Answer:
The correct Answer is 0.0571
Explanation:
53% of U.S. households have a PCs.
So, P(Having personal computer) = p = 0.53
Sample size(n) = 250
np(1-p) = 250 * 0.53 * (1 - 0.53) = 62.275 > 10
So, we can just estimate binomial distribution to normal distribution
Mean of proportion(p) = 0.53
Standard error of proportion(SE) = 
= 
= 0.0316
For x = 120, sample proportion(p) = 
= 
= 0.48
So, likelihood that fewer than 120 have a PC
= P(x < 120)
= P( p^ < 0.48 )
= P(z < 
) (z=
)
= P(z < -1.58)
= 0.0571 ( From normal table )
Answer:
MARKET PARTICIPATION.
Explanation:
<em>Because this way the firm size can stay constant or contract even if the company increases its revenues. Information technology helps firms contract in size because it can reduce transactions costs. According to the transaction cost theory, firms and individuals seek to economize on transaction costs, much as they do on prodcution costs. For instance, by using computer links to external suppliers, the Chrylser Corporation can achieve economies by obtaining more than 70 percent of its parts from other companies.</em>
Answer:
The account record comprises of Invoice roll up summary fields.
Explanation:
The possible reason that this change was not permitted was that the account record comprises of Invoice roll up summary fields.
Invoice roll up summary fields: A roll-up summary field computes values from associated records, for example those in a linked list. a person or someone ca design a roll-up summary field to show a value in a master record by building the values of fields in a particular record.
The detail record must be associated to the master through a master-detail relationship. for instance, you want to show the sum of invoice amounts for all linked custom object records in an account’s Invoices related list. you can show the whole or sum in a custom account field refereed to as Total Invoice Amount.
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