Question

The following data values are scores on a recent 250-point final given in one of my classes.

225 170 230 180 205 239 217 212 217 161 221 199 240 181 176 234 227 231 220 183 145 175 237 234 221 110 213 217 239 241

what percent of the values (to the nearest tenth of a percent) are within 1.8 standard deviation of the mean?

Answer #1

interval of 1.8 standard deviation of mean is

(206.667 -1.8 x 32.255, 206.667 + 1.8 x 32.255)

(148.608,264.726)

values within interval are

225 170 230 180 205 239 217 212 217 161 221 199 240 181 176 234 227 231 220 183 175 237 234 221 213 217 239 241

(28/30)*100

93.33%

please like ? ?

A local hospital collects monthly data on the number of
infections after surgeries. These data are shown below:
209
225
201
236
220
244
247
245
250
227
234
227
213
212
193
182
242
230
188
252
201
226
222
212
219
223
191
222
231
239
217
241
220
278
255
225
208
225
227
203
Determine the Interquartile Range

A local hospital collects monthly data on the number of
infections after surgeries. These data are shown below:
209
225
201
236
220
244
247
245
250
227
234
227
213
212
193
182
242
230
188
252
201
226
222
212
219
223
191
222
231
239
217
241
220
278
255
225
208
225
227
203
Determine the lower and upper quartiles.

A local hospital collects monthly data on the number of
infections after surgeries. These data are shown below:
209
225
201
236
220
244
247
245
250
227
234
227
213
212
193
182
242
230
188
252
201
226
222
212
219
223
191
222
231
239
217
241
220
278
255
225
208
225
227
203
Determine the sample median and sample mode

A survey on men and women’s shopping behavior collected data
from a sample of 50 men and 50 women. The following data on online
shopping spending every month.
Men
Women
148
272
211
176
256
251
309
235
190
145
205
179
203
30
208
135
231
200
125
270
149
174
205
123
195
199
178
195
196
192
198
102
110
110
199
184
181
228
168
316
218
170
222
234
206
163
168
245
239
174...

Refer to the accompanying data set of mean drive-through
service times at dinner in seconds at two fast food restaurants.
Construct a 95% confidence interval estimate of the mean
drive-through service time for Restaurant X at dinner; then do the
same for Restaurant Y. Compare the results.
Restaurant X
Restaurant Y
85
102
125
130
115
149
141
111
265
174
185
138
126
113
151
123
165
131
212
127
337
137
311
139
176
226
117
218
161...

Refer to the accompanying data set of mean drive-through
service times at dinner in seconds at two fast-food restaurants.
Construct a
95% confidence interval estimate of the mean drive-through
service time for Restaurant X at dinner; then do the same for
Restaurant Y. Compare the results.
Restaurant X
Restaurant Y
85
85
116
116
118
118
146
146
270
270
100
100
124
124
156
156
118
118
176
176
184
184
125
125
154
154
166
166
211
211...

Refer to the accompanying data set of mean drive-through service
times at dinner in seconds at two fast food restaurants. Construct
a 99% confidence interval estimate of the mean drive-through
service time for restaurant X at dinner then do the same for
restaurant Y
Restaurant X Restaurant Y
83 101
119 131
116 155
143 111
263 174
178 135
122 111
154 123
166 128
215 128
328 131
303 136
179 230
109 217
154 296
149 126...

Pat.#
Before
After
1
195
125
To the left is 2 datasets measured for
a sample of 107 patients with the high cholesterol level before and
after taking medication. Obtain the following for both sets:
2
208
164
3
254
152
1- the mean, mode and median
4
226
144
5
290
212
2- the variance and standard
deviation
6
239
171
7
216
164
3- First, second and third
quartiles
8
286
200
9
243
190
10
217
130...

This requires you to conduct a one-way analysis of variance.
Data are given to you on the times (in minutes) of athletes
competing in a Triathlon for a random sample of athletes using five
different training programs.
a.) Conduct an appropriate test to determine if there are
significant differences in the times for the different training
programs.
b.) Present the results of the analysis and interpret them.
Circuit
Free weights
Isometrics
Meditation
Land and Sea
200
260
175
260
247...

Open Three Hospitals data. SETUP: It is
believed that the number of injuries recorded in hospital 1 is
different from the number of injuries recorded in hospital 2. Given
the data your job is to confirm or disprove this assertion.
10. What test/procedure did you perform? (4
points)
a. Regression
b. Two sided t-test
c. One sided t-test
d. Confidence Interval
11. What is the statistical interpretation? (4
points)
a. Average of data is inconsistent with the claim
b. P-value...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 1 minute ago

asked 32 minutes ago

asked 37 minutes ago

asked 39 minutes ago

asked 55 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago

asked 2 hours ago