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timurjin [86]
3 years ago
15

Find the critical value of t for a sample size of 23 and a 99% confidence level. choose the correct value from below:

Mathematics
1 answer:
Kay [80]3 years ago
8 0
We can find critical value by using t - table.
For using t - table we need degree of freedom and alpha either for two tailed test or one tailed test.
We can determine degree of freedom by subtracting sample size from one.
So in given question sample size is 23. So we can say degree of freedom(df) for sample size 23 is
df = 23 - 1= 22
Now we have to go on row for degree of freedom 22.

After that we need to find alpha either for two tailed test or one tailedl test.
Confidence level is 99%. We can convert it into decimal as 0.99.

So alpha for two tailed test is 100 - 0.99 = 0.01

Alpha for one tailed test is 0.01/2 = 0.005.

So we will go on column for 0.01 for two tailed test alpha or 0.005 for one tailed test alpha.
 SO the critical value 22 degree of freedom and 0.01 two tailed alpha is 2.819 from t - table.

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hram777 [196]

Answer: 1.66375e+13

Step-by-step explanation:

7 0
3 years ago
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Phil's height is 51.2 cm, suzanne's height is 5'4", and suzanne's shadow lengthat gobblers knob is 76.2
8090 [49]

Answer:

P_1 = 24cm

Step-by-step explanation:

Represent:

Phil's height with P

Suzanne's height with S

Phil's shadow with P1

Suzanne's shadow with S1

So, we have:

P = 51.2cm

S = 5'4"

S_1 = 76.2cm

Required

Calculate the length of Phil's shadow --- Missing part of question

To do this, we make use of the following equivalent ratio.

P:S = P_1 : S_1

Convert S = 5'4" to cm

S = 5ft\ 4in

S = (5*30.48+ 4*2.54)cm

S = 162.56cm

Substitute values for P, S and S1

51.2cm : 162.56cm = P_1 : 76.2cm

Express as fraction

\frac{51.2cm}{162.56cm} = \frac{P_1 }{ 76.2cm}

Make P1 the subject

P_1 = 76.2cm * \frac{51.2cm}{162.56cm}

P_1 = 76.2cm * \frac{51.2}{162.56}

P_1 = \frac{76.2cm * 51.2}{162.56}

P_1 = \frac{3901.44cm}{162.56}

P_1 = 24cm

<em>Hence, the length of Phil's shadow is 24 cm</em>

6 0
2 years ago
a garrison of 60 soldiers had provisions for 45 days. if 15 more soldiers joined the garrison, for how long would the same provi
Eva8 [605]

Answer:

36 days.

Step-by-step explanation:

60 + 15 = 75 soldiers.

By proportion the number of days that the provisions will last

=  45 * (60/75)

=  45 * 4/5

= 36 days.

5 0
2 years ago
HELp PLeaSE ‼️‼️URGENT
Brums [2.3K]
I think it's B ( I might be wrong)
3 0
2 years ago
A high school basketball team score 70 or more points in 48% of its game. The team win 75% of the time when it scores 70 or more
wel

Answer:

49.52%

Step-by-step explanation:

To find the probability of the team winning a game, we just need to sum the probability of winning when it scores 70 or more points and the probability of winning when it scores less than 70 points.

The probability of scoring 70 or more points is 48%, so the probability of scoring less than 70 points is 100% - 48% = 52%

So the probability of scoring more than 70 points and win is 48% * 75% = 0.48 * 0.75 = 0.36

The probability of scoring less than 70 points and win the game is 52% * 26% = 0.52 * 0.26 = 0.1352

So the probability of winning the game is 0.36 + 0.1352 = 0.4952 = 49.52%

5 0
3 years ago
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