1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
natali 33 [55]
2 years ago
14

An increase in walking has been shown to contribute to a healthier life-style. A sedentary American takes an average of 5000 ste

ps per day (and 65% of Americans are overweight). A group of health-conscious employees of a large health care system volunteered to wear pedometers for a month to record their steps. It was found that a random sample of 40 walkers took an average of 5430 steps per day, and the population standard deviation is 600 steps. At = 0.05 can it be concluded that they walked more than the mean number of 5000 steps per day?
Mathematics
1 answer:
Zielflug [23.3K]2 years ago
6 0

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

H0: µ = 5000

For the alternative hypothesis,

H1: µ > 5000

Since the population standard deviation is given, z score would be determined from the normal distribution table. The formula is

z = (x - µ)/(σ/√n)

Where

x = sample mean

µ = population mean

σ = population standard deviation

n = number of samples

From the information given,

µ = 5000

x = 5430

σ = 600

n = 40

z = (5430 - 5000)/(600/√40) = 4.53

Looking at the normal distribution table, the probability corresponding to the z score is < 0.0001

Since alpha, 0.05 > than the p value, then we would reject the null hypothesis. Therefore, at a 5% level of significance, it can be concluded that they walked more than the mean number of 5000 steps per day.

You might be interested in
3.) a + 40 = 0 What is the value of a?<br> a =
Rus_ich [418]

Answer:

a= -40

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Identify as indicating a linear function or quadratic function. f (x) = ax^2 + bx +c <br>​
NemiM [27]
I’m 99% sure It is a quadratic function
7 0
3 years ago
I need Help answering this Before 2pm today
Phoenix [80]
I think it’s (-10, -5) if your looking at the Xmin and Ymin
6 0
2 years ago
Evaluate the expression.<br><br> (13^2 - 12^2) ÷ 5​
otez555 [7]
Answer:

5

Step-by-step explanation:

(13^2 - 12^2) ÷ 5

(169 - 144) ÷ 5

25 ÷ 5

5
5 0
2 years ago
Please answer quickly!!!
mixas84 [53]

Answer:

Step-by-step explanation:

5x + 13y = 232

12x + 7y = 218

For each choice:

a) The first equation can be multiplied by –13 and the second equation by 7 to eliminate y. So we have

- 65x - 169y = - 3016

84x + 49y = 1526

Can not eliminate x and y.

b) The first equation can be multiplied by 7 and the second equation by 13 to eliminate y. So we have

35x  + 91 y = 1624

156x + 91y = 2834

Can not eliminate x and y if we ADD.

<em>(If we subtract, this is Yes)</em>

<em></em>

c) The first equation can be multiplied by –12 and the second equation by 5 to eliminate x.

-60x - 156y = - 2784

60x + 35y = 1090

The answer is YES

d) The first equation can be multiplied by 5 and the second equation by 12 to eliminate x.

25x + 65y = 1160

144x + 84y = 2616

Can not eliminate x and y

The final answer is C

3 0
3 years ago
Other questions:
  • Sales tax is calculated as a percentage of the sales price. If sales tax is 7%, what is the sales tax on clothing that costs $15
    14·1 answer
  • 50% of all the cakes jenny baked that week were party cakes, 1/5 were fruits cake and the remainder were sponge cake. what is th
    13·2 answers
  • If two number cubes are rolled at the same time what is the probability that the two cubes show different numbers?
    11·1 answer
  • Need answers for Question 8 and 9
    6·2 answers
  • Two students in Mrs. Johnson's preschool class are stacking blocks, one on top of the other. Sydney's blocks are 4 cm high, and
    15·1 answer
  • The product of x and 7
    6·2 answers
  • EXPERT HELP I'LL GIVE BRAINLIEST:<br><br><br> A or D
    10·2 answers
  • Molly scored 86, 87, 93, and x
    8·1 answer
  • Set A = 2,5, 6, 8, 11<br> Set B= 3, 4, 6, 9, 10, 12<br> What is the union of sets A and B?
    5·1 answer
  • A line passes through the point (-10, -6) and has a slope of 1/2 .
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!