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horsena [70]
3 years ago
15

Left ventricular mass (LVM), determined from echocardiograms, is an important risk factor for subsequent cardiovascular disease.

The researchers are interested in assessing whether LVM changes in children over a 4-year period. To help plan the main study, a pilot study is conducted where echocardiograms are obtained from 10 random children from the Bogalusa Heart Study at baseline and after 4 years of follow-up. The sample mean of LVM change over the 4-year study period is 18.9 g and the sample standard deviation is 26.4 g. For answering the questions (a) and (b) below, assume that the sample variance of LVM change in this pilot study is the true variance of LVM change in the population.(a). If the expected increase in LVM is 10 g, what is the power of such a study if a two-sided test is to be used with α = 0.05? (b). Since this is a pilot study, the main question of interest is how many subjects would be needed to detect an increase of 10 g in mean LVM over 4 years using a two-sided test with α = 0.05 and power = 80%? Suppose the researchers also want to get an idea of the true population variance σ 2 of LVM change in children over a 4-year period based on the pilot data. (c). Perform a hypothesis test to assess whether σ 2 is significantly different from 300. Use both critical-value and p-value methods. (d). Find a 95% confidence interval (CI) of σ 2 . Is the result consistent with that of (c)? Justify your answer.
Business
1 answer:
polet [3.4K]3 years ago
7 0

Answer:

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Having a specialized, embedded HR unit is beneficial to each, specific unit, as  HR would cater to every department and its special needs. On the contrary, centralized HR tends to give inconsistent help, as they always assign a different person or team when a problem arises.

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3 years ago
A firm has current liabilities of $500, a current ratio of 1.5, and a quick ratio of 1.1. calculate the level of inventory for t
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The inventory level will be used by an inventory manager to regulate the optimal time for manufacturing, if they are handling a manufacturer's warehouse, or to demand more if the product is being stored as stock at a store.


To solve this:

Get first the Current Assets this solved by multiplying the current liabilities to the current ratio.

CA = $500 (1.5) = $750


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Inventory level = $750 (500 x 1.1) = $412,500

4 0
3 years ago
Scoop Masters Inc. has been charged by Fab Flavors Corp. with stealing Fab Flavors' patented process for making ice cream. After
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Answer:

No - FALSE

Explanation:

Scoop Masters Inc. has been charged by Fab Flavors Corp. with stealing Fab Flavors' patented process for making ice cream. After the papers are filed, Scoop Masters begins shredding all documents pertaining to its ice cream-making process. Since no motion has been made requesting production of documents, Scoop Masters has done nothing wrong is a false statement. Scoop Masters Inc. has done really wrong. They have stolen someone else's idea of making a product even without their consent and then without mentioning their name and rights and trademarks. Moreover, they shredded all the proof in order not to be caught by the court in law. They have some serious crime which is totally wrong and unacceptable in all cases at all grounds.

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<u><em>Direct marketing.</em></u>

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Direct marketing works as a set of strategies whose objective is to promote the promotion of a company's products and services through direct contact with its potential audience.

It is a user-friendly strategy that translates into positive results for maintaining business / consumer interactions, creating brand satisfaction and value. Some examples of direct marketing are: telemarketing, telesales, direct mail, email marketing and others.

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3 years ago
Someone who is a natural leader exhibits this Learning Pattern
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