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Z-score help

Your friend Zoey has a height with a z-score of -1.51. Will she qualify to work at the fire department. If the Standard dev. is 3.1 and Mean is 5ft 4 inches.

A man gets an invoice for \$430 with terms 2/10, 1/15,n/30. How much would he pay 8 days after the invoice date? The net amount due is ?

The net amount of \$430 with terms of 2/10, 1/15, n/30. How much is paid in 8 days

Association between midterm and final exam scores are linear.  The summary is midterm: mean=75, Standard deviation =10. Final: Mean =75, Standard deviation = 10. The correlation is 0.7. According...

What do you do to figure this problem?

If females of a certain species of lizard always mate with males that are 0.75 years younger than they are, what would the correlation between the ages of these male and female lizards be?  I'm...

I am getting the wrong answer for this simple problem and I don't know what I'm doing wrong.

Determine the correlation between the height and weight of 21 year old males.  If I measured the height and weight of two 21 year old men.    Male #1  Height 70, Weight 160       ...

statistics

Tell if each variable is continuous or discrete. a. Tonnage carried by an oil tanker at sea. b. Wind velocity at 7 o’clock this morning. c. Number of text messages you received yesterday...

statistics

Which data type (categorical, numerical) is each of the following and what is its level of measurement (nominal, ordinal, interval, ratio)? a. Your current credit card balance. b. Your...

statistics

Which data would be most suitable for a pie chart? Why not the others? a. Presidential vote in the last election by party (Democratic, Republican, Other). b. Retail prices of six major...

statistics

Which statement is false? Explain. a. Sampling error can be reduced by using appropriate data coding. b. Selection bias means that respondents are not typical of the target population...

statistics

Which statement is correct? Why not the others? a. Likert scales are interval if scale distances are meaningful. b. Cross-sectional data are measured over time. c. A census is always...

Which one of the following is true? Why not the others? a. Histograms are useful for visualizing correlations. b. Pyramid charts are generally preferred to bar

Which one of the following is true? Why not the others? a. Histograms are useful for visualizing correlations. b. Pyramid charts are generally preferred to bar charts. c. A correlation...

Which of the following is not a reason for sampling? Explain. a. The destructive nature of some tests. b. High cost of studying the entire population. c. The

Which of the following is not a reason for sampling? Explain. a. The destructive nature of some tests. b. High cost of studying the entire population. c. The expense of obtaining...

To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience, snowball, etc.)

To choose a sample of 12 students from a statistics class of 36 students, which type of sample (simple random, systematic, cluster, convenience, snowball, etc.) is each of these? a. Picking...

The CFDC says 1 in 88 kids are affected by BSD or A. A school says out of 300 stdnts , 7 are documented as having BSD.

Why can you consider this a binomial experiment?   In a school this size, how many students would we expect to have BSD?

statistics question

Driving without a seat belt is not risky. I’ve done it for 25 years without an accident.” This best illustrates which fallacy?   a. Unconscious bias. b. Conclusion...

Probability of having 4 randomly selected calculators being defective out of 69. in which 43 are defective and 26 are good.

I have a sample of 4 calculators out of a group of 69, 43 are defective and 26 have no defects what is the probability of all 4 of the randomly selected calculators being defective?    I...

1. Consider n pairs of observations (Xi ,Yi ),i =1,...,n. If we want to fit the model, Y =2 +ß.X^2 + ?. find the least squares estimator for ß .

This question could be asking us to do regression, but I do not really know. IT requires us to use the least square estimator.

Percentage

The distribution of cholesterol levels in teenage boys is approximately normal with μ = 170 and σ = 30 (Source: U.S. National Center for Health Statistics). Levels above 200 warrant attention. What...

Probablity

The distribution of cholesterol levels in teenage boys is approximately normal with μ = 170 and σ = 30 (Source: U.S. National Center for Health Statistics). Levels above 200 warrant attention. Find...

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