1A social psychologist interested in relationships has developed a scale that measures the degree of affection adult men feel for their father. She found that the general population distribution is skewed to the right, the mean degree of affection is 70, and the standard deviation is 10. She is now wondering if men who grew up with divorced parents will score lower on the scale than men who grew up in a home with both parents. She samples a group of 100 men from divorced families and finds that their mean is 59. What is the shape of the comparison distribution?

Group of answer choices

Skewed to the left

Skewed to the right

Very close to a normal distribution

It cannot be determined from the information given

2Typically, a symmetrical shape can be expected from:

Group of answer choices

Positively skewed data

Negatively skewed data

A distribution of sample means

3.A researcher is interested in how affectionate pet owners are. She found that the general population distribution is skewed to the right, the mean degree of affection is 85, and the standard deviation is 18. She was then interested in finding out whether cat owners are less affectionate than other pet owners. She samples a group of 100 cat owners and finds that their mean is 52.5. What is the research hypothesis?

Group of answer choices

Cat owners are less affectionate than other pet owners

The sample size will significantly affect the level of affection

The sample size will significantly affect the level of affection

There will be no significant differences between the two populations

4.In general, which of the following is an effect of decreasing the number of scores in a sample?

Group of answer choices

The distribution of sample means will become more positively skewed

The distribution of sample means will look more like a normal curve

The distribution of sample means will look less like a normal curve

The distribution of sample means will become more negatively skewed

5. ( FILL IN BLANK) For the following problem, please round to two decimal places:

A psychology professor of a very large class wanted to know whether students who turned in their tests first had different scores than the overall mean on the test. The overall mean score on the test was 85.6 with a standard deviation of 14.14; the scores were approximately normally distributed. The mean score for the first 81 tests was 79.89. Evaluate the researcher's hypothesis using a 5% significance level. When you transform the sample mean into a Z score, what is the value of Z? _________

6.Which of the following is false?

Group of answer choices

The mean of the distribution of means equals the population mean

As sample size increases, standard deviation of the distribution of means decreases

As sample size decreases, standard deviation of the distribution of means increases

The mean of the distribution of means is greater than the population mean

7.The distribution of scores from which the samples are taken is:

Group of answer choices

Less spread out than the distribution of all possible sample means

More spread out than the distribution of all possible sample means

Always rectangular in shape

Equally spread out as the distribution of all possible sample means

8.Which of the following is true?

Group of answer choices

The variance of the distribution of all possible sample means is equal to the square of the population standard deviation

The variance of the distribution of all possible sample means is equal to the standard deviation of the distribution of means squared

The variation of the distribution of all possible sample means is equal to the square of the sample standard deviation

9.The mean of the population is:

Group of answer choices

Larger than the mean of the distribution of means

Not equal to the mean of the distribution of means

Equal to the mean of the distribution of means

Smaller than the mean of the distribution of means

10.A social psychologist interested in relationships has developed a scale that measures the degree of affection adult men feel for their father. She found that for the general population the distribution is skewed to the right, the mean degree of affection is 70, and the standard deviation is 10. She now is wondering if men who have themselves just become new fathers will score higher on the scale than men in general. She samples a group of 100 new fathers and finds that their mean is 65. What is the shape of the comparison distribution?

Group of answer choices

Skewed to the right

Skewed to the left

Approximately normal

It cannot be determined from the information given

11.A psychology professor of a very large class wanted to know whether students who turned in their tests first had different scores than the overall mean on the test. The overall mean score on the test was 85 with a standard deviation of 14; the scores were approximately normally distributed. The mean score for the first 25 tests was 80. Which of the following is true?

Group of answer choices

The research hypothesis is that people that turn in their tests first will score lower than the overall mean on the test

The null hypothesis is that people that turn in their tests first will not score differently than the overall mean on the test

The research hypothesis is that people that turn in their tests first will not score differently from the overall mean on the test

The research hypothesis is that people that turn in their tests first will score higher than the overall mean on the test

12A psychology professor of a very large class wanted to know whether students who turned in their tests first had different scores than the overall mean on the test. The overall mean score on the test was 85 with a standard deviation of 14 the scores were approximately normally distributed. The mean score for the first 25 tests was 80. What is the correct cutoff score(s) if you use a 5% significance level?

Group of answer choices

-1.65

1.96

+1.96

+1.65

13 (FILL IN BLANK) For the following problem, please round to two decimal places:

A researcher is interested in how affectionate pet owners are. She found that the general population distribution is skewed to the right, the mean degree of affection is 80.2, and the standard deviation is 12.06. She was then interested in finding out whether cat owners are less affectionate than other pet owners. She samples a group of 100 cat owners and finds that their mean is 52.82. What is the standard deviation of the comparison distribution? _______________

14For the following problem, please round to two decimal places:

A researcher is interested in how affectionate pet owners are. She found that the general population distribution is skewed to the right, the mean degree of affection is 84.76, and the standard deviation is 17.98. She was then interested in finding out whether cat owners are less affectionate than other pet owners. She samples a group of 100 cat owners and finds that their mean is 51.24. What is the mean of the comparison distribution?

15 ( FILL IN BLANK) For the following problem, please round to two decimal places:

For a particular known population, = 8 and ² = 5. A researcher conducts a study in which 6 participants are given an experimental procedure. When testing the hypothesis that the population these 6 participants represent is different from the known population, the comparison distribution's variance would be_______