What is the value of –|–9 + x| – 24 when x = –5? A)18 B)-18 C)38 D)-38

A sample of 66 obese adults was put on a low-carb diet for a year. The average weight loss was 11 pounds and the standard deviat

Illusion [34]

Answer:

The 99% lower confidence bound for the true average weight loss is 3.98 pounds.

This means that we can be 99% sure that the mean weight loss for all obese adults on a low-carb diet is positive.

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.99}{2} = 0.005$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.005 = 0.995$ , so $z = 2.575$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

$M = 2.575*\frac{19}{\sqrt{66}} = 6.02$

The lower end of the interval is the sample mean subtracted by M. So it is 11 - 6.02 = 3.98 pounds

The 99% lower confidence bound for the true average weight loss is 3.98 pounds.

This means that we can be 99% sure that the mean weight loss for all obese adults on a low-carb diet is positive.

7 0

2 years ago

Read 2 more answers

At what at speed was jo walking for the first 30 minutes?

Aleksandr [31]

Answer:

6 km/hr

rested 10 minutes

Step-by-step explanation:

3 km/0ne half hour = 6 km/hr

5 0

2 years ago

A cookie recipe that yields 48 cookies calls for 2 cups of flour. a different cookie recipe that yields sixty cookies calls for

Serhud [2]

48 cookies from 2 cups of flour, rate = 48 cookies / 2 cups = 24 cookies / cup

60 cookies from 3 cups of flour, rate = 60 cookies / 3 cups = 20 cookies / cup

If the rates were proportional, the rates would have the same answers.

Therefore the rates are not proportional.

6 0

3 years ago

Wires manufactured for use in a computer system are specified to have resistances between .12 and .14 ohms. The actual measured

White raven [17]

Answer: a) 0.9544996

b) 0.9999366

Step-by-step explanation:

Given : The actual measured resistances of wires produced by company A have a normal probability distribution with mean $\mu=0.13$ ohm and standard deviation $s=0.005$ ohm.