Answer:
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B)30
C)40
D)120
Thursday: 2 choices {museum, park}
Friday: 4 choices {shopping, jet ski, hiking, and the choice not chosen for Thu}
Saturday: 1 choice {food}
Sunday: 3 choices {the remaining 3 after Friday's choice}
The total number of ways these choices can be arranged is 2×4×1×3 = 24
The apprpropriate selection is A) 24.
Answer:
5 & 60
Step-by-step explanation:
s * 12 = g
s + 55 = g
12s = s + 55
11s = 55
s = 5
How do you factor this
Answer:
$30
Step-by-step explanation:
$240 divided by 8
She earns $30 each day
The terms of an expression 4x² – 3xy are:
(a) 4x and -3xy (b) 4x² and 3xy
(c) 4x² and -xy
(d) x
Answer:
(b) 4x² and 3xy
Step-by-step explanation:
The terms of an expression 4x² – 3xy are:
The terms are the factors of the expression, which are 4x² and -3xy. The signal is not counted as a term. So the correct answer is given by option b.
We are certain that 95% of the days in the months of August and July will have a temperature at 2:00 PM between 71.28 and 75.48.
2)
We cannot determine the proper interpretation of this interval.
3)
We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM for the days recorded is between 71.28 and 75.48.
4)
We are 95% confident that the proportion of all days' temperatures will fall between 71.28 and 75.48.
5)
We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM is between 71.28 and 75.48.
Answer:
So on this case the 95% confidence interval would be given by (71.65;75.11)
The interval given for this case by the problem is:
(71.28, 75.48)
And the best conclusion is given by:
4) We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM is between 71.28 and 75.48.
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the sample mean
population mean (variable of interest)
represent the sample standard deviation
n=15 represent the sample size
95% confidence interval
The confidence interval for the mean is given by the following formula:
(1)
The degrees of freedom are given:
Since the Confidence is 0.95 or 95%, the value of and , and we can use excel, a calculator or a tabele to find the critical value. The excel command would be: "=-T.INV(0.05,14)".And we see that
Now we have everything in order to replace into formula (1):
So on this case the 95% confidence interval would be given by (71.65;75.11)
The interval given for this case by the problem is:
(71.28, 75.48)
And the best conclusion is given by:
4) We are 95% confident that the average daily temperature for the months of July and August at 2:00 PM is between 71.28 and 75.48.