When a sample size is greater than 10, the standard deviation of the sample is an accurate predictor of the population standard deviation. A. True B. False

Answers

Answer 1

Answer:

Answer:

false because 40 is still very very small

Step-by-step explanation:

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A set of data with a mean of 53 and a standard deviation of 2.3 is normally distributed. Find the values that are 3 standard deviations from the mean.

The bacteria in a petri dish culture are self duplicat

Answers

Answer:

Yes, the bacteria in the Petri dish culture *are* duplicating.

Step-by-step explanation:

Convert 0.49494949 into a fraction. Show all work.

Answers

Answer:

0.4949

49 this is a fraction

Step-by-step explanation:

Let

XXX

0.49

¯¯¯¯

then

XXX

100

49.49

¯¯¯¯

and

XXX

100

−

XXX

The ratio of the interior angle of a regular polygon to the exterior angle is 13:2 . How many sides does it have?

Answers

Answer:

Step-by-step explanation:

Int angle : Ext angle : Total

13 : 2 : 15 (13+2)

We know that, int angle + ext angle = 180

Let's introduce a variable x to help solve this ratio

Our ratio is now - 13 x : 2 x : 15x

Use your total ratio and equate it to your total angle size

15 x = 180

x = 180 / 15 = 12

So,

Int angle = 13 x = 13 (12) = 156

Ext angle = 2 x = 2 × 12 = 24

Now, use this formula.

Ext angle = 360 / n

(n represents your number of sides)

24 = 360 / n

n = 360 / 24 = 15

Suppose the results indicate that the null hypothesis should be rejected; thus, it is possible that a type I error has been committed. Given the type of error made in this situation, what could researchers do to reduce the risk of this error? Increase the sample size. Choose a 0.01 significance level instead of a 0.05 significance level.

Answers

Answer:

You need to Choose a 0.01 significance level , instead of 0.05 significance level.

Step-by-step explanation:

Consider the provided information.

It is given that type I error has been committed.

Type I error occur, if we rejected the null hypothesis even null hypothesis is true.

We reject the null hypothesis if p-value < α

Accept the null hypothesis if p-value ≥ α

According to given condition the value of α is 0.05 that means 95% chance that your assumption is correct and 5% chance that assumption is wrong.

In order to reduce the risk of this error you need to increase the significance level so that the value of α becomes lower than the p value.

lower α means you will be less likely to detect a true difference if one really exists.

Hence, you need to Choose a 0.01 significance level , instead of 0.05 significance level.

Please solve needed asap

Answers

Answer:

x = 56°

Step-by-step explanation:

Base angles of an isosceles triangle are equal.

This:

The angle of the triangle to our right, which is the third unequal angle = 180 - 2(31)

= 180 - 62

= 118°

The base angle of the triangle to our left = 180 - 118 (angles on a straight line)

= 62°

x = 180 - 2(62)

x = 180 - 124

x = 56°

A vehicle designed to operate on a drag strip accelerates from zero to 30m/s while undergoing a straight line path displacement of 45m. What is the vehicle's acceleration if its value may b assumed to be constant? A.2.0m/s
B.5.0m/s
C.10m/s
D.15m/s

Answers

The vehicle's acceleration if its value may b assumed to be constant is 10 m/s. Therefore, option C is the correct answer.

Given that, a vehicle designed to operate on a drag strip accelerates from zero to 30m/s while undergoing a straight line path displacement of 45m.

What is an acceleration?

Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction-or change both.

Here, Δx = 45 m, v₀ = 0 m/s and v = 30 m/s

Using the formula v² = v₀² + 2aΔx

(30 m/s)² = (0 m/s)² + 2b (45 m)

b = 10 m/s

The vehicle's acceleration if its value may b assumed to be constant is 10 m/s. Therefore, option C is the correct answer.

Learn more about the acceleration here:

brainly.com/question/12550364.

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Answer:

C. 10 m/s²

Step-by-step explanation:

Given: