Questions
The following graph represents the results of a survey, in which a random sample of adults in a certain country was asked if a certain action was morally wrong in general.

The following graph represents the results of a survey, in which a random sample of adults in a certain country was asked if a certain action was morally wrong in general. Complete parts (a) through (c).

(a) What % of the respondents believe that the action is morally acceptable? (round to nearest whole number as needed)

(b) If there are 217 adults million adults in the country, how many believe that the action is morally wrong? (round to nearest million as needed)

(c) If a polling organization claimed that the results of the survey indicate that 9% of adults believe that the action is acceptable in certain situations, would you say this statement is descriptive or inferential? Why?

 

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in a relative frequency distribution, what should the relative frequencies add up to?

in a relative frequency distribution, what should the relative frequencies add up to?

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About what proportion of college women are between 65 and 67 inches tall?

Heights of college women have a distribution that can be approximated by a normal curve with a mean of 65 inches and a standard deviation equal to 3 inches. About what proportion of college women are between 65 and 67 inches tall?

  • A. 0.17
  • B. 0.50
  • C. 0.25
  • D. 0.75

In: Statistics and Probability

Mr. Smith had 4 daughters each daughter had 4 brothers

Mr. Smith had four daughters, each daughter have four brothers how many Kids did Mr. Smith have?

 

In: Statistics and Probability

Pulse rates of women are normally distributed with a mean of 77.5

Pulse rates of women are normally distributed with a mean of 77.5 beats per minute and a standard deviation of 11.6 beats per minute. Answer the following questions.

What are the values of the mean and standard deviation after converting all pulse rates of women to z scores using \(\mathrm{z}=\frac{(\mathrm{x}-\mu)}{\sigma}\) ?

The original pulse rates are measure with units of "beats per minute". What are the units of the corresponding z scores? Choose the correct choice below.

  • The z scores are measured with units of "beats per minute".
  • The z scores are measured with units of "minutes per beat".
  • The z scores are measured with units of "beats."
  • The z scores are numbers without units of measurement.

In: Statistics and Probability

For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of scores that are

For bone density scores that are normally distributed with a mean of 0 and a standard deviation of​ 1, find the percentage of scores that are

a. significantly high​ (or at least 2 standard deviations above the​ mean).

b. significantly low​ (or at least 2 standard deviations below the​ mean).

c. not significant​ (or less than 2 standard deviations away from the​ mean).

In: Statistics and Probability

Find the indicated area under the curve of the standard normal distribution, then convert it to a percentage and fill in the blank.

Find the indicated area under the curve of the standard normal distribution, then convert it to a percentage and fill in the blank.

About _____% of the area is between z=?2.2 and z=2.2 (or within 2.2 standard deviations of the mean).

About?____% of the area is between z=?2.2 and z=2.2 (or within 2.2 standard deviations of the mean).

(Round to two decimal places as needed.)?

In: Statistics and Probability

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1.

Assume that a randomly selected subject is given a bone density test. Those test scores are normally distributed with a mean of 0 and a standard deviation of 1. Find the probability that a given score is less than -1.82 and draw a sketch of the region.

Assume the readings on thermometers are normally distributed with a mean of 0degrees C and a standard deviation of 1.00degrees C. Find the probability that a randomly selected thermometer reads greater than -1.11 and draw a sketch of the region.

If you could explain how to use the normal distribution table that would be great.

In: Statistics and Probability

Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1.

a) Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1.

b) Find the area of the shaded region. The graph depicts the standard normal distribution of bone density scores with mean 0 and standard deviation 1.

 

In: Statistics and Probability

A sampling distribution refers to the distribution of:

A sampling distribution refers to the distribution of:

  • repeated populations
  • repeated samples
  • a sample statistic
  • a population parameter

In: Statistics and Probability

Multiple-choice questions each have five possible answers (a, b, c, d, e)​, one of which is correct

Multiple-choice questions each have five possible answers (a, b, c, d, e)​, one of which is correct. Assume that you guess the answers to three such questions.

a. Use the multiplication rule to find​ P(CCW), where C denotes a correct answer, and W denotes a wrong answer.

In: Statistics and Probability

Determine whether the distribution is a discrete probability distribution. If not, state why.

Determine whether the distribution is a discrete probability distribution. If not, state why.

x

P(x)

0

0.1

1

0.5

2

0.05

3

0.25

4

0.1

In: Statistics and Probability

Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1

1) Find the indicated z score. The graph depicts the standard normal distribution with mean 0 and standard deviation 1 (0.9616)

2) Find the area of the shaded region. The graph depicts the standard normal distribution with mean 0 and standard deviation 1. The shaded area is z=0.98 to the left.

In: Statistics and Probability