Find df for determining mean weight of adult women

Assignment Help Basic Statistics

Reference no: EM13124044

A researcher believes that women today weigh less than in previous years. To investigate this belief, she randomly samples 41 adult women and records their weights. The scores have a mean of 111 lbs. and a standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs.

The df for determining tcrit =

A. 41
B. 40
C. 39
D. need more info

Reference no: EM13124044

Questions Cloud

What is the boiling point of a solution : What is the boiling point of a solution made by adding 6.79 g of magnesium chloride to 242.0 g of water?

Declining-balance method of depreciation : A company that changes from the declining-balance method of depreciation for previously recorded assets to the straight-line method should report the change as a(n)

Illustrate what is great lake effective tax rate : Net nonoperating expense before tax of $53,828 thousand. Great Lakes statutory tax rate for 2010 is 35%. Illustrate what is Great Lake’s effective tax rate?

Determine the cost recovery deductions for the streetlights : Submit a tax file memorandum with proper citations of all sources: I want to see citations of the court case, a revenue procedure, and a specific section of the IRC.

Find df for determining mean weight of adult women : A standard deviation of 12.4. A local census taken several years ago shows the mean weight of adult women was 115 lbs. The df for determining tcrit

Explain linear fractional transformation : Linear Fractional Transformation, Consider the transformation w = (i - z) / (i + z). The upper half plane Im z > 0 maps to the disk |w|

Net income or loss under discontinued operations : Ignoring income taxes, what amount should be reported in the 2010 income statement as the net income or loss under 'discontinued operations' ?

Orthogonal linear transformation : Let alpha = {x_1, x_2, ..., x_n} be an arbitrary orthonormal basis for V. Prove that T is orthogonal iff [T]_alphaalpha is an orthogonal matrix.

Write a goal equation that represents the fluctuations : Write a goal equation that represents the fluctuations in the production level from May to June, June to July, and July to August.

User Account

All Pages