Which of the following statements about a normal distribution is true?

• A large portion of the data is located near the tails.
• A large portion of the data is skewed to the right.
• The normal distribution is single-peaked and symmetric.
• The normal distribution is an example of a bimodal distribution.

Which of the following data types will be continuous?

• The number of cars in 100 households
• The total weight of apples harvested in the farm in a season
• The letter gradesstudents received on a class quiz
• The number of children younger than ten that visited a planetarium last week

A factory manufactures motorcycles. One of its employees, working in the quality control department, checks the first 10 and the last 10 motorcycles manufactured in a day.

This is what type of sampling?

• Stratified sampling
• Systematic sampling
• Convenience sampling
• Voluntary response sampling

A market research company conducted a survey to find the level of affluence in a city. They defined the category "affluence" for peopleearning $100,000 or more annually.Out of 267 persons who replied to their survey, 32 are considered affluent.

What is the 95% confidence interval for this population proportion?Answer choices are rounded to the hundredths place.

• 0.08 to 0.34
• 0.24 to 0.34
• 0.08 to 0.16
• 0.16 to 0.24

Select the correct statement regarding experiments.

• A researcher can carefully control the explanatory variables but not observe human responses.
• A researcher can ignore explanatory variables and observe human responses.
• A researcher can carefully control the explanatory variables and observe human responses.
• A researcher can observe the explanatory variables but not control human responses.

Stevenmeasures the weight of a random sample of 49 basset hounds. The mean weight was 45.8 pounds, with a standard deviation of 3 pounds. Using the alternative hypothesis that < 45.8, Stevenfound a z test statistic of -1.5.

What is the p-value of the test statistic?Answer choices are rounded to the thousandths place.

0.055

0.067

0.134

0.147