Download Suppose that as a military psychologist you know that the population

1. Suppose that as a military psychologist you know that the population of sonar operators
has a mean identification rat of 82 targets out of 100. You have just developed a new
sonar training system that, you claim, will increase the number of targets correctly
identified. Using the data from the 15 trainees listed below conduct a single sample t test
to determine whether they perform significantly better than the population of sonar
operators trained using the traditional method.
Number of targets correctly identified
88
79
92
87
82
91
85
82
89
94
86
91
80
77
83
2. The scores obtained from the 6 students on an IQ test at Thorndyke University were as follows:
i. X
Person 1: 110
Person 2: 118
Person 3: 110
Person 4: 122
Person 5: 110
Person 6: 150
On average, do the population of undergraduates at Thorndike University have higher
than average intelligence scores (IQ  100)?
3. A researcher claims that the average height of a woman aged 20 years or older is greater than
the 1994 mean height of 63.7 inches, on the basis of data obtained from the Centers for Disease
Control and Prevention’s Advance Data Report, No. 347. She obtains a random sample of 45
women and finds the sample mean height to be 63.9 inches with standard deviation of 3.5
inches. Test the researcher’s claim at using a 0.05 level of significance.
4. The manufacturer of a certain type of ATM machine reports that the mean ATM withdrawal is
$60. The manager of a convenience store with an ATM machine thinks that the mean withdrawal
is less than this amount. He obtains a simple random sample of 35 withdrawals over the past
year and finds the sample mean to be $52 with a standard deviation of $13.