5
78.2
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

What percentage of hospitals provide at least some charity care?
Based on a random sample of hospital reports from eastern states,
the following information is obtained (units in percentage of
hospitals providing at least some charity care):
56.5
56.1
53.3
66.4
59.0
64.7
70.1
64.7
53.5
78.2
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean percentage x and the sample...

How much do wild mountain lions weigh? Adult wild mountain lions
(18 months or older) captured and released for the first time in
the San Andres Mountains gave the following weights (pounds):
71
104
126
121
60
64
Assume that the population of x values has an
approximately normal distribution.
(a) Use a calculator with mean and sample standard deviation
keys to find the sample mean weight x and sample standard
deviation s. (Round your answers to one decimal
place.)...

A
random sample of 5697 physicians in Colorado showed that 2927
provided at least some charity care.
(b) Find a 99% confidence interval for p.
lower limit-
upper limit-

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
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