Type of employment, indicator for chronic illness, drug, or alcohol use these variables are likely useful to add to the regression to control for important omitted variables.
What is sleep pattern?
The word sleep pattern, commonly referred to as a sleep-wake pattern, refers to a person's schedule for going to bed and getting up as well as their napping habits. The frequency and length of sleep disruptions may also be part of the sleep pattern.
Type of employment, Chronic illness and drug/alcohol use they ought to be included in regression since they disturb sleep patterns.
As a result, option (a) Type of employment. (b) Indicator for chronic illness. (c) Drug or alcohol use is correct.
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The correct answer would be, The Law of Demand.
Prices are much higher than formerly. Siemienas says, 'Yes my prices are high, if nobody buys, i bring my prices down. This is the market rule'. This rule best describes The Law of Demand. 
Explanation:
In the field of economics, there are two basic concepts of Demand and Supply. 
According to The Law of Demand, When the price of the good or service increases, the demand for that product or service decreases, and if price of the good or service decreases, the demand for that product or service increases, keeping all other factors constant. 
So this is what Siemienas says that if the demand for his product will decrease, he will decrease the price of the product in order to maintain the sales of his company. 
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Answer:
Noise 
Explanation:
In advertising, "noise" is something that distracts from your message. The beaches are noise because Sabrina feels that they distract from showing the makeup products. 
 
        
             
        
        
        
Answer:
Net realizable value of Accounts Receivable is  $4,580
Explanation:
Balance in allowance for uncollectible account= Balance before write off - Account written off
=$420 - $140
=$280
Net realizable value of accounts receivable is:
Particular                                                Amount
Accounts Receivable balance               $5000
Less: Account written off                         <u>$140</u>
Balance after write off                             $4860
Less: Allowance for uncollectible           
account from step 1                                  <u>$280</u>
Net realizable value                                <u>$4,580</u>