Sol
1 answer:
Answer:
Restaurant can purchase 6 adds when it want to spent total of $3600 and price of each add = $600.
Step-by-step explanation:
Given:
Amount restaurant can spend on advertising =$3600
Cost of 1 add = $600
To find:
Number of ads restaurant will be able to purchase. =?
Solution:
Number of adds restaurant can purchase=6 adds
Hence restaurant can purcahse 6 adds when it want to spent total of $3600 and price of each add = $600.
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78×4000=312000
100×x=100x
312000÷100=3120
3120+4000=7120<----2nd month
7120×0.5=3560<----3rd month
4000<----1st month
4000+3560+7120=14680<----Your answer, this is the total of the three months.
Answer:
The test is left - tailed
We cannot reject the organization's claim ( its cheapest screens will truly last less than 2.8 years)
Step-by-step explanation:
Sample size, n = 61
Sample mean,
Standard deviation,
Significance level, α=0.02
Null hypothesis,
Alternative hypothesis,
It is clearly seen from the alternative hypothesis, that it is a left tailed test. It is not tailed towards the two directions.
Calculate the test statistic:
Calculate the P-value:
P(Z < -3.35) = 0.0002
Since (p-value = 0.0002) < (α=0.02), the null hypothesis is rejected.
It can therefore be concluded that the mean of the cheapest screen is less than 2.8 years. i.e. the cheapest screen will last less than 2.8 years