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FrozenT [24]
3 years ago
7

You are conducting a left-tailed test of a claim about a population mean when sigma is unknown with a sample size of 7.

Mathematics
1 answer:
Artyom0805 [142]3 years ago
4 0
<h3>Answer:  -3.71</h3>

========================================================

Explanation:

You'll need to use a T table to answer this question. Your stats textbook should have such a table in the back appendix section.

If your textbook doesn't have the proper table, or you don't have your textbook with you, then I recommend searching online for "t table" and you should have tons of free options to choose from.

In the table you'll look for the degrees of freedom row 6, since the degrees of freedom are equal to n-1. In this case, n = 7.

In this row, locate the column labeled  "alpha = 0.005" and you'll be looking at "one tail". The value in this row and column is roughly 3.707

Since we're doing a left tailed test and we want P(t < C) = 0.005, where C is the critical value we're after. This must mean C < 0. So C = -3.707 approximately. Round this to two decimal places and we end up with -3.71

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Each letter of the word "supercalifragilisticexpialidocious" is placed into a bag and drawn at 3 times, replacing the letter aft
Makovka662 [10]

Answer:

P(X ≥ 1) = 0.50

Step-by-step explanation:

Given that:

The word "supercalifragilisticexpialidocious" has 34 letters in which 'i' appears 7 times in the word.

Then; the probability of success = 7/34 = 0.20588

Using Binomial distribution to determine the probability; we have:

P(X = x)  = ^nC_x  \ \beta^x   \  (1 - \beta)^{n-x}

where;

x = 0,1,2,...n    and    0  <  β   <   1

and x represents the  number of successes.

However; since the letter is drawn thrice; the probability that the letter "i" is drawn at least once can be computed as:

P(X ≥ 1) = 1 - P(X< 1)

P(X ≥ 1) = 1 - P(X =0)

P(X \ge 1) =  1 - \bigg [ {^3C__0} (0.21)^0 (1-0.21)^{3-0} \bigg]

P(X \ge 1) =  1 - \bigg [ 1 \times 1 (0.79)^{3} \bigg]

P(X ≥ 1) = 1 - 0.50

P(X ≥ 1) = 0.50

4 0
3 years ago
The difference of 15 and x is 12
gulaghasi [49]

Answer:

X is 3

Step-by-step explanation:

15-x=12

X=15-12

X=3

8 0
2 years ago
Please help by looking at the picture, thanks!
Ad libitum [116K]

Answer:

I also got 616, what is the answer??

Step-by-step explanation:

6 0
2 years ago
.25% written as a fraction and decimal
Genrish500 [490]

Answer:

1/4 in fraction form, and 0.25 in decimal form.

Step-by-step explanation:

3 0
3 years ago
If Soda costs 1.89 per gallon. If each of the eight members of the hockey team drinks 0.75 gallons of soda each week how much mo
evablogger [386]
6(n + 12) = 40 Should be the right answer


5 0
3 years ago
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