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kondaur [170]
3 years ago
8

g Which of the following is not appropriate to use the t-confidence interval for . a. The sample is based on a simple random sam

ple (SRS). b. The sample size is greater than 30. c. The variable has a Normal distribution. d. The population standard deviation, , is known.
Mathematics
1 answer:
KATRIN_1 [288]3 years ago
7 0

Answer:

d. The population standard deviation is known.

Step-by-step explanation:

T-distribution or Z-distribution, which to use?

If we have the population standard deviation is known, we use the z-distribution.

Otherwise, if we only have the standard deviation for the sample, we use the t-distribution.

Which of the following is not appropriate to use the t-confidence interval for

When the population standard deviation is known, so letter d.

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a circle with a circumference of 6 has an arc with a 20 degree central angle.What is the length of the arc
alex41 [277]

Answer:

2.094395 ft

Step-by-step explanation:

7 0
3 years ago
Write L if it is likely to happen and U if unlikely to happen.
maria [59]

Answer:

Probabilities

        Likely to happen (L)      Unlikely to happen (U)

a.      4/5                                 5/8

b.     3/5                                  3/8

c.     4/5                                  4/7

d.    0.3                                  0.09

e.    5/6 and 4/5                   2/3

Step-by-step explanation:

Probabilities in Percentages:

a. The probability of 4/5 = 80% and 5/8 = 62.5%

b. The probability of 3/8 = 37.5% and 3/5 = 60%

c. The probability of 4/5 = 80% and 4/7 = 57%

d. The probability of 0.3 = 30% and 0.09 = 9%

e. The probability of 2/3 = 67% and 4/5 = 80% and 5/6 = 83%

b) To determine the relative values of the fractional probabilities, it is best to reduce them to their fractional or percentage terms.  When this is done, the relative sizes become obvious, and then, comparisons can be made.

3 0
3 years ago
You need at least $635 to go on a trip to Washington, DC. You already have $75 saved for the trip. You decide to save an additio
Reika [66]

Answer: $75 + $65w ≥ $635

Step-by-step explanation:

$635 is your goal and how much money you should earn

$75 is your already saved money

$65 is how much you're going to save every week

Ask yourself, how many weeks do you have to save money before you reach your goal of $635. Since we don't know this value, it's a variable, w.

4 0
3 years ago
HELP PLEASE ASAP
Vladimir79 [104]

By using dimensional analysis, this problem can be simple.


100cm * \frac{1m}{100cm} = 1m

B

4 0
3 years ago
Solve the equation for b: -4b + 18 = -6
insens350 [35]
The answer is 6:

6+18= 24
24 divided by 4= 6

b=6
4 0
3 years ago
Read 2 more answers
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